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drm/gpu: Add comment for memory barrier 

-Add comment for memory barrier
-Issue found using checkpatch.pl

Signed-off-by: Bhanusree <bhanusreemahesh@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1571891313-14341-1-git-send-email-bhanusreemahesh@gmail.com
This commit is contained in:
Bhanusree 2019-10-24 09:58:33 +05:30 committed by Daniel Vetter
parent 2ec35bd21d
commit 606be04724
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/drm_cache.c
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@ -62,10 +62,10 @@ static void drm_cache_flush_clflush(struct page *pages[],
{ {
unsigned long i; unsigned long i;
mb(); mb(); /*Full memory barrier used before so that CLFLUSH is ordered*/
for (i = 0; i < num_pages; i++) for (i = 0; i < num_pages; i++)
drm_clflush_page(*pages++); drm_clflush_page(*pages++);
mb(); mb(); /*Also used after CLFLUSH so that all cache is flushed*/
} }
#endif #endif