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mbcache: Remove unused features

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The mbcache code was written to support a variable number of indexes,
but all the existing users use exactly one index.  Simplify to code to
support only that case.

There are also no users of the cache entry free operation, and none of
the users keep extra data in cache entries.  Remove those features as
well.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Andreas Gruenbacher
2010-07-19 18:19:41 +02:00
committed by Al Viro
parent 365b181897
commit 2aec7c5232
5 changed files with 60 additions and 137 deletions
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12
fs/ext2/xattr.c
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@@ -843,7 +843,7 @@ ext2_xattr_cache_insert(struct buffer_head *bh)
ce = mb_cache_entry_alloc(ext2_xattr_cache, GFP_NOFS);
if (!ce)
return -ENOMEM;
error = mb_cache_entry_insert(ce, bh->b_bdev, bh->b_blocknr, &hash);
error = mb_cache_entry_insert(ce, bh->b_bdev, bh->b_blocknr, hash);
if (error) {
mb_cache_entry_free(ce);
if (error == -EBUSY) {
@@ -917,8 +917,8 @@ ext2_xattr_cache_find(struct inode *inode, struct ext2_xattr_header *header)
return NULL; /* never share */
ea_idebug(inode, "looking for cached blocks [%x]", (int)hash);
again:
ce = mb_cache_entry_find_first(ext2_xattr_cache, 0,
inode->i_sb->s_bdev, hash);
ce = mb_cache_entry_find_first(ext2_xattr_cache, inode->i_sb->s_bdev,
hash);
while (ce) {
struct buffer_head *bh;
@@ -950,7 +950,7 @@ again:
unlock_buffer(bh);
brelse(bh);
}
ce = mb_cache_entry_find_next(ce, 0, inode->i_sb->s_bdev, hash);
ce = mb_cache_entry_find_next(ce, inode->i_sb->s_bdev, hash);
}
return NULL;
}
@@ -1026,9 +1026,7 @@ static void ext2_xattr_rehash(struct ext2_xattr_header *header,
int __init
init_ext2_xattr(void)
{
ext2_xattr_cache = mb_cache_create("ext2_xattr", NULL,
sizeof(struct mb_cache_entry) +
sizeof(((struct mb_cache_entry *) 0)->e_indexes[0]), 1, 6);
ext2_xattr_cache = mb_cache_create("ext2_xattr", 6);
if (!ext2_xattr_cache)
return -ENOMEM;
return 0;