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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-03-05 23:46:18 +0300 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-03-05 23:46:18 +0300 |
| commit | 3fa04ecd72780da31ba8b329e148179bc24a9c7d (patch) | |
| tree | f5d462fd4aee086952d18f159f737c450ab46b3b /include/linux/mount.h | |
| parent | 180b62a3d837613fcac3ce89576526423926c3c3 (diff) | |
| parent | 1cda707d52e51a6cafac0aef12d2bd7052d572e6 (diff) | |
| download | linux-3fa04ecd72780da31ba8b329e148179bc24a9c7d.tar.xz | |
Merge branch 'writeback-for-2.6.34' into nfs-for-2.6.34
Diffstat (limited to 'include/linux/mount.h')
| -rw-r--r-- | include/linux/mount.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/include/linux/mount.h b/include/linux/mount.h index 5d5275364867..4bd05474d11d 100644 --- a/include/linux/mount.h +++ b/include/linux/mount.h @@ -34,7 +34,18 @@ struct mnt_namespace; #define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */ #define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */ -#define MNT_PNODE_MASK 0x3000 /* propagation flag mask */ +/* + * MNT_SHARED_MASK is the set of flags that should be cleared when a + * mount becomes shared. Currently, this is only the flag that says a + * mount cannot be bind mounted, since this is how we create a mount + * that shares events with another mount. If you add a new MNT_* + * flag, consider how it interacts with shared mounts. + */ +#define MNT_SHARED_MASK (MNT_UNBINDABLE) +#define MNT_PROPAGATION_MASK (MNT_SHARED | MNT_UNBINDABLE) + + +#define MNT_INTERNAL 0x4000 struct vfsmount { struct list_head mnt_hash; @@ -66,7 +77,7 @@ struct vfsmount { int mnt_pinned; int mnt_ghosts; #ifdef CONFIG_SMP - int *mnt_writers; + int __percpu *mnt_writers; #else int mnt_writers; #endif @@ -123,7 +134,6 @@ extern int do_add_mount(struct vfsmount *newmnt, struct path *path, extern void mark_mounts_for_expiry(struct list_head *mounts); -extern spinlock_t vfsmount_lock; extern dev_t name_to_dev_t(char *name); #endif /* _LINUX_MOUNT_H */ |