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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-10 22:14:12 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-11 04:54:35 +0200 |
| commit | 26fe575028703948880fce4355a210c76bb0536e (patch) | |
| tree | 0a7d04289e1eb1f1739659ebc9498d40f2add5da /fs/ext4/namei.c | |
| parent | vfs: move dentry name length comparison from dentry_cmp() into callers (diff) | |
| download | linux-26fe575028703948880fce4355a210c76bb0536e.tar.xz linux-26fe575028703948880fce4355a210c76bb0536e.zip | |
vfs: make it possible to access the dentry hash/len as one 64-bit entry
This allows comparing hash and len in one operation on 64-bit
architectures. Right now only __d_lookup_rcu() takes advantage of this,
since that is the case we care most about.
The use of anonymous struct/unions hides the alternate 64-bit approach
from most users, the exception being a few cases where we initialize a
'struct qstr' with a static initializer. This makes the problematic
cases use a new QSTR_INIT() helper function for that (but initializing
just the name pointer with a "{ .name = xyzzy }" initializer remains
valid, as does just copying another qstr structure).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ext4/namei.c')
| -rw-r--r-- | fs/ext4/namei.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 349d7b3671c8..e2a3f4b0ff78 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1052,10 +1052,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru struct dentry *ext4_get_parent(struct dentry *child) { __u32 ino; - static const struct qstr dotdot = { - .name = "..", - .len = 2, - }; + static const struct qstr dotdot = QSTR_INIT("..", 2); struct ext4_dir_entry_2 * de; struct buffer_head *bh; |