[PATCH v5 02/42] mount: make {lock,unlock}_mount_hash() static

Christian Brauner
2021-01-12T22:04:23Z

The lock_mount_hash() and unlock_mount_hash() helpers are never called
outside a single file. Remove them from the header and make them static
to reflect this fact. There's no need to have them callable from other
places right now, as Christoph observed.

Suggested-by: Christoph Hellwig <hch@lst.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
/* v2 */
- Christoph Hellwig <hch@lst.de>:
- Add a patch to make {lock,unlock)_mount_hash() static.

/* v3 */
unchanged

/* v4 */
unchanged

/* v5 */
base-commit: 7c53f6b671f4aba70ff15e1b05148b10d58c2837
---
fs/mount.h | 10 ----------
fs/namespace.c | 10 ++++++++++
2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/mount.h b/fs/mount.h
index ce6c376e0bc2..0b6e08cf8afb 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -124,16 +124,6 @@ static inline void get_mnt_ns(struct mnt_namespace *ns)

extern seqlock_t mount_lock;

-static inline void lock_mount_hash(void)
-{
- write_seqlock(&mount_lock);
-}
-
-static inline void unlock_mount_hash(void)
-{
- write_sequnlock(&mount_lock);
-}
-
struct proc_mounts {
struct mnt_namespace *ns;
struct path root;
diff --git a/fs/namespace.c b/fs/namespace.c
index dc782ddf603e..8cb2c132525a 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -87,6 +87,16 @@ EXPORT_SYMBOL_GPL(fs_kobj);
*/
__cacheline_aligned_in_smp DEFINE_SEQLOCK(mount_lock);

+static inline void lock_mount_hash(void)
+{
+ write_seqlock(&mount_lock);
+}
+
+static inline void unlock_mount_hash(void)
+{
+ write_sequnlock(&mount_lock);
+}
+
static inline struct hlist_head *m_hash(struct vfsmount *mnt, struct dentry *dentry)
{
unsigned long tmp = ((unsigned long)mnt / L1_CACHE_BYTES);
--
2.30.0