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authorGeorge Spelvin <linux@sciencehorizons.net>2016-05-20 08:41:37 -0400
committerGeorge Spelvin <linux@sciencehorizons.net>2016-05-28 15:42:50 -0400
commitfcfd2fbf22d2587196890103d41e3d554c47da0e (patch)
treed8e67346881f72e06782c08305b88c8ce167b698 /fs/dcache.c
parentf4bcbe792b8f434e32487cff9d9e30ab45a3ce02 (diff)
downloadlinux-fcfd2fbf22d2587196890103d41e3d554c47da0e.tar.bz2
fs/namei.c: Add hashlen_string() function
We'd like to make more use of the highly-optimized dcache hash functions throughout the kernel, rather than have every subsystem create its own, and a function that hashes basic null-terminated strings is required for that. (The name is to emphasize that it returns both hash and length.) It's actually useful in the dcache itself, specifically d_alloc_name(). Other uses in the next patch. full_name_hash() is also tweaked to make it more generally useful: 1) Take a "char *" rather than "unsigned char *" argument, to be consistent with hash_name(). 2) Handle zero-length inputs. If we want more callers, we don't want to make them worry about corner cases. Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index d5ecc6e477da..19b751806789 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1653,8 +1653,7 @@ struct dentry *d_alloc_name(struct dentry *parent, const char *name)
struct qstr q;
q.name = name;
- q.len = strlen(name);
- q.hash = full_name_hash(q.name, q.len);
+ q.hash_len = hashlen_string(name);
return d_alloc(parent, &q);
}
EXPORT_SYMBOL(d_alloc_name);