linux-kernel - [PATCH 2/8] kernel: unmask SIGSTOP for IO threads

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Date:   Thu, 25 Mar 2021 18:39:25 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     io-uring@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, ebiederm@...ssion.com,
        metze@...ba.org, oleg@...hat.com, linux-kernel@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 2/8] kernel: unmask SIGSTOP for IO threads

With IO threads accepting signals, including SIGSTOP, unmask the
SIGSTOP signal from the default blocked mask.

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 kernel/fork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index d3171e8e88e5..d5a40552910f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2435,7 +2435,7 @@ struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node)
 	tsk = copy_process(NULL, 0, node, &args);
 	if (!IS_ERR(tsk)) {
 		sigfillset(&tsk->blocked);
-		sigdelsetmask(&tsk->blocked, sigmask(SIGKILL));
+		sigdelsetmask(&tsk->blocked, sigmask(SIGKILL)|sigmask(SIGSTOP));
 	}
 	return tsk;
 }
-- 
2.31.0