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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-15 09:39:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-15 09:39:44 -0700
commitada3fa15057205b7d3f727bba5cd26b5912e350f (patch)
tree60962fc9e4021b92f484d1a58e72cd3906d4f3db /arch
parent2f82af08fcc7dc01a7e98a49a5995a77e32a2925 (diff)
parent5579fd7e6aed8860ea0c8e3f11897493153b10ad (diff)
downloadlinux-stericsson-ada3fa15057205b7d3f727bba5cd26b5912e350f.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (46 commits) powerpc64: convert to dynamic percpu allocator sparc64: use embedding percpu first chunk allocator percpu: kill lpage first chunk allocator x86,percpu: use embedding for 64bit NUMA and page for 32bit NUMA percpu: update embedding first chunk allocator to handle sparse units percpu: use group information to allocate vmap areas sparsely vmalloc: implement pcpu_get_vm_areas() vmalloc: separate out insert_vmalloc_vm() percpu: add chunk->base_addr percpu: add pcpu_unit_offsets[] percpu: introduce pcpu_alloc_info and pcpu_group_info percpu: move pcpu_lpage_build_unit_map() and pcpul_lpage_dump_cfg() upward percpu: add @align to pcpu_fc_alloc_fn_t percpu: make @dyn_size mandatory for pcpu_setup_first_chunk() percpu: drop @static_size from first chunk allocators percpu: generalize first chunk allocator selection percpu: build first chunk allocators selectively percpu: rename 4k first chunk allocator to page percpu: improve boot messages percpu: fix pcpu_reclaim() locking ... Fix trivial conflict as by Tejun Heo in kernel/sched.c
Diffstat (limited to 'arch')
-rw-r--r--arch/alpha/include/asm/percpu.h100
-rw-r--r--arch/alpha/include/asm/tlbflush.h1
-rw-r--r--arch/alpha/kernel/vmlinux.lds.S9
-rw-r--r--arch/arm/kernel/vmlinux.lds.S1
-rw-r--r--arch/avr32/kernel/vmlinux.lds.S9
-rw-r--r--arch/blackfin/kernel/vmlinux.lds.S5
-rw-r--r--arch/blackfin/mm/sram-alloc.c6
-rw-r--r--arch/cris/include/asm/mmu_context.h3
-rw-r--r--arch/cris/kernel/vmlinux.lds.S9
-rw-r--r--arch/cris/mm/fault.c2
-rw-r--r--arch/frv/kernel/vmlinux.lds.S2
-rw-r--r--arch/h8300/kernel/vmlinux.lds.S5
-rw-r--r--arch/ia64/Kconfig3
-rw-r--r--arch/ia64/kernel/setup.c6
-rw-r--r--arch/ia64/kernel/smp.c3
-rw-r--r--arch/ia64/kernel/vmlinux.lds.S16
-rw-r--r--arch/ia64/sn/kernel/setup.c2
-rw-r--r--arch/m32r/kernel/vmlinux.lds.S10
-rw-r--r--arch/m68k/kernel/vmlinux-std.lds10
-rw-r--r--arch/m68k/kernel/vmlinux-sun3.lds9
-rw-r--r--arch/m68knommu/kernel/vmlinux.lds.S7
-rw-r--r--arch/microblaze/kernel/vmlinux.lds.S6
-rw-r--r--arch/mips/kernel/vmlinux.lds.S21
-rw-r--r--arch/mn10300/kernel/vmlinux.lds.S8
-rw-r--r--arch/parisc/kernel/vmlinux.lds.S8
-rw-r--r--arch/powerpc/Kconfig3
-rw-r--r--arch/powerpc/kernel/setup_64.c61
-rw-r--r--arch/powerpc/kernel/vmlinux.lds.S9
-rw-r--r--arch/powerpc/mm/stab.c2
-rw-r--r--arch/powerpc/platforms/ps3/smp.c2
-rw-r--r--arch/s390/include/asm/percpu.h32
-rw-r--r--arch/s390/kernel/vmlinux.lds.S9
-rw-r--r--arch/sh/kernel/vmlinux.lds.S10
-rw-r--r--arch/sparc/Kconfig2
-rw-r--r--arch/sparc/kernel/smp_64.c132
-rw-r--r--arch/sparc/kernel/vmlinux.lds.S8
-rw-r--r--arch/um/include/asm/common.lds.S5
-rw-r--r--arch/um/kernel/dyn.lds.S2
-rw-r--r--arch/um/kernel/uml.lds.S2
-rw-r--r--arch/x86/Kconfig5
-rw-r--r--arch/x86/include/asm/percpu.h9
-rw-r--r--arch/x86/kernel/cpu/cpu_debug.c4
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c8
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_amd.c2
-rw-r--r--arch/x86/kernel/cpu/perf_counter.c14
-rw-r--r--arch/x86/kernel/setup_percpu.c364
-rw-r--r--arch/x86/kernel/vmlinux.lds.S11
-rw-r--r--arch/x86/mm/pageattr.c21
-rw-r--r--arch/xtensa/kernel/vmlinux.lds.S13
49 files changed, 246 insertions, 745 deletions
diff --git a/arch/alpha/include/asm/percpu.h b/arch/alpha/include/asm/percpu.h
index b663f1f10b6a..2c12378e3aa9 100644
--- a/arch/alpha/include/asm/percpu.h
+++ b/arch/alpha/include/asm/percpu.h
@@ -1,102 +1,18 @@
#ifndef __ALPHA_PERCPU_H
#define __ALPHA_PERCPU_H
-#include <linux/compiler.h>
-#include <linux/threads.h>
-#include <linux/percpu-defs.h>
-
-/*
- * Determine the real variable name from the name visible in the
- * kernel sources.
- */
-#define per_cpu_var(var) per_cpu__##var
-
-#ifdef CONFIG_SMP
-
-/*
- * per_cpu_offset() is the offset that has to be added to a
- * percpu variable to get to the instance for a certain processor.
- */
-extern unsigned long __per_cpu_offset[NR_CPUS];
-
-#define per_cpu_offset(x) (__per_cpu_offset[x])
-
-#define __my_cpu_offset per_cpu_offset(raw_smp_processor_id())
-#ifdef CONFIG_DEBUG_PREEMPT
-#define my_cpu_offset per_cpu_offset(smp_processor_id())
-#else
-#define my_cpu_offset __my_cpu_offset
-#endif
-
-#ifndef MODULE
-#define SHIFT_PERCPU_PTR(var, offset) RELOC_HIDE(&per_cpu_var(var), (offset))
-#define PER_CPU_DEF_ATTRIBUTES
-#else
/*
- * To calculate addresses of locally defined variables, GCC uses 32-bit
- * displacement from the GP. Which doesn't work for per cpu variables in
- * modules, as an offset to the kernel per cpu area is way above 4G.
+ * To calculate addresses of locally defined variables, GCC uses
+ * 32-bit displacement from the GP. Which doesn't work for per cpu
+ * variables in modules, as an offset to the kernel per cpu area is
+ * way above 4G.
*
- * This forces allocation of a GOT entry for per cpu variable using
- * ldq instruction with a 'literal' relocation.
- */
-#define SHIFT_PERCPU_PTR(var, offset) ({ \
- extern int simple_identifier_##var(void); \
- unsigned long __ptr, tmp_gp; \
- asm ( "br %1, 1f \n\
- 1: ldgp %1, 0(%1) \n\
- ldq %0, per_cpu__" #var"(%1)\t!literal" \
- : "=&r"(__ptr), "=&r"(tmp_gp)); \
- (typeof(&per_cpu_var(var)))(__ptr + (offset)); })
-
-#define PER_CPU_DEF_ATTRIBUTES __used
-
-#endif /* MODULE */
-
-/*
- * A percpu variable may point to a discarded regions. The following are
- * established ways to produce a usable pointer from the percpu variable
- * offset.
+ * Always use weak definitions for percpu variables in modules.
