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authorIngo Molnar <mingo@kernel.org>2016-07-27 12:35:35 +0200
committerIngo Molnar <mingo@kernel.org>2016-07-27 12:35:35 +0200
commitdf15929f8f5c69e987c31bf016eca4a38dba46f0 (patch)
treecfb5fe5e8ebff4cabd70557a304f355546943cc9 /lib
parentefaad554b4ffae1840a2759e09e21325ddbc8b05 (diff)
parent37e13a1ebe32c4fbfbdb5413f42eb6e71d8b28a4 (diff)
downloadlinux-stericsson-df15929f8f5c69e987c31bf016eca4a38dba46f0.tar.gz
Merge branch 'linus' into x86/microcode, to pick up merge window changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug33
-rw-r--r--lib/Makefile5
-rw-r--r--lib/atomic64.c32
-rw-r--r--lib/atomic64_test.c34
-rw-r--r--lib/bitmap.c2
-rw-r--r--lib/hweight.c4
-rw-r--r--lib/random32.c1
7 files changed, 67 insertions, 44 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index b9cfdbfae9aa..805b7048a1bd 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1307,22 +1307,6 @@ config RCU_PERF_TEST
Say M if you want the RCU performance tests to build as a module.
Say N if you are unsure.
-config RCU_PERF_TEST_RUNNABLE
- bool "performance tests for RCU runnable by default"
- depends on RCU_PERF_TEST = y
- default n
- help
- This option provides a way to build the RCU performance tests
- directly into the kernel without them starting up at boot time.
- You can use /sys/module to manually override this setting.
- This /proc file is available only when the RCU performance
- tests have been built into the kernel.
-
- Say Y here if you want the RCU performance tests to start during
- boot (you probably don't).
- Say N here if you want the RCU performance tests to start only
- after being manually enabled via /sys/module.
-
config RCU_TORTURE_TEST
tristate "torture tests for RCU"
depends on DEBUG_KERNEL
@@ -1340,23 +1324,6 @@ config RCU_TORTURE_TEST
Say M if you want the RCU torture tests to build as a module.
Say N if you are unsure.
-config RCU_TORTURE_TEST_RUNNABLE
- bool "torture tests for RCU runnable by default"
- depends on RCU_TORTURE_TEST = y
- default n
- help
- This option provides a way to build the RCU torture tests
- directly into the kernel without them starting up at boot
- time. You can use /proc/sys/kernel/rcutorture_runnable
- to manually override this setting. This /proc file is
- available only when the RCU torture tests have been built
- into the kernel.
-
- Say Y here if you want the RCU torture tests to start during
- boot (you probably don't).
- Say N here if you want the RCU torture tests to start only
- after being manually enabled via /proc.
-
config RCU_TORTURE_TEST_SLOW_PREINIT
bool "Slow down RCU grace-period pre-initialization to expose races"
depends on RCU_TORTURE_TEST
diff --git a/lib/Makefile b/lib/Makefile
index ff6a7a6c6395..07d06a8b9788 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -15,9 +15,6 @@ KCOV_INSTRUMENT_rbtree.o := n
KCOV_INSTRUMENT_list_debug.o := n
KCOV_INSTRUMENT_debugobjects.o := n
KCOV_INSTRUMENT_dynamic_debug.o := n
-# Kernel does not boot if we instrument this file as it uses custom calling
-# convention (see CONFIG_ARCH_HWEIGHT_CFLAGS).
-KCOV_INSTRUMENT_hweight.o := n
lib-y := ctype.o string.o vsprintf.o cmdline.o \
rbtree.o radix-tree.o dump_stack.o timerqueue.o\
@@ -74,8 +71,6 @@ obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
-GCOV_PROFILE_hweight.o := n
-CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS))
obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
obj-$(CONFIG_BTREE) += btree.o
diff --git a/lib/atomic64.c b/lib/atomic64.c
index 2886ebac6567..53c2d5edc826 100644
--- a/lib/atomic64.c
+++ b/lib/atomic64.c
@@ -96,17 +96,41 @@ long long atomic64_##op##_return(long long a, atomic64_t *v) \
} \
EXPORT_SYMBOL(atomic64_##op##_return);
+#define ATOMIC64_FETCH_OP(op, c_op) \
+long long atomic64_fetch_##op(long long a, atomic64_t *v) \
+{ \
+ unsigned long flags; \
+ raw_spinlock_t *lock = lock_addr(v); \
+ long long val; \
+ \
+ raw_spin_lock_irqsave(lock, flags); \
+ val = v->counter; \
+ v->counter c_op a; \
+ raw_spin_unlock_irqrestore(lock, flags); \
