The patch titled
Subject: mm/page_alloc.c: micro-optimisation Remove unnecessary branch
has been removed from the -mm tree. Its filename was
mm-page_allocc-micro-optimisation-remove-unnecessary-branch.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Mateusz Nosek <mateusznosek0@xxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/20200307225335.31300-1-mateusznosek0@xxxxxxxxx
Signed-off-by: Mateusz Nosek <mateusznosek0@xxxxxxxxx>
Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/mm/page_alloc.c~mm-page_allocc-micro-optimisation-remove-unnecessary-branch
+++ a/mm/page_alloc.c
@@ -4751,8 +4751,7 @@ __alloc_pages_nodemask(gfp_t gfp_mask, u
* 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);
_
Patches currently in -mm which might be from mateusznosek0@xxxxxxxxx are
mm-shmemc-clean-code-by-removing-unnecessary-assignment.patch
mm-mm_initc-clean-code-use-build_bug_on-when-comparing-compile-time-constant.patch
mm-dmapoolc-micro-optimisation-remove-unnecessary-branch.patch