*/
-#define per_cpu(var, cpu) \
- (*SHIFT_PERCPU_PTR(var, per_cpu_offset(cpu)))
-#define __get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(var, my_cpu_offset))
-#define __raw_get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(var, __my_cpu_offset))
-
-#else /* ! SMP */
-
-#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu_var(var)))
-#define __get_cpu_var(var) per_cpu_var(var)
-#define __raw_get_cpu_var(var) per_cpu_var(var)
-
-#define PER_CPU_DEF_ATTRIBUTES
-
-#endif /* SMP */
-
-#ifdef CONFIG_SMP
-#define PER_CPU_BASE_SECTION ".data.percpu"
-#else
-#define PER_CPU_BASE_SECTION ".data"
-#endif
-
-#ifdef CONFIG_SMP
-
-#ifdef MODULE
-#define PER_CPU_SHARED_ALIGNED_SECTION ""
-#else
-#define PER_CPU_SHARED_ALIGNED_SECTION ".shared_aligned"
-#endif
-#define PER_CPU_FIRST_SECTION ".first"
-
-#else
-
-#define PER_CPU_SHARED_ALIGNED_SECTION ""
-#define PER_CPU_FIRST_SECTION ""
-
+#if defined(MODULE) && defined(CONFIG_SMP)
+#define ARCH_NEEDS_WEAK_PER_CPU
#endif
-#define PER_CPU_ATTRIBUTES
+#include <asm-generic/percpu.h>
#endif /* __ALPHA_PERCPU_H */
diff --git a/arch/alpha/include/asm/tlbflush.h b/arch/alpha/include/asm/tlbflush.h
index 9d87aaa08c0d..e89e0c2e15b1 100644
--- a/arch/alpha/include/asm/tlbflush.h
+++ b/arch/alpha/include/asm/tlbflush.h
@@ -2,6 +2,7 @@
#define _ALPHA_TLBFLUSH_H
#include <linux/mm.h>
+#include <linux/sched.h>
#include <asm/compiler.h>
#include <asm/pgalloc.h>
diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S
index b9d6568e5f7f..6dc03c35caa0 100644
--- a/arch/alpha/kernel/vmlinux.lds.S
+++ b/arch/alpha/kernel/vmlinux.lds.S
@@ -134,13 +134,6 @@ SECTIONS
__bss_stop = .;
_end = .;
- /* Sections to be discarded */
- /DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
.mdebug 0 : {
*(.mdebug)
}
@@ -150,4 +143,6 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
+
+ DISCARDS
}
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 69371028a202..5cc4812c9763 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -83,6 +83,7 @@ SECTIONS
EXIT_TEXT
EXIT_DATA
*(.exitcall.exit)
+ *(.discard)
*(.ARM.exidx.exit.text)
*(.ARM.extab.exit.text)
#ifndef CONFIG_HOTPLUG_CPU
diff --git a/arch/avr32/kernel/vmlinux.lds.S b/arch/avr32/kernel/vmlinux.lds.S
index 7910d41eb886..c4b56654349a 100644
--- a/arch/avr32/kernel/vmlinux.lds.S
+++ b/arch/avr32/kernel/vmlinux.lds.S
@@ -124,14 +124,11 @@ SECTIONS
_end = .;
}
+ DWARF_DEBUG
+
/* When something in the kernel is NOT compiled as a module, the module
* cleanup code and data are put into these segments. Both can then be
* thrown away, as cleanup code is never called unless it's a module.
*/
- /DISCARD/ : {
- EXIT_DATA
- *(.exitcall.exit)
- }
-
- DWARF_DEBUG
+ DISCARDS
}
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
index 6ac307ca0d80..d7ffe299b979 100644
--- a/arch/blackfin/kernel/vmlinux.lds.S
+++ b/arch/blackfin/kernel/vmlinux.lds.S
@@ -277,8 +277,5 @@ SECTIONS
DWARF_DEBUG
- /DISCARD/ :
- {
- *(.exitcall.exit)
- }
+ DISCARDS
}
diff --git a/arch/blackfin/mm/sram-alloc.c b/arch/blackfin/mm/sram-alloc.c
index 0bc3c4ef0aad..99e4dbb1dfd1 100644
--- a/arch/blackfin/mm/sram-alloc.c
+++ b/arch/blackfin/mm/sram-alloc.c
@@ -42,9 +42,9 @@
#include <asm/mem_map.h>
#include "blackfin_sram.h"
-static DEFINE_PER_CPU(spinlock_t, l1sram_lock) ____cacheline_aligned_in_smp;
-static DEFINE_PER_CPU(spinlock_t, l1_data_sram_lock) ____cacheline_aligned_in_smp;
-static DEFINE_PER_CPU(spinlock_t, l1_inst_sram_lock) ____cacheline_aligned_in_smp;
+static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1sram_lock);
+static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_data_sram_lock);
+static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_inst_sram_lock);
static spinlock_t l2_sram_lock ____cacheline_aligned_in_smp;
/* the data structure for L1 scratchpad and DATA SRAM */
diff --git a/arch/cris/include/asm/mmu_context.h b/arch/cris/include/asm/mmu_context.h
index 72ba08dcfd18..1d45fd6365b7 100644
--- a/arch/cris/include/asm/mmu_context.h
+++ b/arch/cris/include/asm/mmu_context.h
@@ -17,7 +17,8 @@ extern void switch_mm(struct mm_struct *prev, struct mm_struct *next,
* registers like cr3 on the i386
*/
-extern volatile DEFINE_PER_CPU(pgd_t *,current_pgd); /* defined in arch/cris/mm/fault.c */
+/* defined in arch/cris/mm/fault.c */
+DECLARE_PER_CPU(pgd_t *, current_pgd);
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
diff --git a/arch/cris/kernel/vmlinux.lds.S b/arch/cris/kernel/vmlinux.lds.S
index 0d2adfc794d4..6c81836b9229 100644
--- a/arch/cris/kernel/vmlinux.lds.S
+++ b/arch/cris/kernel/vmlinux.lds.S
@@ -140,12 +140,7 @@ SECTIONS
_end = .;
__end = .;
- /* Sections to be discarded */
- /DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
dram_end = dram_start + (CONFIG_ETRAX_DRAM_SIZE - __CONFIG_ETRAX_VMEM_SIZE)*1024*1024;
+
+ DISCARDS
}
diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c
index f925115e3250..4a7cdd9ea1ee 100644
--- a/arch/cris/mm/fault.c
+++ b/arch/cris/mm/fault.c
@@ -29,7 +29,7 @@ extern void die_if_kernel(const char *, struct pt_regs *, long);
/* current active page directory */
-volatile DEFINE_PER_CPU(pgd_t *,current_pgd);
+DEFINE_PER_CPU(pgd_t *, current_pgd);
unsigned long cris_signal_return_page;
/*
diff --git a/arch/frv/kernel/vmlinux.lds.S b/arch/frv/kernel/vmlinux.lds.S
index 22d9787406ed..7dbf41f68b52 100644
--- a/arch/frv/kernel/vmlinux.lds.S
+++ b/arch/frv/kernel/vmlinux.lds.S
@@ -177,6 +177,8 @@ SECTIONS
.debug_ranges 0 : { *(.debug_ranges) }
.comment 0 : { *(.comment) }
+
+ DISCARDS
}
__kernel_image_size_no_bss = __bss_start - __kernel_image_start;
diff --git a/arch/h8300/kernel/vmlinux.lds.S b/arch/h8300/kernel/vmlinux.lds.S
index 43a87b9085b6..662b02ecb86e 100644
--- a/arch/h8300/kernel/vmlinux.lds.S
+++ b/arch/h8300/kernel/vmlinux.lds.S
@@ -152,9 +152,6 @@ SECTIONS
__end = . ;
__ramstart = .;
}
- /DISCARD/ : {
- *(.exitcall.exit)
- }
.romfs :
{
*(.romfs*)
@@ -165,4 +162,6 @@ SECTIONS
COMMAND_START = . - 0x200 ;
__ramend = . ;
}
+
+ DISCARDS
}
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index e6246119932a..011a1cdf0eb5 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -89,6 +89,9 @@ config GENERIC_TIME_VSYSCALL
bool
default y
+config HAVE_LEGACY_PER_CPU_AREA
+ def_bool y
+
config HAVE_SETUP_PER_CPU_AREA
def_bool y
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 1b23ec126b63..1de86c96801d 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -855,11 +855,17 @@ identify_cpu (struct cpuinfo_ia64 *c)
c->unimpl_pa_mask = ~((1L<<63) | ((1L << phys_addr_size) - 1));
}
+/*
+ * In UP configuration, setup_per_cpu_areas() is defined in
+ * include/linux/percpu.h
+ */
+#ifdef CONFIG_SMP
void __init
setup_per_cpu_areas (void)
{
/* start_kernel() requires this... */
}
+#endif
/*
* Do the following calculations:
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index f0c521b0ba4c..93ebfea43c6c 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -58,7 +58,8 @@ static struct local_tlb_flush_counts {
unsigned int count;
} __attribute__((__aligned__(32))) local_tlb_flush_counts[NR_CPUS];
-static DEFINE_PER_CPU(unsigned short, shadow_flush_counts[NR_CPUS]) ____cacheline_aligned;
+static DEFINE_PER_CPU_SHARED_ALIGNED(unsigned short [NR_CPUS],
+ shadow_flush_counts);
