vfs: move dentry name length comparison from dentry_cmp() into callers
All callers do want to check the dentry length, but some of them can
check the length and the hash together, so doing it in dentry_cmp() can
be counter-productive.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/dcache.c b/fs/dcache.c
index 5c09ad7..e6707a1 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -192,9 +192,6 @@
static inline int dentry_cmp(const struct dentry *dentry, const unsigned char *ct, unsigned tcount)
{
- if (dentry->d_name.len != tcount)
- return 1;
-
/*
* Be careful about RCU walk racing with rename:
* use ACCESS_ONCE to fetch the name pointer.
@@ -1464,6 +1461,8 @@
continue;
if (alias->d_parent != entry->d_parent)
continue;
+ if (alias->d_name.len != len)
+ continue;
if (dentry_cmp(alias, name, len))
continue;
__dget(alias);
@@ -1882,6 +1881,8 @@
}
}
+ if (dentry->d_name.len != len)
+ continue;
if (!dentry_cmp(dentry, str, len))
return dentry;
}
@@ -1984,6 +1985,8 @@
tlen, tname, name))
goto next;
} else {
+ if (dentry->d_name.len != len)
+ goto next;
if (dentry_cmp(dentry, str, len))
goto next;
}
