[PATCH] map multiple blocks for mpage_readpages()

This patch changes mpage_readpages() and get_block() to get the disk mapping
information for multiple blocks at the same time.

b_size represents the amount of disk mapping that needs to mapped.  On the
successful get_block() b_size indicates the amount of disk mapping thats
actually mapped.  Only the filesystems who care to use this information and
provide multiple disk blocks at a time can choose to do so.

No changes are needed for the filesystems who wants to ignore this.

[akpm@osdl.org: cleanups]
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 51a5fed90cca..7239ef339489 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -258,7 +258,8 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,
 static int jfs_get_block(struct inode *ip, sector_t lblock,
                          struct buffer_head *bh_result, int create)
 {
-        return jfs_get_blocks(ip, lblock, 1, bh_result, create);
+        return jfs_get_blocks(ip, lblock, bh_result->b_size >> ip->i_blkbits,
+                        bh_result, create);
 }
 
 static int jfs_writepage(struct page *page, struct writeback_control *wbc)