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authorBhanusree <bhanusreemahesh@gmail.com>2019-10-24 07:28:33 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2019-10-24 15:32:47 +0300
commit606be04724b6003bd00038c43eb9e1ae5e9c0993 (patch)
treef88b548fc8afe9461eb8bbd9edf721f30540e490
parent2ec35bd21d3290c8f76020dc60503deacd18e24b (diff)
downloadlinux-606be04724b6003bd00038c43eb9e1ae5e9c0993.tar.xz
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
-rw-r--r--drivers/gpu/drm/drm_cache.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
index 3bd76e918b5d..e574261f6bc3 100644
--- a/drivers/gpu/drm/drm_cache.c
+++ b/drivers/gpu/drm/drm_cache.c
@@ -62,10 +62,10 @@ static void drm_cache_flush_clflush(struct page *pages[],
{
unsigned long i;
- mb();
+ mb(); /*Full memory barrier used before so that CLFLUSH is ordered*/
for (i = 0; i < num_pages; i++)
drm_clflush_page(*pages++);
- mb();
+ mb(); /*Also used after CLFLUSH so that all cache is flushed*/
}
#endif