diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-06-10 07:51:30 -0700 |
---|---|---|
committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-07-16 07:22:13 +0200 |
commit | 0ec9bbce63581ce9e2b9bf0fd7ab5ba7e1d9b7a1 (patch) | |
tree | 4ccd0b872d48ebb9e9c5491142a1e92efc726331 /cpukit/libfs/src/jffs2/src/os-rtems.h | |
parent | mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros (diff) | |
download | rtems-0ec9bbce63581ce9e2b9bf0fd7ab5ba7e1d9b7a1.tar.bz2 |
vfs: make the string hashes salt the hash
We always mixed in the parent pointer into the dentry name hash, but we
did it late at lookup time. It turns out that we can simplify that
lookup-time action by salting the hash with the parent pointer early
instead of late.
A few other users of our string hashes also wanted to mix in their own
pointers into the hash, and those are updated to use the same mechanism.
Hash users that don't have any particular initial salt can just use the
NULL pointer as a no-salt.
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: George Spelvin <linux@sciencehorizons.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r-- | cpukit/libfs/src/jffs2/src/os-rtems.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/cpukit/libfs/src/jffs2/src/os-rtems.h b/cpukit/libfs/src/jffs2/src/os-rtems.h index ab4f6d72bf..db1be61e67 100644 --- a/cpukit/libfs/src/jffs2/src/os-rtems.h +++ b/cpukit/libfs/src/jffs2/src/os-rtems.h @@ -41,9 +41,10 @@ struct _inode; struct super_block; -static inline unsigned int full_name_hash(const unsigned char * name, size_t len) { +static inline unsigned int full_name_hash(const void *salt, const unsigned char * name, size_t len) { uint32_t hash = 0; + (void)salt; while (len--) { hash = (hash << 4) | (hash >> 28); hash ^= *(name++); |