1020 	if (sb->s_writers.frozen != SB_UNFROZEN)  in reconfigure_super()
1044 			if (sb->s_writers.frozen != SB_UNFROZEN)  in reconfigure_super()
1162  * emergency_thaw_all -- forcibly thaw every frozen filesystem
1449  * A filesystem that owns multiple block devices may be frozen from each
1486  * A filesystem that owns multiple block devices may be frozen from each
1494  *         as it may have been frozen multiple times (kernel may hold a
1495  *         freeze or might be frozen from other block devices).
1552 	 * It is enough to check bdev was not frozen before we set  in setup_bdev_super()
1557 			warnf(fc, "%pg: Can't mount, blockdev is frozen", bdev);  in setup_bdev_super()
1912 		unsigned short old = sb->s_writers.frozen;  in wait_for_partially_frozen()
1915 		ret = wait_var_event_killable(&sb->s_writers.frozen,  in wait_for_partially_frozen()
1916 					       sb->s_writers.frozen != old);  in wait_for_partially_frozen()
1919 		 sb->s_writers.frozen != SB_UNFROZEN &&  in wait_for_partially_frozen()
1920 		 sb->s_writers.frozen != SB_FREEZE_COMPLETE);  in wait_for_partially_frozen()
1983  * userspace can both hold a filesystem frozen.  The filesystem remains frozen
1987  * frozen through the block layer via multiple block devices. In this
1989  * FREEZE_MAY_NEST. The filesystem remains frozen until all block
1993  * During this function, sb->s_writers.frozen goes through these values:
1997  * SB_FREEZE_WRITE: The file system is in the process of being frozen.  New
2008  * SB_FREEZE_FS: The file system is frozen. Now all internal sources of fs
2014  * mostly auxiliary for filesystems to verify they do not modify frozen fs.
2016  * sb->s_writers.frozen is protected by sb->s_umount.
2032 	if (sb->s_writers.frozen == SB_FREEZE_COMPLETE) {  in freeze_super()
2042 	if (sb->s_writers.frozen != SB_UNFROZEN) {  in freeze_super()
2055 		sb->s_writers.frozen = SB_FREEZE_COMPLETE;  in freeze_super()
2056 		wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2061 	sb->s_writers.frozen = SB_FREEZE_WRITE;  in freeze_super()
2068 	sb->s_writers.frozen = SB_FREEZE_PAGEFAULT;  in freeze_super()
2074 		sb->s_writers.frozen = SB_UNFROZEN;  in freeze_super()
2076 		wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2082 	sb->s_writers.frozen = SB_FREEZE_FS;  in freeze_super()
2090 			sb->s_writers.frozen = SB_UNFROZEN;  in freeze_super()
2092 			wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2099 	 * when frozen is set to SB_FREEZE_COMPLETE, and for thaw_super().  in freeze_super()
2102 	sb->s_writers.frozen = SB_FREEZE_COMPLETE;  in freeze_super()
2103 	wake_up_var(&sb->s_writers.frozen);  in freeze_super()
2112  * frozen both by userspace and the kernel, a thaw call from either source
2120 	if (sb->s_writers.frozen != SB_FREEZE_COMPLETE)  in thaw_super_locked()
2131 		sb->s_writers.frozen = SB_UNFROZEN;  in thaw_super_locked()
2132 		wake_up_var(&sb->s_writers.frozen);  in thaw_super_locked()
2148 	sb->s_writers.frozen = SB_UNFROZEN;  in thaw_super_locked()
2149 	wake_up_var(&sb->s_writers.frozen);  in thaw_super_locked()
2174  * have been frozen through the block layer via multiple block devices.
2175  * The filesystem remains frozen until all block devices are unfrozen.