From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> [ Upstream commit e3f9387aea67742b9d1f4de8e5bb2fd08a8a4584 ] kernel test robot reported that RCU stall via printk() flooding is possible [1] when stress testing. Link: https://lkml.kernel.org/r/20211129073709.GA18483@xsang-OptiPlex-9020 [1] Reported-by: kernel test robot <oliver.sang@xxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/block/loop.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/loop.c b/drivers/block/loop.c index dfc72a1f6500d..c00ae30fde89e 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -2429,7 +2429,7 @@ static int loop_control_remove(int idx) int ret; if (idx < 0) { - pr_warn("deleting an unspecified loop device is not supported.\n"); + pr_warn_once("deleting an unspecified loop device is not supported.\n"); return -EINVAL; } -- 2.33.0
