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Commit 83cb8557 authored by Tejun Heo's avatar Tejun Heo
Browse files

percpu: update incorrect comment for this_cpu_*() operations 



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: default avatarTejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux-foundation.org>
parent d770e558

include/linux/percpu-defs.h

+2 −4
Original line number Diff line number Diff line
@@ -488,10 +488,8 @@ do { \ 
#define __this_cpu_dec_return(pcp)	__this_cpu_add_return(pcp, -1)



/*

 * Operations with implied preemption protection.  These operations can be

 * used without worrying about preemption.  Note that interrupts may still

 * occur while an operation is in progress and if the interrupt modifies

 * the variable too then RMW actions may not be reliable.

 * Operations with implied preemption/interrupt protection.  These

 * operations can be used without worrying about preemption or interrupt.

 */

#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)