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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-04 15:51:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-04 15:51:42 -0800
commit5483f18e986ed5267b923bec12b407845181350b (patch)
tree732959579f2439c5787c22250bfba5533a54232c /fs/dcache.c
parent192cfd58774b4d17b2fe8bdc77d89c2ef4e0591d (diff)
downloadlinux-5483f18e986ed5267b923bec12b407845181350b.tar.gz
vfs: move dentry_cmp from <linux/dcache.h> to fs/dcache.c
It's only used inside fs/dcache.c, and we're going to play games with it for the word-at-a-time patches. This time we really don't even want to export it, because it really is an internal function to fs/dcache.c, and has been since it was introduced. Having it in that extremely hot header file (it's included in pretty much everything, thanks to <linux/fs.h>) is a disaster for testing different versions, and is utterly pointless. We really should have some kind of header file diet thing, where we figure out which parts of header files are really better off private and only result in more expensive compiles. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 138be96e25b..bcbdb33fcc2 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -137,6 +137,26 @@ int proc_nr_dentry(ctl_table *table, int write, void __user *buffer,
}
#endif
+/*
+ * Compare 2 name strings, return 0 if they match, otherwise non-zero.
+ * The strings are both count bytes long, and count is non-zero.
+ */
+static inline int dentry_cmp(const unsigned char *cs, size_t scount,
+ const unsigned char *ct, size_t tcount)
+{
+ if (scount != tcount)
+ return 1;
+
+ do {
+ if (*cs != *ct)
+ return 1;
+ cs++;
+ ct++;
+ tcount--;
+ } while (tcount);
+ return 0;
+}
+
static void __d_free(struct rcu_head *head)
{
struct dentry *dentry = container_of(head, struct dentry, d_u.d_rcu);