1032 	if (sb->s_writers.frozen != SB_UNFROZEN)  in reconfigure_super()
1056 			if (sb->s_writers.frozen != SB_UNFROZEN)  in reconfigure_super()
1174  * emergency_thaw_all -- forcibly thaw every frozen filesystem
1461  * A filesystem that owns multiple block devices may be frozen from each
1498  * A filesystem that owns multiple block devices may be frozen from each
1506  *         as it may have been frozen multiple times (kernel may hold a
1507  *         freeze or might be frozen from other block devices).
1517 	 * The block device may have been frozen before it was claimed by a  in fs_bdev_thaw()
1519 	 * frozen block device and has temporarily claimed the block device for  in fs_bdev_thaw()
1573 	 * It is enough to check bdev was not frozen before we set  in setup_bdev_super()
1578 			warnf(fc, "%pg: Can't mount, blockdev is frozen", bdev);  in setup_bdev_super()
1892 		unsigned short old = sb->s_writers.frozen;  in wait_for_partially_frozen()
1895 		ret = wait_var_event_killable(&sb->s_writers.frozen,  in wait_for_partially_frozen()
1896 					       sb->s_writers.frozen != old);  in wait_for_partially_frozen()
1899 		 sb->s_writers.frozen != SB_UNFROZEN &&  in wait_for_partially_frozen()
1900 		 sb->s_writers.frozen != SB_FREEZE_COMPLETE);  in wait_for_partially_frozen()
1963  * userspace can both hold a filesystem frozen.  The filesystem remains frozen
1967  * frozen through the block layer via multiple block devices. In this
1969  * FREEZE_MAY_NEST. The filesystem remains frozen until all block
1973  * During this function, sb->s_writers.frozen goes through these values:
1977  * SB_FREEZE_WRITE: The file system is in the process of being frozen.  New
1988  * SB_FREEZE_FS: The file system is frozen. Now all internal sources of fs
1994  * mostly auxiliary for filesystems to verify they do not modify frozen fs.
1996  * sb->s_writers.frozen is protected by sb->s_umount.
2012 	if (sb->s_writers.frozen == SB_FREEZE_COMPLETE) {  in freeze_super()
2022 	if (sb->s_writers.frozen != SB_UNFROZEN) {  in freeze_super()
2035 		sb->s_writers.frozen = SB_FREEZE_COMPLETE;  in freeze_super()
2036 		wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2041 	sb->s_writers.frozen = SB_FREEZE_WRITE;  in freeze_super()
2048 	sb->s_writers.frozen = SB_FREEZE_PAGEFAULT;  in freeze_super()
2054 		sb->s_writers.frozen = SB_UNFROZEN;  in freeze_super()
2056 		wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2062 	sb->s_writers.frozen = SB_FREEZE_FS;  in freeze_super()
2070 			sb->s_writers.frozen = SB_UNFROZEN;  in freeze_super()
2072 			wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2079 	 * when frozen is set to SB_FREEZE_COMPLETE, and for thaw_super().  in freeze_super()
2082 	sb->s_writers.frozen = SB_FREEZE_COMPLETE;  in freeze_super()
2083 	wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2092  * frozen both by userspace and the kernel, a thaw call from either source
2100 	if (sb->s_writers.frozen != SB_FREEZE_COMPLETE)  in thaw_super_locked()
2111 		sb->s_writers.frozen = SB_UNFROZEN;  in thaw_super_locked()
2112 		wake_up_var(&sb->s_writers.frozen);  in thaw_super_locked()
2128 	sb->s_writers.frozen = SB_UNFROZEN;  in thaw_super_locked()
2129 	wake_up_var(&sb->s_writers.frozen);  in thaw_super_locked()
2154  * have been frozen through the block layer via multiple block devices.
2155  * The filesystem remains frozen until all block devices are unfrozen.