#define IPI_CALL_FUNC 0
#define IPI_CPU_STOP 1
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 4a95e86b9ac2..eb4214d1c5af 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -24,14 +24,14 @@ PHDRS {
}
SECTIONS
{
- /* Sections to be discarded */
+ /* unwind exit sections must be discarded before the rest of the
+ sections get included. */
/DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
*(.IA_64.unwind.exit.text)
*(.IA_64.unwind_info.exit.text)
- }
+ *(.comment)
+ *(.note)
+ }
v = PAGE_OFFSET; /* this symbol is here to make debugging easier... */
phys_start = _start - LOAD_OFFSET;
@@ -316,7 +316,7 @@ SECTIONS
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
- /* These must appear regardless of . */
- /DISCARD/ : { *(.comment) }
- /DISCARD/ : { *(.note) }
+
+ /* Default discards */
+ DISCARDS
}
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index e456f062f241..ece1bf994499 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -71,7 +71,7 @@ EXPORT_SYMBOL(sn_rtc_cycles_per_second);
DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
EXPORT_PER_CPU_SYMBOL(__sn_hub_info);
-DEFINE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]);
+DEFINE_PER_CPU(short [MAX_COMPACT_NODES], __sn_cnodeid_to_nasid);
EXPORT_PER_CPU_SYMBOL(__sn_cnodeid_to_nasid);
DEFINE_PER_CPU(struct nodepda_s *, __sn_nodepda);
diff --git a/arch/m32r/kernel/vmlinux.lds.S b/arch/m32r/kernel/vmlinux.lds.S
index 4179adf6c624..de5e21cca6a5 100644
--- a/arch/m32r/kernel/vmlinux.lds.S
+++ b/arch/m32r/kernel/vmlinux.lds.S
@@ -120,13 +120,6 @@ SECTIONS
_end = . ;
- /* Sections to be discarded */
- /DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
@@ -135,4 +128,7 @@ SECTIONS
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
+
+ /* Sections to be discarded */
+ DISCARDS
}
diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index 01d212bb05a6..47eac19e8f61 100644
--- a/arch/m68k/kernel/vmlinux-std.lds
+++ b/arch/m68k/kernel/vmlinux-std.lds
@@ -82,13 +82,6 @@ SECTIONS
_end = . ;
- /* Sections to be discarded */
- /DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
@@ -97,4 +90,7 @@ SECTIONS
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
+
+ /* Sections to be discarded */
+ DISCARDS
}
diff --git a/arch/m68k/kernel/vmlinux-sun3.lds b/arch/m68k/kernel/vmlinux-sun3.lds
index c192f773db96..03efaf04d7d7 100644
--- a/arch/m68k/kernel/vmlinux-sun3.lds
+++ b/arch/m68k/kernel/vmlinux-sun3.lds
@@ -77,13 +77,6 @@ __init_begin = .;
_end = . ;
- /* Sections to be discarded */
- /DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
.crap : {
/* Stabs debugging sections. */
*(.stab)
@@ -96,4 +89,6 @@ __init_begin = .;
*(.note)
}
+ /* Sections to be discarded */
+ DISCARDS
}
diff --git a/arch/m68knommu/kernel/vmlinux.lds.S b/arch/m68knommu/kernel/vmlinux.lds.S
index b7fe505e358d..2736a5e309c0 100644
--- a/arch/m68knommu/kernel/vmlinux.lds.S
+++ b/arch/m68knommu/kernel/vmlinux.lds.S
@@ -184,12 +184,6 @@ SECTIONS {
__init_end = .;
} > INIT
- /DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
.bss : {
. = ALIGN(4);
_sbss = . ;
@@ -200,5 +194,6 @@ SECTIONS {
_end = . ;
} > BSS
+ DISCARDS
}
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
index d34d38dcd12c..ec5fa91a48d8 100644
--- a/arch/microblaze/kernel/vmlinux.lds.S
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -23,8 +23,8 @@ SECTIONS {
_stext = . ;
*(.text .text.*)
*(.fixup)
-
- *(.exitcall.exit)
+ EXIT_TEXT
+ EXIT_CALL
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
@@ -162,4 +162,6 @@ SECTIONS {
}
. = ALIGN(4096);
_end = .;
+
+ DISCARDS
}
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 58738c8d754f..1474c18fb777 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -176,17 +176,6 @@ SECTIONS
_end = . ;
- /* Sections to be discarded */
- /DISCARD/ : {
- *(.exitcall.exit)
-
- /* ABI crap starts here */
- *(.MIPS.options)
- *(.options)
- *(.pdr)
- *(.reginfo)
- }
-
/* These mark the ABI of the kernel for debuggers. */
.mdebug.abi32 : {
KEEP(*(.mdebug.abi32))
@@ -212,4 +201,14 @@ SECTIONS
*(.gptab.bss)
*(.gptab.sbss)
}
+
+ /* Sections to be discarded */
+ DISCARDS
+ /DISCARD/ : {
+ /* ABI crap starts here */
+ *(.MIPS.options)
+ *(.options)
+ *(.pdr)
+ *(.reginfo)
+ }
}
diff --git a/arch/mn10300/kernel/vmlinux.lds.S b/arch/mn10300/kernel/vmlinux.lds.S
index f4aa07934654..76f41bdb79c4 100644
--- a/arch/mn10300/kernel/vmlinux.lds.S
+++ b/arch/mn10300/kernel/vmlinux.lds.S
@@ -115,12 +115,10 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
pg0 = .;
- /* Sections to be discarded */
- /DISCARD/ : {
- EXIT_CALL
- }
-
STABS_DEBUG
DWARF_DEBUG
+
+ /* Sections to be discarded */
+ DISCARDS
}
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index fd2cc4fd2b65..aea1784edbd1 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -237,9 +237,12 @@ SECTIONS
/* freed after init ends here */
_end = . ;
+ STABS_DEBUG
+ .note 0 : { *(.note) }
+
/* Sections to be discarded */
+ DISCARDS
/DISCARD/ : {
- *(.exitcall.exit)
#ifdef CONFIG_64BIT
/* temporary hack until binutils is fixed to not emit these
* for static binaries
@@ -252,7 +255,4 @@ SECTIONS
*(.gnu.hash)
#endif
}
-
- STABS_DEBUG
- .note 0 : { *(.note) }
}
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index d00131ca0835..2c42e1526d03 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -49,6 +49,9 @@ config GENERIC_HARDIRQS_NO__DO_IRQ
config HAVE_SETUP_PER_CPU_AREA
def_bool PPC64
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
+ def_bool PPC64
+
config IRQ_PER_CPU
bool
default y
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 1f6816003ebe..aa6e4500635f 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -57,6 +57,7 @@
#include <asm/cache.h>
#include <asm/page.h>
#include <asm/mmu.h>
+#include <asm/mmu-hash64.h>
#include <asm/firmware.h>
#include <asm/xmon.h>
#include <asm/udbg.h>
@@ -569,25 +570,53 @@ void cpu_die(void)
}
#ifdef CONFIG_SMP
-void __init setup_per_cpu_areas(void)
+#define PCPU_DYN_SIZE ()
+
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
{
- int i;
- unsigned long size;
- char *ptr;
-
- /* Copy section for each CPU (we discard the original) */
- size = ALIGN(__per_cpu_end - __per_cpu_start, PAGE_SIZE);
-#ifdef CONFIG_MODULES
- if (size < PERCPU_ENOUGH_ROOM)
- size = PERCPU_ENOUGH_ROOM;
-#endif
+ return __alloc_bootmem_node(NODE_DATA(cpu_to_node(cpu)), size, align,
+ __pa(MAX_DMA_ADDRESS));
+}
- for_each_possible_cpu(i) {
- ptr = alloc_bootmem_pages_node(NODE_DATA(cpu_to_node(i)), size);
+static void __init pcpu_fc_free(void *ptr, size_t size)
+{
+ free_bootmem(__pa(ptr), size);
+}
- paca[i].data_offset = ptr - __per_cpu_start;
- memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
- }
+static int pcpu_cpu_distance(unsigned int from, unsigned int to)
+{
+ if (cpu_to_node(from) == cpu_to_node(to))
+ return LOCAL_DISTANCE;
+ else
+ return REMOTE_DISTANCE;
+}
+
+void __init setup_per_cpu_areas(void)
+{
+ const size_t dyn_size = PERCPU_MODULE_RESERVE + PERCPU_DYNAMIC_RESERVE;
+ size_t atom_size;
+ unsigned long delta;
+ unsigned int cpu;
+ int rc;
+
+ /*
+ * Linear mapping is one of 4K, 1M and 16M. For 4K, no need
+ * to group units. For larger mappings, use 1M atom which
+ * should be large enough to contain a number of units.
