AcoSail/kernel_optimize_test
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link_path_walk: end of nd->depth massage

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get rid of orig_depth - we only use it on error exit to tell whether
to stop doing put_link() when depth reaches 0 (call from path_init())
or when it reaches 1 (call from trailing_symlink()).  However, in
the latter case the caller would immediately follow with one more
put_link().  Just keep doing it until the depth reaches zero (and
simplify trailing_symlink() as the result).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-05-03 21:27:36 -04:00
parent 939724df56
commit 8eff733a45
1 changed files with 2 additions and 6 deletions
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8
fs/namei.c
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@ -1759,7 +1759,6 @@ static inline u64 hash_name(const char *name)
static int link_path_walk(const char *name, struct nameidata *nd)
{
int err;
int orig_depth = nd->depth;
while (*name=='/')
name++;
@ -1868,7 +1867,7 @@ static int link_path_walk(const char *name, struct nameidata *nd)
}
terminate_walk(nd);
Err:
while (unlikely(nd->depth > orig_depth))
while (unlikely(nd->depth))
put_link(nd);
return err;
OK:
@ -2017,10 +2016,7 @@ static int trailing_symlink(struct nameidata *nd)
}
nd->inode = nd->path.dentry->d_inode;
nd->stack[0].name = NULL;
error = link_path_walk(s, nd);
if (unlikely(error))
put_link(nd);
return error;
return link_path_walk(s, nd);
}
static inline int lookup_last(struct nameidata *nd)