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kill dentry_unhash() 

the last user is gone

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-03-01 15:35:06 -05:00
parent f8b31710e4
commit 9d95afd597
2 changed files with 0 additions and 30 deletions
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25
fs/namei.c
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@ -3685,31 +3685,6 @@ SYSCALL_DEFINE2(mkdir, const char __user *, pathname, umode_t, mode)
return sys_mkdirat(AT_FDCWD, pathname, mode);
}
/*
* The dentry_unhash() helper will try to drop the dentry early: we
* should have a usage count of 1 if we're the only user of this
* dentry, and if that is true (possibly after pruning the dcache),
* then we drop the dentry now.
*
* A low-level filesystem can, if it choses, legally
* do a
*
* if (!d_unhashed(dentry))
* return -EBUSY;
*
* if it cannot handle the case of removing a directory
* that is still in use by something else..
*/
void dentry_unhash(struct dentry *dentry)
{
shrink_dcache_parent(dentry);
spin_lock(&dentry->d_lock);
if (dentry->d_lockref.count == 1)
__d_drop(dentry);
spin_unlock(&dentry->d_lock);
}
EXPORT_SYMBOL(dentry_unhash);
int vfs_rmdir(struct inode *dir, struct dentry *dentry)
{
int error = may_delete(dir, dentry, 1);

5
include/linux/fs.h
View File

@ -1539,11 +1539,6 @@ extern int vfs_unlink(struct inode *, struct dentry *, struct inode **);
extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **, unsigned int);
extern int vfs_whiteout(struct inode *, struct dentry *);
/*
* VFS dentry helper functions.
*/
extern void dentry_unhash(struct dentry *dentry);
/*
* VFS file helper functions.
*/