+ */
+ if (mmu_linear_psize == MMU_PAGE_4K)
+ atom_size = PAGE_SIZE;
+ else
+ atom_size = 1 << 20;
+
+ rc = pcpu_embed_first_chunk(0, dyn_size, atom_size, pcpu_cpu_distance,
+ pcpu_fc_alloc, pcpu_fc_free);
+ if (rc < 0)
+ panic("cannot initialize percpu area (err=%d)", rc);
+
+ delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
+ for_each_possible_cpu(cpu)
+ paca[cpu].data_offset = delta + pcpu_unit_offsets[cpu];
}
#endif
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 8ef8a14abc95..244e3658983c 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -37,12 +37,6 @@ jiffies = jiffies_64 + 4;
#endif
SECTIONS
{
- /* Sections to be discarded. */
- /DISCARD/ : {
- *(.exitcall.exit)
- EXIT_DATA
- }
-
. = KERNELBASE;
/*
@@ -298,4 +292,7 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
_end = . ;
PROVIDE32 (end = .);
+
+ /* Sections to be discarded. */
+ DISCARDS
}
diff --git a/arch/powerpc/mm/stab.c b/arch/powerpc/mm/stab.c
index ab5fb48b3e90..687fddaa24c5 100644
--- a/arch/powerpc/mm/stab.c
+++ b/arch/powerpc/mm/stab.c
@@ -31,7 +31,7 @@ struct stab_entry {
#define NR_STAB_CACHE_ENTRIES 8
static DEFINE_PER_CPU(long, stab_cache_ptr);
-static DEFINE_PER_CPU(long, stab_cache[NR_STAB_CACHE_ENTRIES]);
+static DEFINE_PER_CPU(long [NR_STAB_CACHE_ENTRIES], stab_cache);
/*
* Create a segment table entry for the given esid/vsid pair.
diff --git a/arch/powerpc/platforms/ps3/smp.c b/arch/powerpc/platforms/ps3/smp.c
index f6e04bcc70ef..51ffde40af2b 100644
--- a/arch/powerpc/platforms/ps3/smp.c
+++ b/arch/powerpc/platforms/ps3/smp.c
@@ -37,7 +37,7 @@
*/
#define MSG_COUNT 4
-static DEFINE_PER_CPU(unsigned int, ps3_ipi_virqs[MSG_COUNT]);
+static DEFINE_PER_CPU(unsigned int [MSG_COUNT], ps3_ipi_virqs);
static void do_message_pass(int target, int msg)
{
diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h
index 408d60b4f75b..f7ad8719d02d 100644
--- a/arch/s390/include/asm/percpu.h
+++ b/arch/s390/include/asm/percpu.h
@@ -1,37 +1,21 @@
#ifndef __ARCH_S390_PERCPU__
#define __ARCH_S390_PERCPU__
-#include <linux/compiler.h>
-#include <asm/lowcore.h>
-
/*
* s390 uses its own implementation for per cpu data, the offset of
* the cpu local data area is cached in the cpu's lowcore memory.
- * For 64 bit module code s390 forces the use of a GOT slot for the
- * address of the per cpu variable. This is needed because the module
- * may be more than 4G above the per cpu area.
*/
-#if defined(__s390x__) && defined(MODULE)
-
-#define SHIFT_PERCPU_PTR(ptr,offset) (({ \
- extern int simple_identifier_##var(void); \
- unsigned long *__ptr; \
- asm ( "larl %0, %1@GOTENT" \
- : "=a" (__ptr) : "X" (ptr) ); \
- (typeof(ptr))((*__ptr) + (offset)); }))
-
-#else
-
-#define SHIFT_PERCPU_PTR(ptr, offset) (({ \
- extern int simple_identifier_##var(void); \
- unsigned long __ptr; \
- asm ( "" : "=a" (__ptr) : "0" (ptr) ); \
- (typeof(ptr)) (__ptr + (offset)); }))
+#define __my_cpu_offset S390_lowcore.percpu_offset
+/*
+ * For 64 bit module code, the module may be more than 4G above the
+ * per cpu area, use weak definitions to force the compiler to
+ * generate external references.
+ */
+#if defined(CONFIG_SMP) && defined(__s390x__) && defined(MODULE)
+#define ARCH_NEEDS_WEAK_PER_CPU
#endif
-#define __my_cpu_offset S390_lowcore.percpu_offset
-
#include <asm-generic/percpu.h>
#endif /* __ARCH_S390_PERCPU__ */
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 7315f9e67e1d..bc15ef93e656 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -84,13 +84,10 @@ SECTIONS
_end = . ;
- /* Sections to be discarded */
- /DISCARD/ : {
- EXIT_DATA
- *(.exitcall.exit)
- }
-
/* Debugging sections. */
STABS_DEBUG
DWARF_DEBUG
+
+ /* Sections to be discarded */
+ DISCARDS
}
diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S
index f53c76acaede..0ce254bca92f 100644
--- a/arch/sh/kernel/vmlinux.lds.S
+++ b/arch/sh/kernel/vmlinux.lds.S
@@ -163,16 +163,14 @@ SECTIONS
_end = . ;
}
+ STABS_DEBUG
+ DWARF_DEBUG
+
/*
* When something in the kernel is NOT compiled as a module, the
* module cleanup code and data are put into these segments. Both
* can then be thrown away, as cleanup code is never called unless
* it's a module.
