Commit 4727dc20 authored by Jens Axboe's avatar Jens Axboe
Browse files

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: default avatarJens Axboe <axboe@kernel.dk>
parent 958234d5

arch/alpha/kernel/process.c

+1 −1
Original line number Diff line number Diff line
@@ -249,7 +249,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, 
	childti->pcb.ksp = (unsigned long) childstack;

	childti->pcb.flags = 1;	/* set FEN, clear everything else */



	if (unlikely(p->flags & PF_KTHREAD)) {

	if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {

		/* kernel thread */

		memset(childstack, 0,

			sizeof(struct switch_stack) + sizeof(struct pt_regs));

arch/arc/kernel/process.c

+1 −1
Original line number Diff line number Diff line
@@ -191,7 +191,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, 
	childksp[0] = 0;			/* fp */

	childksp[1] = (unsigned long)ret_from_fork; /* blink */



	if (unlikely(p->flags & PF_KTHREAD)) {

	if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {

		memset(c_regs, 0, sizeof(struct pt_regs));



		c_callee->r13 = kthread_arg;

arch/arm/kernel/process.c

+1 −1
Original line number Diff line number Diff line
@@ -243,7 +243,7 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, 
	thread->cpu_domain = get_domain();

#endif



	if (likely(!(p->flags & PF_KTHREAD))) {

	if (likely(!(p->flags & (PF_KTHREAD | PF_IO_WORKER)))) {

		*childregs = *current_pt_regs();

		childregs->ARM_r0 = 0;

		if (stack_start)

arch/arm64/kernel/process.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

arch/csky/kernel/process.c

+1 −1
Original line number Diff line number Diff line
@@ -49,7 +49,7 @@ int copy_thread(unsigned long clone_flags, 
	/* setup thread.sp for switch_to !!! */

	p->thread.sp = (unsigned long)childstack;



	if (unlikely(p->flags & PF_KTHREAD)) {

	if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {

		memset(childregs, 0, sizeof(struct pt_regs));

		childstack->r15 = (unsigned long) ret_from_kernel_thread;

		childstack->r10 = kthread_arg;