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[PATCH] map multiple blocks for mpage_readpages()

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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>
This commit is contained in:
Badari Pulavarty 2006-03-26 01:38:01 -08:00 • committed by Linus Torvalds
parent b0cf2321c6
commit fa30bd058b
3 changed files with 90 additions and 22 deletions
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3
fs/jfs/inode.c
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@ -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)