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authorEric W. Biederman <ebiederm@xmission.com>2014-02-13 18:24:23 (GMT)
committerAl Viro <viro@zeniv.linux.org.uk>2014-10-09 06:38:58 (GMT)
commitbbd5192412fdedbae00888316bfe350bf89d0458 (patch)
treea9fc77990ac4807b581f7f5b5cf6739af826d343 /fs/proc/base.c
parentc143c2333c48f1430231b31a8c17e074b9b504eb (diff)
downloadlinux-bbd5192412fdedbae00888316bfe350bf89d0458.tar.xz
proc: Update proc_flush_task_mnt to use d_invalidate
Now that d_invalidate always succeeds and flushes mount points use it in stead of a combination of shrink_dcache_parent and d_drop in proc_flush_task_mnt. This removes the danger of a mount point under /proc/<pid>/... becoming unreachable after the d_drop. Reviewed-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/proc/base.c')
-rw-r--r--fs/proc/base.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index b4fe0ee..00cd85f 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2639,8 +2639,7 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
/* no ->d_hash() rejects on procfs */
dentry = d_hash_and_lookup(mnt->mnt_root, &name);
if (dentry) {
- shrink_dcache_parent(dentry);
- d_drop(dentry);
+ d_invalidate(dentry);
dput(dentry);
}
@@ -2660,8 +2659,7 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
name.len = snprintf(buf, sizeof(buf), "%d", pid);
dentry = d_hash_and_lookup(dir, &name);
if (dentry) {
- shrink_dcache_parent(dentry);
- d_drop(dentry);
+ d_invalidate(dentry);
dput(dentry);
}