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[4/6] scatterlist: replace flush_kernel_dcache_page with flush_dcache_page

Message ID 20210712060928.4161649-5-hch@lst.de
State New
Headers show
Series [1/6] mmc: JZ4740: remove the flush_kernel_dcache_page call in jz4740_mmc_read_data | expand

Commit Message

Christoph Hellwig July 12, 2021, 6:09 a.m. UTC 
Pages used in scatterlist can be mapped page cache pages (and often are),
so we must use flush_dcache_page here instead of the more limited
flush_kernel_dcache_page that is intended for highmem pages only.

Also remove the PageSlab check given that page_mapping_file as used
by the flush_dcache_page implementations already contains that check.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 lib/scatterlist.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 27efa6178153..627aa84f8bbd 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -887,9 +887,8 @@  void sg_miter_stop(struct sg_mapping_iter *miter)
 		miter->__offset += miter->consumed;
 		miter->__remaining -= miter->consumed;
 
-		if ((miter->__flags & SG_MITER_TO_SG) &&
-		    !PageSlab(miter->page))
-			flush_kernel_dcache_page(miter->page);
+		if (miter->__flags & SG_MITER_TO_SG)
+			flush_dcache_page(miter->page);
 
 		if (miter->__flags & SG_MITER_ATOMIC) {
 			WARN_ON_ONCE(preemptible());