-Add comment for memory barrier
-Issue found using checkpatch.pl
Signed-off-by: Bhanusree <[email protected]>
---
v2:modified memory barrier comments appropriately
drivers/gpu/drm/drm_cache.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c
index 3bd76e9..e574261 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
--
2.7.4
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