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Subject[PATCH] mm: D-cache flushing was forgotten
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Date
Here is a patch that add D-cache flushing  routine
after page was changed. It is forgotten in current code.

David Miller agree with patch.

Signed-off-by: Dmitriy Monakhov <dmonakhov@openvz.org>

diff --git a/fs/buffer.c b/fs/buffer.c
index 71649ef..b2652aa 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2008,6 +2008,7 @@ static int __block_prepare_write(struct
clear_buffer_new(bh);
kaddr = kmap_atomic(page, KM_USER0);
memset(kaddr+block_start, 0, bh->b_size);
+ flush_dcache_page(page);
kunmap_atomic(kaddr, KM_USER0);
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
@@ -2514,6 +2515,7 @@ failed:
*/
kaddr = kmap_atomic(page, KM_USER0);
memset(kaddr, 0, PAGE_CACHE_SIZE);
+ flush_dcache_page(page);
kunmap_atomic(kaddr, KM_USER0);
SetPageUptodate(page);
set_page_dirty(page);
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