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authorAl Viro <viro@zeniv.linux.org.uk>2011-07-07 15:03:58 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-07-20 01:44:17 -0400
commita4464dbc0ca6a3ab8e9d1206bc05059dae2a559d (patch)
treed3c9332ab72cf5a4eba483ba1ff83c54ca4c42a0 /fs/libfs.c
parente3c3d9c838d48c0341c40ea45ee087e3d8c8ea39 (diff)
downloadlinux-a4464dbc0ca6a3ab8e9d1206bc05059dae2a559d.tar.bz2
Make ->d_sb assign-once and always non-NULL
New helper (non-exported, fs/internal.h-only): __d_alloc(sb, name). Allocates dentry, sets its ->d_sb to given superblock and sets ->d_op accordingly. Old d_alloc(NULL, name) callers are converted to that (all of them know what superblock they want). d_alloc() itself is left only for parent != NULl case; uses __d_alloc(), inserts result into the list of parent's children. Note that now ->d_sb is assign-once and never NULL *and* ->d_parent is never NULL either. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/libfs.c')
-rw-r--r--fs/libfs.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index 275ca4749a2e..bd50b11f92da 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -16,6 +16,8 @@
#include <asm/uaccess.h>
+#include "internal.h"
+
static inline int simple_positive(struct dentry *dentry)
{
return dentry->d_inode && !d_unhashed(dentry);
@@ -246,13 +248,11 @@ struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
root->i_ino = 1;
root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
root->i_atime = root->i_mtime = root->i_ctime = CURRENT_TIME;
- dentry = d_alloc(NULL, &d_name);
+ dentry = __d_alloc(s, &d_name);
if (!dentry) {
iput(root);
goto Enomem;
}
- dentry->d_sb = s;
- dentry->d_parent = dentry;
d_instantiate(dentry, root);
s->s_root = dentry;
s->s_d_op = dops;