[PATCH] reiserfs: add missing D-cache flushing

Looks like, reiserfs_prepare_file_region_for_write() doesn't contain
several flush_dcache_page() calls.

Found with help from Dmitriy Monakhov <dmonakhov@openvz.org>

[akpm@osdl.org: small speedup]
Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Cc: Dmitriy Monakhov <dmonakhov@openvz.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index ac14318c81ba..6526498949d8 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -1045,6 +1045,7 @@ static int reiserfs_prepare_file_region_for_write(struct inode *inode
                         char *kaddr = kmap_atomic(prepared_pages[0], KM_USER0);
                         memset(kaddr, 0, from);
                         kunmap_atomic(kaddr, KM_USER0);
+                        flush_dcache_page(prepared_pages[0]);
                 }
                 if (to != PAGE_CACHE_SIZE) {    /* Last page needs to be partially zeroed */
                         char *kaddr =
@@ -1052,6 +1053,7 @@ static int reiserfs_prepare_file_region_for_write(struct inode *inode
                                         KM_USER0);
                         memset(kaddr + to, 0, PAGE_CACHE_SIZE - to);
                         kunmap_atomic(kaddr, KM_USER0);
+                        flush_dcache_page(prepared_pages[num_pages - 1]);
                 }
 
                 /* Since all blocks are new - use already calculated value */
@@ -1185,6 +1187,7 @@ static int reiserfs_prepare_file_region_for_write(struct inode *inode
                                         memset(kaddr + block_start, 0,
                                                from - block_start);
                                         kunmap_atomic(kaddr, KM_USER0);
+                                        flush_dcache_page(prepared_pages[0]);
                                         set_buffer_uptodate(bh);
                                 }
                         }
@@ -1222,6 +1225,7 @@ static int reiserfs_prepare_file_region_for_write(struct inode *inode
                                                         KM_USER0);
                                         memset(kaddr + to, 0, block_end - to);
                                         kunmap_atomic(kaddr, KM_USER0);
+                                        flush_dcache_page(prepared_pages[num_pages - 1]);
                                         set_buffer_uptodate(bh);
                                 }
                         }