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Each struct zram uses the same key for its struct lockdep_map which is used for locking analysis. According to Sergey the lock chains might be different if zram1 is used for and zram2 is for ext4. This might lead to false dead lock reports if it mixes a zram1 chain with a zram2. This can be avoided if each lockmap gets its own unique key.c Use a dynamic lock_class_key for the table_lock_map. Link: https://lore.kernel.org/20260714141300.3945672-3-bigeasy@linutronix.de Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Tested-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>