commit 4727dc20e0422211a0e0c72b1ace4ed6096df8a6
author Jens Axboe <axboe@kernel.dk> Wed Feb 17 08:48:00 2021 -0700
committer Jens Axboe <axboe@kernel.dk> Sun Feb 21 17:25:22 2021 -0700
tree 84f3eaae93034140ffce50ac4816171e679d7c3f
parent 958234d5ec9321445500dc5e69dfefb405b3d82c

arch: setup PF_IO_WORKER threads like PF_KTHREAD

PF_IO_WORKER are kernel threads too, but they aren't PF_KTHREAD in the
sense that we don't assign ->set_child_tid with our own structure. Just
ensure that every arch sets up the PF_IO_WORKER threads like kthreads
in the arch implementation of copy_thread().

Signed-off-by: Jens Axboe <axboe@kernel.dk>

arch/arm64/kernel/process.c

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 4cc1ccc..325c83b 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -398,7 +398,7 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start,
 
 	ptrauth_thread_init_kernel(p);
 
-	if (likely(!(p->flags & PF_KTHREAD))) {
+	if (likely(!(p->flags & (PF_KTHREAD | PF_IO_WORKER)))) {
 		*childregs = *current_pt_regs();
 		childregs->regs[0] = 0;