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authorLinus Torvalds <torvalds@linux-foundation.org>2013-10-30 14:27:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-10-30 14:27:10 -0700
commit12aee278b50c4a94a93fa0b4d201ae35d792c696 (patch)
tree98c0c42c9095aae34d12a4b8c555176698b7202a
parentc56b097af26cb11c1f49a4311ba538c825666fed (diff)
parent5e8cfc3c75b3e43497389896c0ecda62fc311ce9 (diff)
downloadlinux-12aee278b50c4a94a93fa0b4d201ae35d792c696.tar.gz
Merge branch 'akpm' (fixes from Andrew Morton)
Merge three fixes from Andrew Morton. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: memcg: use __this_cpu_sub() to dec stats to avoid incorrect subtrahend casting percpu: fix this_cpu_sub() subtrahend casting for unsigneds mm/pagewalk.c: fix walk_page_range() access of wrong PTEs
-rw-r--r--arch/x86/include/asm/percpu.h3
-rw-r--r--include/linux/percpu.h8
-rw-r--r--mm/memcontrol.c2
-rw-r--r--mm/pagewalk.c2
4 files changed, 8 insertions, 7 deletions
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 0da5200ee79..b3e18f80030 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -128,7 +128,8 @@ do { \
do { \
typedef typeof(var) pao_T__; \
const int pao_ID__ = (__builtin_constant_p(val) && \
- ((val) == 1 || (val) == -1)) ? (val) : 0; \
+ ((val) == 1 || (val) == -1)) ? \
+ (int)(val) : 0; \
if (0) { \
pao_T__ pao_tmp__; \
pao_tmp__ = (val); \
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index cc88172c7d9..c74088ab103 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -332,7 +332,7 @@ do { \
#endif
#ifndef this_cpu_sub
-# define this_cpu_sub(pcp, val) this_cpu_add((pcp), -(val))
+# define this_cpu_sub(pcp, val) this_cpu_add((pcp), -(typeof(pcp))(val))
#endif
#ifndef this_cpu_inc
@@ -418,7 +418,7 @@ do { \
# define this_cpu_add_return(pcp, val) __pcpu_size_call_return2(this_cpu_add_return_, pcp, val)
#endif
-#define this_cpu_sub_return(pcp, val) this_cpu_add_return(pcp, -(val))
+#define this_cpu_sub_return(pcp, val) this_cpu_add_return(pcp, -(typeof(pcp))(val))
#define this_cpu_inc_return(pcp) this_cpu_add_return(pcp, 1)
#define this_cpu_dec_return(pcp) this_cpu_add_return(pcp, -1)
@@ -586,7 +586,7 @@ do { \
#endif
#ifndef __this_cpu_sub
-# define __this_cpu_sub(pcp, val) __this_cpu_add((pcp), -(val))
+# define __this_cpu_sub(pcp, val) __this_cpu_add((pcp), -(typeof(pcp))(val))
#endif
#ifndef __this_cpu_inc
@@ -668,7 +668,7 @@ do { \
__pcpu_size_call_return2(__this_cpu_add_return_, pcp, val)
#endif
-#define __this_cpu_sub_return(pcp, val) __this_cpu_add_return(pcp, -(val))
+#define __this_cpu_sub_return(pcp, val) __this_cpu_add_return(pcp, -(typeof(pcp))(val))
#define __this_cpu_inc_return(pcp) __this_cpu_add_return(pcp, 1)
#define __this_cpu_dec_return(pcp) __this_cpu_add_return(pcp, -1)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 34d3ca9572d..497ec33ff22 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3774,7 +3774,7 @@ void mem_cgroup_move_account_page_stat(struct mem_cgroup *from,
/* Update stat data for mem_cgroup */
preempt_disable();
WARN_ON_ONCE(from->stat->count[idx] < nr_pages);
- __this_cpu_add(from->stat->count[idx], -nr_pages);
+ __this_cpu_sub(from->stat->count[idx], nr_pages);
__this_cpu_add(to->stat->count[idx], nr_pages);
preempt_enable();
}
diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index 5da2cbcfdbb..2beeabf502c 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -242,7 +242,7 @@ int walk_page_range(unsigned long addr, unsigned long end,
if (err)
break;
pgd++;
- } while (addr = next, addr != end);
+ } while (addr = next, addr < end);
return err;
}