*/
- /DISCARD/ : {
- *(.exitcall.exit)
- }
-
- STABS_DEBUG
- DWARF_DEBUG
+ DISCARDS
}
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 2bd5c287538a..86b82348b97c 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -99,7 +99,7 @@ config AUDIT_ARCH
config HAVE_SETUP_PER_CPU_AREA
def_bool y if SPARC64
-config HAVE_DYNAMIC_PER_CPU_AREA
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
def_bool y if SPARC64
config GENERIC_HARDIRQS_NO__DO_IRQ
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index 3691907a43b4..ff68373ce6d6 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1389,8 +1389,8 @@ void smp_send_stop(void)
* RETURNS:
* Pointer to the allocated area on success, NULL on failure.
*/
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
- unsigned long align)
+static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size,
+ size_t align)
{
const unsigned long goal = __pa(MAX_DMA_ADDRESS);
#ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -1415,127 +1415,35 @@ static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
#endif
}
-static size_t pcpur_size __initdata;
-static void **pcpur_ptrs __initdata;
-
-static struct page * __init pcpur_get_page(unsigned int cpu, int pageno)
+static void __init pcpu_free_bootmem(void *ptr, size_t size)
{
- size_t off = (size_t)pageno << PAGE_SHIFT;
-
- if (off >= pcpur_size)
- return NULL;
-
- return virt_to_page(pcpur_ptrs[cpu] + off);
+ free_bootmem(__pa(ptr), size);
}
-#define PCPU_CHUNK_SIZE (4UL * 1024UL * 1024UL)
-
-static void __init pcpu_map_range(unsigned long start, unsigned long end,
- struct page *page)
+static int pcpu_cpu_distance(unsigned int from, unsigned int to)
{
- unsigned long pfn = page_to_pfn(page);
- unsigned long pte_base;
-
- BUG_ON((pfn<<PAGE_SHIFT)&(PCPU_CHUNK_SIZE - 1UL));
-
- pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U |
- _PAGE_CP_4U | _PAGE_CV_4U |
- _PAGE_P_4U | _PAGE_W_4U);
- if (tlb_type == hypervisor)
- pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V |
- _PAGE_CP_4V | _PAGE_CV_4V |
- _PAGE_P_4V | _PAGE_W_4V);
-
- while (start < end) {
- pgd_t *pgd = pgd_offset_k(start);
- unsigned long this_end;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
-
- pud = pud_offset(pgd, start);
- if (pud_none(*pud)) {
- pmd_t *new;
-
- new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
- pud_populate(&init_mm, pud, new);
- }
-
- pmd = pmd_offset(pud, start);
- if (!pmd_present(*pmd)) {
- pte_t *new;
-
- new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
- pmd_populate_kernel(&init_mm, pmd, new);
- }
-
- pte = pte_offset_kernel(pmd, start);
- this_end = (start + PMD_SIZE) & PMD_MASK;
- if (this_end > end)
- this_end = end;
-
- while (start < this_end) {
- unsigned long paddr = pfn << PAGE_SHIFT;
-
- pte_val(*pte) = (paddr | pte_base);
-
- start += PAGE_SIZE;
- pte++;
- pfn++;
- }
- }
+ if (cpu_to_node(from) == cpu_to_node(to))
+ return LOCAL_DISTANCE;
+ else
+ return REMOTE_DISTANCE;
}
void __init setup_per_cpu_areas(void)
{
- size_t dyn_size, static_size = __per_cpu_end - __per_cpu_start;
- static struct vm_struct vm;
- unsigned long delta, cpu;
- size_t pcpu_unit_size;
- size_t ptrs_size;
-
- pcpur_size = PFN_ALIGN(static_size + PERCPU_MODULE_RESERVE +
- PERCPU_DYNAMIC_RESERVE);
- dyn_size = pcpur_size - static_size - PERCPU_MODULE_RESERVE;
-
+ unsigned long delta;
+ unsigned int cpu;
+ int rc;
- ptrs_size = PFN_ALIGN(nr_cpu_ids * sizeof(pcpur_ptrs[0]));
- pcpur_ptrs = alloc_bootmem(ptrs_size);
-
- for_each_possible_cpu(cpu) {
- pcpur_ptrs[cpu] = pcpu_alloc_bootmem(cpu, PCPU_CHUNK_SIZE,
- PCPU_CHUNK_SIZE);
-
- free_bootmem(__pa(pcpur_ptrs[cpu] + pcpur_size),
- PCPU_CHUNK_SIZE - pcpur_size);
-
- memcpy(pcpur_ptrs[cpu], __per_cpu_load, static_size);
- }
-
- /* allocate address and map */
- vm.flags = VM_ALLOC;
- vm.size = nr_cpu_ids * PCPU_CHUNK_SIZE;
- vm_area_register_early(&vm, PCPU_CHUNK_SIZE);
-
- for_each_possible_cpu(cpu) {
- unsigned long start = (unsigned long) vm.addr;
- unsigned long end;
-
- start += cpu * PCPU_CHUNK_SIZE;
- end = start + PCPU_CHUNK_SIZE;
- pcpu_map_range(start, end, virt_to_page(pcpur_ptrs[cpu]));
- }
-
- pcpu_unit_size = pcpu_setup_first_chunk(pcpur_get_page, static_size,
- PERCPU_MODULE_RESERVE, dyn_size,
- PCPU_CHUNK_SIZE, vm.addr, NULL);
-
- free_bootmem(__pa(pcpur_ptrs), ptrs_size);
+ rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
+ PERCPU_DYNAMIC_RESERVE, 4 << 20,
+ pcpu_cpu_distance, pcpu_alloc_bootmem,
+ pcpu_free_bootmem);
+ if (rc)
+ panic("failed to initialize first chunk (%d)", rc);
delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
- for_each_possible_cpu(cpu) {
- __per_cpu_offset(cpu) = delta + cpu * pcpu_unit_size;
- }
+ for_each_possible_cpu(cpu)
+ __per_cpu_offset(cpu) = delta + pcpu_unit_offsets[cpu];
/* Setup %g5 for the boot cpu. */
__local_per_cpu_offset = __per_cpu_offset(smp_processor_id());
diff --git a/arch/sparc/kernel/vmlinux.lds.S b/arch/sparc/kernel/vmlinux.lds.S
index fcbbd000ec08..866390feb683 100644
--- a/arch/sparc/kernel/vmlinux.lds.S
+++ b/arch/sparc/kernel/vmlinux.lds.S
@@ -171,12 +171,8 @@ SECTIONS
}
_end = . ;
- /DISCARD/ : {
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
STABS_DEBUG
DWARF_DEBUG
+
+ DISCARDS
}
diff --git a/arch/um/include/asm/common.lds.S b/arch/um/include/asm/common.lds.S
index cb0248616d49..37ecc5577a9a 100644
--- a/arch/um/include/asm/common.lds.S
+++ b/arch/um/include/asm/common.lds.S
@@ -123,8 +123,3 @@
__initramfs_end = .;
}
- /* Sections to be discarded */
- /DISCARD/ : {
- *(.exitcall.exit)
- }
-
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 9975e1ab44fb..715a188c0472 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -156,4 +156,6 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
+
+ DISCARDS
}
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index 11b835248b86..2ebd39765db8 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -100,4 +100,6 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
+
+ DISCARDS
}
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index a800b0faaad6..e98e81a04971 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -150,7 +150,10 @@ config ARCH_HAS_CACHE_LINE_SIZE
config HAVE_SETUP_PER_CPU_AREA
def_bool y
-config HAVE_DYNAMIC_PER_CPU_AREA
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
+ def_bool y
+
+config NEED_PER_CPU_PAGE_FIRST_CHUNK
def_bool y
config HAVE_CPUMASK_OF_CPU_MAP
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 04eacefcfd26..b65a36defeb7 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -168,15 +168,6 @@ do { \
/* We can use this directly for local CPU (faster). */
DECLARE_PER_CPU(unsigned long, this_cpu_off);
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-void *pcpu_lpage_remapped(void *kaddr);
-#else
-static inline void *pcpu_lpage_remapped(void *kaddr)
-{
- return NULL;
-}
-#endif
-
#endif /* !__ASSEMBLY__ */
#ifdef CONFIG_SMP
diff --git a/arch/x86/kernel/cpu/cpu_debug.c b/arch/x86/kernel/cpu/cpu_debug.c
index 6b2a52dd0403..dca325c03999 100644
--- a/arch/x86/kernel/cpu/cpu_debug.c
+++ b/arch/x86/kernel/cpu/cpu_debug.c
@@ -30,8 +30,8 @@
#include <asm/apic.h>
#include <asm/desc.h>
-static DEFINE_PER_CPU(struct cpu_cpuX_base, cpu_arr[CPU_REG_ALL_BIT]);
-static DEFINE_PER_CPU(struct cpu_private *, priv_arr[MAX_CPU_FILES]);
+static DEFINE_PER_CPU(struct cpu_cpuX_base [CPU_REG_ALL_BIT], cpu_arr);
+static DEFINE_PER_CPU(struct cpu_private * [MAX_CPU_FILES], priv_arr);
static DEFINE_PER_CPU(int, cpu_priv_count);
static DEFINE_MUTEX(cpu_debug_lock);
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 9bfe9d2ea615..fdd51b554355 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1101,7 +1101,7 @@ void mce_log_therm_throt_event(__u64 status)
*/
static int check_interval = 5 * 60; /* 5 minutes */
-static DEFINE_PER_CPU(int, next_interval); /* in jiffies */
+static DEFINE_PER_CPU(int, mce_next_interval); /* in jiffies */
static DEFINE_PER_CPU(struct timer_list, mce_timer);
static void mcheck_timer(unsigned long data)
@@ -1120,7 +1120,7 @@ static void mcheck_timer(unsigned long data)
* Alert userspace if needed. If we logged an MCE, reduce the
* polling interval, otherwise increase the polling interval.
