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vfs: d_invalidate() should leave mountpoints alone

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Al Viro 2011-11-07 16:39:57 +00:00 • committed by Linus Torvalds
parent a84450604d
commit 50e696308c
1 changed files with 4 additions and 2 deletions
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6
fs/dcache.c
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@ -546,9 +546,11 @@ int d_invalidate(struct dentry * dentry)
* would make it unreachable from the root, * would make it unreachable from the root,
* we might still populate it if it was a * we might still populate it if it was a
* working directory or similar). * working directory or similar).
* We also need to leave mountpoints alone,
* directory or not.
*/ */
if (dentry->d_count > 1) { if (dentry->d_count > 1 && dentry->d_inode) {
if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) { if (S_ISDIR(dentry->d_inode->i_mode) || d_mountpoint(dentry)) {
spin_unlock(&dentry->d_lock); spin_unlock(&dentry->d_lock);
return -EBUSY; return -EBUSY;
} }