+ return val; \
+} \
+EXPORT_SYMBOL(atomic64_fetch_##op);
+
#define ATOMIC64_OPS(op, c_op) \
ATOMIC64_OP(op, c_op) \
- ATOMIC64_OP_RETURN(op, c_op)
+ ATOMIC64_OP_RETURN(op, c_op) \
+ ATOMIC64_FETCH_OP(op, c_op)
ATOMIC64_OPS(add, +=)
ATOMIC64_OPS(sub, -=)
-ATOMIC64_OP(and, &=)
-ATOMIC64_OP(or, |=)
-ATOMIC64_OP(xor, ^=)
#undef ATOMIC64_OPS
+#define ATOMIC64_OPS(op, c_op) \
+ ATOMIC64_OP(op, c_op) \
+ ATOMIC64_OP_RETURN(op, c_op) \
+ ATOMIC64_FETCH_OP(op, c_op)
+
+ATOMIC64_OPS(and, &=)
+ATOMIC64_OPS(or, |=)
+ATOMIC64_OPS(xor, ^=)
+
+#undef ATOMIC64_OPS
+#undef ATOMIC64_FETCH_OP
#undef ATOMIC64_OP_RETURN
#undef ATOMIC64_OP
diff --git a/lib/atomic64_test.c b/lib/atomic64_test.c
index 123481814320..dbb369145dda 100644
--- a/lib/atomic64_test.c
+++ b/lib/atomic64_test.c
@@ -53,11 +53,25 @@ do { \
BUG_ON(atomic##bit##_read(&v) != r); \
} while (0)
+#define TEST_FETCH(bit, op, c_op, val) \
+do { \
+ atomic##bit##_set(&v, v0); \
+ r = v0; \
+ r c_op val; \
+ BUG_ON(atomic##bit##_##op(val, &v) != v0); \
+ BUG_ON(atomic##bit##_read(&v) != r); \
+} while (0)
+
#define RETURN_FAMILY_TEST(bit, op, c_op, val) \
do { \
FAMILY_TEST(TEST_RETURN, bit, op, c_op, val); \
} while (0)
+#define FETCH_FAMILY_TEST(bit, op, c_op, val) \
+do { \
+ FAMILY_TEST(TEST_FETCH, bit, op, c_op, val); \
+} while (0)
+
#define TEST_ARGS(bit, op, init, ret, expect, args...) \
do { \
atomic##bit##_set(&v, init); \
@@ -114,6 +128,16 @@ static __init void test_atomic(void)
RETURN_FAMILY_TEST(, sub_return, -=, onestwos);
RETURN_FAMILY_TEST(, sub_return, -=, -one);
+ FETCH_FAMILY_TEST(, fetch_add, +=, onestwos);
+ FETCH_FAMILY_TEST(, fetch_add, +=, -one);
+ FETCH_FAMILY_TEST(, fetch_sub, -=, onestwos);
+ FETCH_FAMILY_TEST(, fetch_sub, -=, -one);
+
+ FETCH_FAMILY_TEST(, fetch_or, |=, v1);
+ FETCH_FAMILY_TEST(, fetch_and, &=, v1);
+ FETCH_FAMILY_TEST(, fetch_andnot, &= ~, v1);
+ FETCH_FAMILY_TEST(, fetch_xor, ^=, v1);
+
INC_RETURN_FAMILY_TEST(, v0);
DEC_RETURN_FAMILY_TEST(, v0);
@@ -154,6 +178,16 @@ static __init void test_atomic64(void)
RETURN_FAMILY_TEST(64, sub_return, -=, onestwos);
RETURN_FAMILY_TEST(64, sub_return, -=, -one);
+ FETCH_FAMILY_TEST(64, fetch_add, +=, onestwos);
+ FETCH_FAMILY_TEST(64, fetch_add, +=, -one);
+ FETCH_FAMILY_TEST(64, fetch_sub, -=, onestwos);
+ FETCH_FAMILY_TEST(64, fetch_sub, -=, -one);
+
+ FETCH_FAMILY_TEST(64, fetch_or, |=, v1);
+ FETCH_FAMILY_TEST(64, fetch_and, &=, v1);
+ FETCH_FAMILY_TEST(64, fetch_andnot, &= ~, v1);
+ FETCH_FAMILY_TEST(64, fetch_xor, ^=, v1);
+
INIT(v0);
atomic64_inc(&v);
r += one;
diff --git a/lib/bitmap.c b/lib/bitmap.c
index c66da508cbf7..eca88087fa8a 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -14,9 +14,9 @@
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/string.h>
+#include <linux/uaccess.h>
#include <asm/page.h>
-#include <asm/uaccess.h>
/*
* bitmaps provide an array of bits, implemented using an an
diff --git a/lib/hweight.c b/lib/hweight.c
index 9a5c1f221558..43273a7d83cf 100644
--- a/lib/hweight.c
+++ b/lib/hweight.c
@@ -9,6 +9,7 @@
* The Hamming Weight of a number is the total number of bits set in it.
*/
+#ifndef __HAVE_ARCH_SW_HWEIGHT
unsigned int __sw_hweight32(unsigned int w)
{
#ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER
@@ -25,6 +26,7 @@ unsigned int __sw_hweight32(unsigned int w)
#endif
}
EXPORT_SYMBOL(__sw_hweight32);
+#endif
unsigned int __sw_hweight16(unsigned int w)
{
@@ -43,6 +45,7 @@ unsigned int __sw_hweight8(unsigned int w)
}
EXPORT_SYMBOL(__sw_hweight8);
+#ifndef __HAVE_ARCH_SW_HWEIGHT
unsigned long __sw_hweight64(__u64 w)
{
#if BITS_PER_LONG == 32
@@ -65,3 +68,4 @@ unsigned long __sw_hweight64(__u64 w)
#endif
}
EXPORT_SYMBOL(__sw_hweight64);
+#endif
diff --git a/lib/random32.c b/lib/random32.c
index 510d1ce7d4d2..69ed593aab07 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -233,7 +233,6 @@ static void __prandom_timer(unsigned long dontcare)
static void __init __prandom_start_seed_timer(void)
{
- set_timer_slack(&seed_timer, HZ);
seed_timer.expires = jiffies + msecs_to_jiffies(40 * MSEC_PER_SEC);
add_timer(&seed_timer);
}