*/
- n = &__get_cpu_var(next_interval);
+ n = &__get_cpu_var(mce_next_interval);
if (mce_notify_irq())
*n = max(*n/2, HZ/100);
else
@@ -1335,7 +1335,7 @@ static void mce_cpu_features(struct cpuinfo_x86 *c)
static void mce_init_timer(void)
{
struct timer_list *t = &__get_cpu_var(mce_timer);
- int *n = &__get_cpu_var(next_interval);
+ int *n = &__get_cpu_var(mce_next_interval);
if (mce_ignore_ce)
return;
@@ -1935,7 +1935,7 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
t->expires = round_jiffies(jiffies +
- __get_cpu_var(next_interval));
+ __get_cpu_var(mce_next_interval));
add_timer_on(t, cpu);
smp_call_function_single(cpu, mce_reenable_cpu, &action, 1);
break;
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 1fecba404fd8..8cd5224943b5 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -69,7 +69,7 @@ struct threshold_bank {
struct threshold_block *blocks;
cpumask_var_t cpus;
};
-static DEFINE_PER_CPU(struct threshold_bank *, threshold_banks[NR_BANKS]);
+static DEFINE_PER_CPU(struct threshold_bank * [NR_BANKS], threshold_banks);
#ifdef CONFIG_SMP
static unsigned char shared_bank[NR_BANKS] = {
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index f9cd0849bd42..2732e2c1e4d3 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -1211,7 +1211,7 @@ amd_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
x86_pmu_disable_counter(hwc, idx);
}
-static DEFINE_PER_CPU(u64, prev_left[X86_PMC_IDX_MAX]);
+static DEFINE_PER_CPU(u64 [X86_PMC_IDX_MAX], pmc_prev_left);
/*
* Set the next IRQ period, based on the hwc->period_left value.
@@ -1253,7 +1253,7 @@ x86_perf_counter_set_period(struct perf_counter *counter,
if (left > x86_pmu.max_period)
left = x86_pmu.max_period;
- per_cpu(prev_left[idx], smp_processor_id()) = left;
+ per_cpu(pmc_prev_left[idx], smp_processor_id()) = left;
/*
* The hw counter starts counting from this counter offset,
@@ -1470,7 +1470,7 @@ void perf_counter_print_debug(void)
rdmsrl(x86_pmu.eventsel + idx, pmc_ctrl);
rdmsrl(x86_pmu.perfctr + idx, pmc_count);
- prev_left = per_cpu(prev_left[idx], cpu);
+ prev_left = per_cpu(pmc_prev_left[idx], cpu);
pr_info("CPU#%d: gen-PMC%d ctrl: %016llx\n",
cpu, idx, pmc_ctrl);
@@ -2110,8 +2110,8 @@ void callchain_store(struct perf_callchain_entry *entry, u64 ip)
entry->ip[entry->nr++] = ip;
}
-static DEFINE_PER_CPU(struct perf_callchain_entry, irq_entry);
-static DEFINE_PER_CPU(struct perf_callchain_entry, nmi_entry);
+static DEFINE_PER_CPU(struct perf_callchain_entry, pmc_irq_entry);
+static DEFINE_PER_CPU(struct perf_callchain_entry, pmc_nmi_entry);
static DEFINE_PER_CPU(int, in_nmi_frame);
@@ -2264,9 +2264,9 @@ struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
struct perf_callchain_entry *entry;
if (in_nmi())
- entry = &__get_cpu_var(nmi_entry);
+ entry = &__get_cpu_var(pmc_nmi_entry);
else
- entry = &__get_cpu_var(irq_entry);
+ entry = &__get_cpu_var(pmc_irq_entry);
entry->nr = 0;
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 07d81916f212..d559af913e1f 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -55,6 +55,7 @@ EXPORT_SYMBOL(__per_cpu_offset);
#define PERCPU_FIRST_CHUNK_RESERVE 0
#endif
+#ifdef CONFIG_X86_32
/**
* pcpu_need_numa - determine percpu allocation needs to consider NUMA
*
@@ -83,6 +84,7 @@ static bool __init pcpu_need_numa(void)
#endif
return false;
}
+#endif
/**
* pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
@@ -124,308 +126,35 @@ static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
}
/*
- * Large page remap allocator
- *
- * This allocator uses PMD page as unit. A PMD page is allocated for
- * each cpu and each is remapped into vmalloc area using PMD mapping.
- * As PMD page is quite large, only part of it is used for the first
- * chunk. Unused part is returned to the bootmem allocator.
- *
- * So, the PMD pages are mapped twice - once to the physical mapping
- * and to the vmalloc area for the first percpu chunk. The double
- * mapping does add one more PMD TLB entry pressure but still is much
- * better than only using 4k mappings while still being NUMA friendly.
+ * Helpers for first chunk memory allocation
*/
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-struct pcpul_ent {
- unsigned int cpu;
- void *ptr;
-};
-
-static size_t pcpul_size;
-static struct pcpul_ent *pcpul_map;
-static struct vm_struct pcpul_vm;
-
-static struct page * __init pcpul_get_page(unsigned int cpu, int pageno)
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
{
- size_t off = (size_t)pageno << PAGE_SHIFT;
-
- if (off >= pcpul_size)
- return NULL;
-
- return virt_to_page(pcpul_map[cpu].ptr + off);
+ return pcpu_alloc_bootmem(cpu, size, align);
}
-static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
+static void __init pcpu_fc_free(void *ptr, size_t size)
{
- size_t map_size, dyn_size;
- unsigned int cpu;
- int i, j;
- ssize_t ret;
-
- if (!chosen) {
- size_t vm_size = VMALLOC_END - VMALLOC_START;
- size_t tot_size = nr_cpu_ids * PMD_SIZE;
-
- /* on non-NUMA, embedding is better */
- if (!pcpu_need_numa())
- return -EINVAL;
-
- /* don't consume more than 20% of vmalloc area */
- if (tot_size > vm_size / 5) {
- pr_info("PERCPU: too large chunk size %zuMB for "
- "large page remap\n", tot_size >> 20);
- return -EINVAL;
- }
- }
-
- /* need PSE */
- if (!cpu_has_pse) {
- pr_warning("PERCPU: lpage allocator requires PSE\n");
- return -EINVAL;
- }
-
- /*
- * Currently supports only single page. Supporting multiple
- * pages won't be too difficult if it ever becomes necessary.
