drm/gpu: Fix Memory barrier without comment Issue (c6a5f8da) · Commits · 戴 / test

-Issue found using checkpatch.pl -Insert comments for memory barrier usage Signed-off-by:

drivers/gpu/drm/drm_cache.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -126,10 +126,10 @@ drm_clflush_sg(struct sg_table *st)
		if (static_cpu_has(X86_FEATURE_CLFLUSH)) {
		struct sg_page_iter sg_iter;

		mb();
		mb(); /CLFLUSH is ordered only by using memory barriers/
		for_each_sg_page(st->sgl, &sg_iter, st->nents, 0)
		drm_clflush_page(sg_page_iter_page(&sg_iter));
		mb();
		mb(); /Make sure that all cache line entry is flushed/

		return;
		}
		@@ -160,11 +160,11 @@ drm_clflush_virt_range(void *addr, unsigned long length)
		void *end = addr + length;

		addr = (void *)(((unsigned long)addr) & -size);
		mb();
		mb(); /CLFLUSH is only ordered with a full memory barrier/
		for (; addr < end; addr += size)
		clflushopt(addr);
		clflushopt(end - 1); /* force serialisation */
		mb();
		mb(); /Ensure that evry data cache line entry is flushed/
		return;
		}