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percpu: update incorrect comment for this_cpu_*() operations

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this_cpu_*() ops have been protected against both preemption and
interrupts for quite a while now.  We apparently forgot to update the
comment.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux-foundation.org>
This commit is contained in:
Tejun Heo
2015-06-26 17:21:28 -04:00
parent d770e558e2
commit 83cb8557e8
1 changed files with 2 additions and 4 deletions
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include/linux/percpu-defs.h
+2 -4
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@@ -488,10 +488,8 @@ do { \
#define __this_cpu_dec_return(pcp) __this_cpu_add_return(pcp, -1) #define __this_cpu_dec_return(pcp) __this_cpu_add_return(pcp, -1)
/* /*
* Operations with implied preemption protection. These operations can be * Operations with implied preemption/interrupt protection. These
* used without worrying about preemption. Note that interrupts may still * operations can be used without worrying about preemption or interrupt.
* occur while an operation is in progress and if the interrupt modifies
* the variable too then RMW actions may not be reliable.
*/ */
#define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
#define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val)