- */
- pcpul_size = PFN_ALIGN(static_size + PERCPU_MODULE_RESERVE +
- PERCPU_DYNAMIC_RESERVE);
- if (pcpul_size > PMD_SIZE) {
- pr_warning("PERCPU: static data is larger than large page, "
- "can't use large page\n");
- return -EINVAL;
- }
- dyn_size = pcpul_size - static_size - PERCPU_FIRST_CHUNK_RESERVE;
-
- /* allocate pointer array and alloc large pages */
- map_size = PFN_ALIGN(nr_cpu_ids * sizeof(pcpul_map[0]));
- pcpul_map = alloc_bootmem(map_size);
-
- for_each_possible_cpu(cpu) {
- pcpul_map[cpu].cpu = cpu;
- pcpul_map[cpu].ptr = pcpu_alloc_bootmem(cpu, PMD_SIZE,
- PMD_SIZE);
- if (!pcpul_map[cpu].ptr) {
- pr_warning("PERCPU: failed to allocate large page "
- "for cpu%u\n", cpu);
- goto enomem;
- }
-
- /*
- * Only use pcpul_size bytes and give back the rest.
- *
- * Ingo: The 2MB up-rounding bootmem is needed to make
- * sure the partial 2MB page is still fully RAM - it's
- * not well-specified to have a PAT-incompatible area
- * (unmapped RAM, device memory, etc.) in that hole.
- */
- free_bootmem(__pa(pcpul_map[cpu].ptr + pcpul_size),
- PMD_SIZE - pcpul_size);
-
- memcpy(pcpul_map[cpu].ptr, __per_cpu_load, static_size);
- }
-
- /* allocate address and map */
- pcpul_vm.flags = VM_ALLOC;
- pcpul_vm.size = nr_cpu_ids * PMD_SIZE;
- vm_area_register_early(&pcpul_vm, PMD_SIZE);
-
- for_each_possible_cpu(cpu) {
- pmd_t *pmd, pmd_v;
-
- pmd = populate_extra_pmd((unsigned long)pcpul_vm.addr +
- cpu * PMD_SIZE);
- pmd_v = pfn_pmd(page_to_pfn(virt_to_page(pcpul_map[cpu].ptr)),
- PAGE_KERNEL_LARGE);
- set_pmd(pmd, pmd_v);
- }
-
- /* we're ready, commit */
- pr_info("PERCPU: Remapped at %p with large pages, static data "
- "%zu bytes\n", pcpul_vm.addr, static_size);
-
- ret = pcpu_setup_first_chunk(pcpul_get_page, static_size,
- PERCPU_FIRST_CHUNK_RESERVE, dyn_size,
- PMD_SIZE, pcpul_vm.addr, NULL);
-
- /* sort pcpul_map array for pcpu_lpage_remapped() */
- for (i = 0; i < nr_cpu_ids - 1; i++)
- for (j = i + 1; j < nr_cpu_ids; j++)
- if (pcpul_map[i].ptr > pcpul_map[j].ptr) {
- struct pcpul_ent tmp = pcpul_map[i];
- pcpul_map[i] = pcpul_map[j];
- pcpul_map[j] = tmp;
- }
-
- return ret;
-
-enomem:
- for_each_possible_cpu(cpu)
- if (pcpul_map[cpu].ptr)
- free_bootmem(__pa(pcpul_map[cpu].ptr), pcpul_size);
- free_bootmem(__pa(pcpul_map), map_size);
- return -ENOMEM;
+ free_bootmem(__pa(ptr), size);
}
-/**
- * pcpu_lpage_remapped - determine whether a kaddr is in pcpul recycled area
- * @kaddr: the kernel address in question
- *
- * Determine whether @kaddr falls in the pcpul recycled area. This is
- * used by pageattr to detect VM aliases and break up the pcpu PMD
- * mapping such that the same physical page is not mapped under
- * different attributes.
- *
- * The recycled area is always at the tail of a partially used PMD
- * page.
- *
- * RETURNS:
- * Address of corresponding remapped pcpu address if match is found;
- * otherwise, NULL.
- */
-void *pcpu_lpage_remapped(void *kaddr)
+static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
{
- void *pmd_addr = (void *)((unsigned long)kaddr & PMD_MASK);
- unsigned long offset = (unsigned long)kaddr & ~PMD_MASK;
- int left = 0, right = nr_cpu_ids - 1;
- int pos;
-
- /* pcpul in use at all? */
- if (!pcpul_map)
- return NULL;
-
- /* okay, perform binary search */
- while (left <= right) {
- pos = (left + right) / 2;
-
- if (pcpul_map[pos].ptr < pmd_addr)
- left = pos + 1;
- else if (pcpul_map[pos].ptr > pmd_addr)
- right = pos - 1;
- else {
- /* it shouldn't be in the area for the first chunk */
- WARN_ON(offset < pcpul_size);
-
- return pcpul_vm.addr +
- pcpul_map[pos].cpu * PMD_SIZE + offset;
- }
- }
-
- return NULL;
-}
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+ if (early_cpu_to_node(from) == early_cpu_to_node(to))
+ return LOCAL_DISTANCE;
+ else
+ return REMOTE_DISTANCE;
#else
-static ssize_t __init setup_pcpu_lpage(size_t static_size, bool chosen)
-{
- return -EINVAL;
-}
+ return LOCAL_DISTANCE;
#endif
-
-/*
- * Embedding allocator
- *
- * The first chunk is sized to just contain the static area plus
- * module and dynamic reserves and embedded into linear physical
- * mapping so that it can use PMD mapping without additional TLB
- * pressure.
- */
-static ssize_t __init setup_pcpu_embed(size_t static_size, bool chosen)
-{
- size_t reserve = PERCPU_MODULE_RESERVE + PERCPU_DYNAMIC_RESERVE;
-
- /*
- * If large page isn't supported, there's no benefit in doing
- * this. Also, embedding allocation doesn't play well with
- * NUMA.
- */
- if (!chosen && (!cpu_has_pse || pcpu_need_numa()))
- return -EINVAL;
-
- return pcpu_embed_first_chunk(static_size, PERCPU_FIRST_CHUNK_RESERVE,
- reserve - PERCPU_FIRST_CHUNK_RESERVE, -1);
}
-/*
- * 4k page allocator
- *
- * This is the basic allocator. Static percpu area is allocated
- * page-by-page and most of initialization is done by the generic
- * setup function.
