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-rw-r--r--fs/namespace.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 6b5e043..3e95cc2 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -763,9 +763,8 @@ static inline void mntfree(struct mount *mnt)
deactivate_super(sb);
}
-static void mntput_no_expire(struct vfsmount *m)
+static void mntput_no_expire(struct mount *mnt)
{
- struct mount *mnt = real_mount(m);
put_again:
#ifdef CONFIG_SMP
br_read_lock(vfsmount_lock);
@@ -792,7 +791,7 @@ put_again:
mnt_add_count(mnt, mnt->mnt.mnt_pinned + 1);
mnt->mnt.mnt_pinned = 0;
br_write_unlock(vfsmount_lock);
- acct_auto_close_mnt(m);
+ acct_auto_close_mnt(&mnt->mnt);
goto put_again;
}
br_write_unlock(vfsmount_lock);
@@ -805,7 +804,7 @@ void mntput(struct vfsmount *mnt)
/* avoid cacheline pingpong, hope gcc doesn't get "smart" */
if (unlikely(mnt->mnt_expiry_mark))
mnt->mnt_expiry_mark = 0;
- mntput_no_expire(mnt);
+ mntput_no_expire(real_mount(mnt));
}
}
EXPORT_SYMBOL(mntput);
@@ -1351,6 +1350,7 @@ static int do_umount(struct mount *mnt, int flags)
SYSCALL_DEFINE2(umount, char __user *, name, int, flags)
{
struct path path;
+ struct mount *mnt;
int retval;
int lookup_flags = 0;
@@ -1363,6 +1363,7 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags)
retval = user_path_at(AT_FDCWD, name, lookup_flags, &path);
if (retval)
goto out;
+ mnt = real_mount(path.mnt);
retval = -EINVAL;
if (path.dentry != path.mnt->mnt_root)
goto dput_and_out;
@@ -1373,11 +1374,11 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags)
if (!capable(CAP_SYS_ADMIN))
goto dput_and_out;
- retval = do_umount(real_mount(path.mnt), flags);
+ retval = do_umount(mnt, flags);
dput_and_out:
/* we mustn't call path_put() as that would clear mnt_expiry_mark */
dput(path.dentry);
- mntput_no_expire(path.mnt);
+ mntput_no_expire(mnt);
out:
return retval;
}
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