mount_writer: write_seqlock; that's an equivalent of {un,}lock_mount_hash()
mount_locked_reader: read_seqlock_excl; these tend to be open-coded.
No bulk conversions, please - if nothing else, quite a few places take
use mount_writer form when mount_locked_reader is sufficent. It needs
to be dealt with carefully.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
fs/mount.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/mount.h b/fs/mount.h
index 97737051a8b9..ed8c83ba836a 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -154,6 +154,11 @@ static inline void get_mnt_ns(struct mnt_namespace *ns)
extern seqlock_t mount_lock;
+DEFINE_LOCK_GUARD_0(mount_writer, write_seqlock(&mount_lock),
+ write_sequnlock(&mount_lock))
+DEFINE_LOCK_GUARD_0(mount_locked_reader, read_seqlock_excl(&mount_lock),
+ read_sequnlock_excl(&mount_lock))
+
struct proc_mounts {
struct mnt_namespace *ns;
struct path root;
--
2.47.2