- */
-static struct page **pcpu4k_pages __initdata;
-static int pcpu4k_nr_static_pages __initdata;
-
-static struct page * __init pcpu4k_get_page(unsigned int cpu, int pageno)
-{
- if (pageno < pcpu4k_nr_static_pages)
- return pcpu4k_pages[cpu * pcpu4k_nr_static_pages + pageno];
- return NULL;
-}
-
-static void __init pcpu4k_populate_pte(unsigned long addr)
+static void __init pcpup_populate_pte(unsigned long addr)
{
populate_extra_pte(addr);
}
-static ssize_t __init setup_pcpu_4k(size_t static_size)
-{
- size_t pages_size;
- unsigned int cpu;
- int i, j;
- ssize_t ret;
-
- pcpu4k_nr_static_pages = PFN_UP(static_size);
-
- /* unaligned allocations can't be freed, round up to page size */
- pages_size = PFN_ALIGN(pcpu4k_nr_static_pages * nr_cpu_ids
- * sizeof(pcpu4k_pages[0]));
- pcpu4k_pages = alloc_bootmem(pages_size);
-
- /* allocate and copy */
- j = 0;
- for_each_possible_cpu(cpu)
- for (i = 0; i < pcpu4k_nr_static_pages; i++) {
- void *ptr;
-
- ptr = pcpu_alloc_bootmem(cpu, PAGE_SIZE, PAGE_SIZE);
- if (!ptr) {
- pr_warning("PERCPU: failed to allocate "
- "4k page for cpu%u\n", cpu);
- goto enomem;
- }
-
- memcpy(ptr, __per_cpu_load + i * PAGE_SIZE, PAGE_SIZE);
- pcpu4k_pages[j++] = virt_to_page(ptr);
- }
-
- /* we're ready, commit */
- pr_info("PERCPU: Allocated %d 4k pages, static data %zu bytes\n",
- pcpu4k_nr_static_pages, static_size);
-
- ret = pcpu_setup_first_chunk(pcpu4k_get_page, static_size,
- PERCPU_FIRST_CHUNK_RESERVE, -1,
- -1, NULL, pcpu4k_populate_pte);
- goto out_free_ar;
-
-enomem:
- while (--j >= 0)
- free_bootmem(__pa(page_address(pcpu4k_pages[j])), PAGE_SIZE);
- ret = -ENOMEM;
-out_free_ar:
- free_bootmem(__pa(pcpu4k_pages), pages_size);
- return ret;
-}
-
-/* for explicit first chunk allocator selection */
-static char pcpu_chosen_alloc[16] __initdata;
-
-static int __init percpu_alloc_setup(char *str)
-{
- strncpy(pcpu_chosen_alloc, str, sizeof(pcpu_chosen_alloc) - 1);
- return 0;
-}
-early_param("percpu_alloc", percpu_alloc_setup);
-
static inline void setup_percpu_segment(int cpu)
{
#ifdef CONFIG_X86_32
@@ -441,52 +170,49 @@ static inline void setup_percpu_segment(int cpu)
void __init setup_per_cpu_areas(void)
{
- size_t static_size = __per_cpu_end - __per_cpu_start;
unsigned int cpu;
unsigned long delta;
- size_t pcpu_unit_size;
- ssize_t ret;
+ int rc;
pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n",
NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids);
/*
- * Allocate percpu area. If PSE is supported, try to make use
- * of large page mappings. Please read comments on top of
- * each allocator for details.
+ * Allocate percpu area. Embedding allocator is our favorite;
+ * however, on NUMA configurations, it can result in very
+ * sparse unit mapping and vmalloc area isn't spacious enough
+ * on 32bit. Use page in that case.
*/
- ret = -EINVAL;
- if (strlen(pcpu_chosen_alloc)) {
- if (strcmp(pcpu_chosen_alloc, "4k")) {
- if (!strcmp(pcpu_chosen_alloc, "lpage"))
- ret = setup_pcpu_lpage(static_size, true);
- else if (!strcmp(pcpu_chosen_alloc, "embed"))
- ret = setup_pcpu_embed(static_size, true);
- else
- pr_warning("PERCPU: unknown allocator %s "
- "specified\n", pcpu_chosen_alloc);
- if (ret < 0)
- pr_warning("PERCPU: %s allocator failed (%zd), "
- "falling back to 4k\n",
- pcpu_chosen_alloc, ret);
- }
- } else {
- ret = setup_pcpu_lpage(static_size, false);
- if (ret < 0)
- ret = setup_pcpu_embed(static_size, false);
+#ifdef CONFIG_X86_32
+ if (pcpu_chosen_fc == PCPU_FC_AUTO && pcpu_need_numa())
+ pcpu_chosen_fc = PCPU_FC_PAGE;
+#endif
+ rc = -EINVAL;
+ if (pcpu_chosen_fc != PCPU_FC_PAGE) {
+ const size_t atom_size = cpu_has_pse ? PMD_SIZE : PAGE_SIZE;
+ const size_t dyn_size = PERCPU_MODULE_RESERVE +
+ PERCPU_DYNAMIC_RESERVE - PERCPU_FIRST_CHUNK_RESERVE;
+
+ rc = pcpu_embed_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
+ dyn_size, atom_size,
+ pcpu_cpu_distance,
+ pcpu_fc_alloc, pcpu_fc_free);
+ if (rc < 0)
+ pr_warning("PERCPU: %s allocator failed (%d), "
+ "falling back to page size\n",
+ pcpu_fc_names[pcpu_chosen_fc], rc);
}
- if (ret < 0)
- ret = setup_pcpu_4k(static_size);
- if (ret < 0)
- panic("cannot allocate static percpu area (%zu bytes, err=%zd)",
- static_size, ret);
-
- pcpu_unit_size = ret;
+ if (rc < 0)
+ rc = pcpu_page_first_chunk(PERCPU_FIRST_CHUNK_RESERVE,
+ pcpu_fc_alloc, pcpu_fc_free,
+ pcpup_populate_pte);
+ if (rc < 0)
+ panic("cannot initialize percpu area (err=%d)", rc);
/* alrighty, percpu areas up and running */
delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
for_each_possible_cpu(cpu) {
- per_cpu_offset(cpu) = delta + cpu * pcpu_unit_size;
+ per_cpu_offset(cpu) = delta + pcpu_unit_offsets[cpu];
per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
per_cpu(cpu_number, cpu) = cpu;
setup_percpu_segment(cpu);
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 9fc178255c04..0ccb57d5ee35 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -348,15 +348,12 @@ SECTIONS
_end = .;
}
- /* Sections to be discarded */
- /DISCARD/ : {
- *(.exitcall.exit)
- *(.eh_frame)
- *(.discard)
- }
-
STABS_DEBUG
DWARF_DEBUG
+
+ /* Sections to be discarded */
+ DISCARDS
+ /DISCARD/ : { *(.eh_frame) }
}
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index e245775ec856..24952fdc7e40 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -12,6 +12,7 @@
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/pfn.h>
+#include <linux/percpu.h>
#include <asm/e820.h>
#include <asm/processor.h>
@@ -686,7 +687,7 @@ static int cpa_process_alias(struct cpa_data *cpa)
{
struct cpa_data alias_cpa;
unsigned long laddr = (unsigned long)__va(cpa->pfn << PAGE_SHIFT);
- unsigned long vaddr, remapped;
+ unsigned long vaddr;
int ret;
if (cpa->pfn >= max_pfn_mapped)
@@ -744,24 +745,6 @@ static int cpa_process_alias(struct cpa_data *cpa)
}
#endif
- /*
- * If the PMD page was partially used for per-cpu remapping,
- * the recycled area needs to be split and modified. Because
- * the area is always proper subset of a PMD page
- * cpa->numpages is guaranteed to be 1 for these areas, so
- * there's no need to loop over and check for further remaps.
- */
- remapped = (unsigned long)pcpu_lpage_remapped((void *)laddr);
- if (remapped) {
- WARN_ON(cpa->numpages > 1);
- alias_cpa = *cpa;
- alias_cpa.vaddr = &remapped;
- alias_cpa.flags &= ~(CPA_PAGES_ARRAY | CPA_ARRAY);
- ret = __change_page_attr_set_clr(&alias_cpa, 0);
- if (ret)
- return ret;
- }
-
return 0;
}
diff --git a/arch/xtensa/kernel/vmlinux.lds.S b/arch/xtensa/kernel/vmlinux.lds.S
index 41c159cd872f..921b6ff3b645 100644
--- a/arch/xtensa/kernel/vmlinux.lds.S
+++ b/arch/xtensa/kernel/vmlinux.lds.S
@@ -280,15 +280,6 @@ SECTIONS
*(.ResetVector.text)
}
- /* Sections to be discarded */
- /DISCARD/ :
- {
- *(.exit.literal)
- EXIT_TEXT
- EXIT_DATA
- *(.exitcall.exit)
- }
-
.xt.lit : { *(.xt.lit) }
.xt.prop : { *(.xt.prop) }
@@ -321,4 +312,8 @@ SECTIONS
*(.xt.lit)
*(.gnu.linkonce.p*)
}
+
+ /* Sections to be discarded */
+ DISCARDS
+ /DISCARD/ : { *(.exit.literal) }
}