From: Tetsuo Handa penguin-kernel@i-love.sakura.ne.jp
[ 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@intel.com Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- 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; }