Commit 57979fab authored by Roman Gushchin's avatar Roman Gushchin Committed by Andrew Morton
Browse files

mm: page_counters: initialize usage using ATOMIC_LONG_INIT() macro 

When a page_counter structure is initialized, there is no need to use an
atomic set operation to initialize the usage counter because at this point
the structure is not visible to anybody else.  ATOMIC_LONG_INIT() is what
should be used in such cases.

Link: https://lkml.kernel.org/r/20240726203110.1577216-4-roman.gushchin@linux.dev


Signed-off-by: default avatarRoman Gushchin <roman.gushchin@linux.dev>
Acked-by: default avatarShakeel Butt <shakeel.butt@linux.dev>
Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 941ce635

include/linux/page_counter.h

+1 −1
Original line number Diff line number Diff line
@@ -52,7 +52,7 @@ static inline void page_counter_init(struct page_counter *counter, 
				     struct page_counter *parent,

				     bool protection_support)

{

	atomic_long_set(&counter->usage, 0);

	counter->usage = (atomic_long_t)ATOMIC_LONG_INIT(0);

	counter->max = PAGE_COUNTER_MAX;

	counter->parent = parent;

	counter->protection_support = protection_support;