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| author | Al Viro <viro@zeniv.linux.org.uk> | 2013-09-29 17:24:49 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-10-25 05:34:59 +0200 |
| commit | 719ea2fbb553ab3f61a174a4b5861289dcc46cb1 (patch) | |
| tree | 00c1e2c71caf2338cfe27f2854cf331515b4f411 /fs/mount.h | |
| parent | don't bother with vfsmount_lock in mounts_poll() (diff) | |
| download | linux-719ea2fbb553ab3f61a174a4b5861289dcc46cb1.tar.xz linux-719ea2fbb553ab3f61a174a4b5861289dcc46cb1.zip | |
new helpers: lock_mount_hash/unlock_mount_hash
aka br_write_{lock,unlock} of vfsmount_lock. Inlines in fs/mount.h,
vfsmount_lock extern moved over there as well.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/mount.h')
| -rw-r--r-- | fs/mount.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/mount.h b/fs/mount.h index 3168dc41bad5..7076f25af35d 100644 --- a/fs/mount.h +++ b/fs/mount.h @@ -1,6 +1,7 @@ #include <linux/mount.h> #include <linux/seq_file.h> #include <linux/poll.h> +#include <linux/lglock.h> struct mnt_namespace { atomic_t count; @@ -83,6 +84,18 @@ static inline void get_mnt_ns(struct mnt_namespace *ns) atomic_inc(&ns->count); } +extern struct lglock vfsmount_lock; + +static inline void lock_mount_hash(void) +{ + br_write_lock(&vfsmount_lock); +} + +static inline void unlock_mount_hash(void) +{ + br_write_unlock(&vfsmount_lock); +} + struct proc_mounts { struct seq_file m; struct mnt_namespace *ns; |