filesystem freeze: allow SysRq emergency thaw to thaw frozen filesystems

[mirror_ubuntu-artful-kernel.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 42436ae42f7022468fd3fc8f4a947b69f704a7ed..61211ad823fe6b4e251e048866751cffd4409741 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -849,7 +849,7 @@ struct file {
 #define f_dentry       f_path.dentry
 #define f_vfsmnt       f_path.mnt
        const struct file_operations    *f_op;
-       spinlock_t              f_lock;  /* f_ep_links, f_flags */
+       spinlock_t              f_lock;  /* f_ep_links, f_flags, no IRQ */
        atomic_long_t           f_count;
        unsigned int            f_flags;
        fmode_t                 f_mode;
@@ -1878,6 +1878,7 @@ extern struct block_device *open_by_devnum(dev_t, fmode_t);
 extern void invalidate_bdev(struct block_device *);
 extern int sync_blockdev(struct block_device *bdev);
 extern struct super_block *freeze_bdev(struct block_device *);
+extern void emergency_thaw_all(void);
 extern int thaw_bdev(struct block_device *bdev, struct super_block *sb);
 extern int fsync_bdev(struct block_device *);
 extern int fsync_super(struct super_block *);