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authorAl Viro <viro@zeniv.linux.org.uk>2011-09-16 02:31:11 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-01-03 22:54:07 -0500
commitff01bb4832651c6d25ac509a06a10fcbd75c461c (patch)
treebbfdebd317db97d346df78293566f36e883b1be9 /fs/block_dev.c
parent94ea4158f1733e3b10cef067d535f504866e0c41 (diff)
downloadlwn-ff01bb4832651c6d25ac509a06a10fcbd75c461c.tar.gz
lwn-ff01bb4832651c6d25ac509a06a10fcbd75c461c.zip
fs: move code out of buffer.c
Move invalidate_bdev, block_sync_page into fs/block_dev.c. Export kill_bdev as well, so brd doesn't have to open code it. Reduce buffer_head.h requirement accordingly. Removed a rather large comment from invalidate_bdev, as it looked a bit obsolete to bother moving. The small comment replacing it says enough. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c30
1 files changed, 27 insertions, 3 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 7866cdd9fe70..69a5b6fbee2b 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/blkpg.h>
#include <linux/buffer_head.h>
+#include <linux/swap.h>
#include <linux/pagevec.h>
#include <linux/writeback.h>
#include <linux/mpage.h>
@@ -25,6 +26,7 @@
#include <linux/namei.h>
#include <linux/log2.h>
#include <linux/kmemleak.h>
+#include <linux/cleancache.h>
#include <asm/uaccess.h>
#include "internal.h"
@@ -82,13 +84,35 @@ static sector_t max_block(struct block_device *bdev)
}
/* Kill _all_ buffers and pagecache , dirty or not.. */
-static void kill_bdev(struct block_device *bdev)
+void kill_bdev(struct block_device *bdev)
{
- if (bdev->bd_inode->i_mapping->nrpages == 0)
+ struct address_space *mapping = bdev->bd_inode->i_mapping;
+
+ if (mapping->nrpages == 0)
return;
+
invalidate_bh_lrus();
- truncate_inode_pages(bdev->bd_inode->i_mapping, 0);
+ truncate_inode_pages(mapping, 0);
}
+EXPORT_SYMBOL(kill_bdev);
+
+/* Invalidate clean unused buffers and pagecache. */
+void invalidate_bdev(struct block_device *bdev)
+{
+ struct address_space *mapping = bdev->bd_inode->i_mapping;
+
+ if (mapping->nrpages == 0)
+ return;
+
+ invalidate_bh_lrus();
+ lru_add_drain_all(); /* make sure all lru add caches are flushed */
+ invalidate_mapping_pages(mapping, 0, -1);
+ /* 99% of the time, we don't need to flush the cleancache on the bdev.
+ * But, for the strange corners, lets be cautious
+ */
+ cleancache_flush_inode(mapping);
+}
+EXPORT_SYMBOL(invalidate_bdev);
int set_blocksize(struct block_device *bdev, int size)
{