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mm/page_alloc.c: micro-optimisation Remove unnecessary branch 

Previously if branch condition was false, the assignment was not executed.
The assignment can be safely executed even when the condition is false
and it is not incorrect as it assigns the value of 'nodemask' to
'ac.nodemask' which already has the same value.

So as the assignment can be executed unconditionally, the branch can be
removed.

Signed-off-by: Mateusz Nosek <mateusznosek0@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200307225335.31300-1-mateusznosek0@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mateusz Nosek 2020-04-01 21:09:53 -07:00 committed by Linus Torvalds
parent 76089d0082
commit 97ce86f93c
1 changed files with 1 additions and 2 deletions
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3
mm/page_alloc.c
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@ -4751,8 +4751,7 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid,
* Restore the original nodemask if it was potentially replaced with
* &cpuset_current_mems_allowed to optimize the fast-path attempt.
*/
if (unlikely(ac.nodemask != nodemask))
ac.nodemask = nodemask;
ac.nodemask = nodemask;
page = __alloc_pages_slowpath(alloc_mask, order, &ac);