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>

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 6c71554..5112ab9 100644 (file)
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -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));

diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index 37f724a..d838d0d 100644 (file)
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -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;

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index ee3aee6..5199a2b 100644 (file)
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -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)

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 4cc1ccc..325c83b 100644 (file)
--- 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;
 

diff --git a/arch/csky/kernel/process.c b/arch/csky/kernel/process.c
index 69af6bc..3d0ca22 100644 (file)
--- a/arch/csky/kernel/process.c
+++ b/arch/csky/kernel/process.c
@@ -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;

diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c
index bc1364d..46b1342 100644 (file)
--- a/arch/h8300/kernel/process.c
+++ b/arch/h8300/kernel/process.c
@@ -112,7 +112,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 
        childregs = (struct pt_regs *) (THREAD_SIZE + task_stack_page(p)) - 1;
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(childregs, 0, sizeof(struct pt_regs));
                childregs->retpc = (unsigned long) ret_from_kernel_thread;
                childregs->er4 = topstk; /* arg */

diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index 6a980cb..c61165c 100644 (file)
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c
@@ -73,7 +73,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
                                                    sizeof(*ss));
        ss->lr = (unsigned long)ret_from_fork;
        p->thread.switch_sp = ss;
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(childregs, 0, sizeof(struct pt_regs));
                /* r24 <- fn, r25 <- arg */
                ss->r24 = usp;

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 4ebbfa0..7e1a152 100644 (file)
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -338,7 +338,7 @@ copy_thread(unsigned long clone_flags, unsigned long user_stack_base,
 
        ia64_drop_fpu(p);       /* don't pick up stale state from a CPU's fph */
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                if (unlikely(!user_stack_base)) {
                        /* fork_idle() called us */
                        return 0;

diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index 08359a6..da83cc8 100644 (file)
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -157,7 +157,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
         */
        p->thread.fs = get_fs().seg;
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                /* kernel thread */
                memset(frame, 0, sizeof(struct fork_frame));
                frame->regs.sr = PS_S;

diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 657c2be..62aa237 100644 (file)
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -59,7 +59,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
        struct pt_regs *childregs = task_pt_regs(p);
        struct thread_info *ti = task_thread_info(p);
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                /* if we're creating a new kernel thread then just zeroing all
                 * the registers. That's OK for a brand new thread.*/
                memset(childregs, 0, sizeof(struct pt_regs));

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index af4c862..7efa0d1 100644 (file)
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -120,7 +120,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
        /*  Put the stack after the struct pt_regs.  */
        childksp = (unsigned long) childregs;
        p->thread.cp0_status = (read_c0_status() & ~(ST0_CU2|ST0_CU1)) | ST0_KERNEL_CUMASK;
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                /* kernel thread */
                unsigned long status = p->thread.cp0_status;
                memset(childregs, 0, sizeof(struct pt_regs));

diff --git a/arch/nds32/kernel/process.c b/arch/nds32/kernel/process.c
index e01ad5d..c1327e5 100644 (file)
--- a/arch/nds32/kernel/process.c
+++ b/arch/nds32/kernel/process.c
@@ -156,7 +156,7 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start,
 
        memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context));
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(childregs, 0, sizeof(struct pt_regs));
                /* kernel thread fn */
                p->thread.cpu_context.r6 = stack_start;

diff --git a/arch/nios2/kernel/process.c b/arch/nios2/kernel/process.c
index 50b4eb1..c5f916c 100644 (file)
--- a/arch/nios2/kernel/process.c
+++ b/arch/nios2/kernel/process.c
@@ -109,7 +109,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
        struct switch_stack *childstack =
                ((struct switch_stack *)childregs) - 1;
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(childstack, 0,
                        sizeof(struct switch_stack) + sizeof(struct pt_regs));
 

diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index 3c98728..83fba4e 100644 (file)
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -167,7 +167,7 @@ copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
        sp -= sizeof(struct pt_regs);
        kregs = (struct pt_regs *)sp;
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(kregs, 0, sizeof(struct pt_regs));
                kregs->gpr[20] = usp; /* fn, kernel thread */
                kregs->gpr[22] = arg;

diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index dd5f985..06d326c 100644 (file)
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -112,7 +112,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
        struct pt_regs *childregs = task_pt_regs(p);
 
        /* p->thread holds context to be restored by __switch_to() */
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                /* Kernel thread */
                memset(childregs, 0, sizeof(struct pt_regs));
                childregs->gp = gp_in_global;

diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 367bd00..e20bed1 100644 (file)
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -130,7 +130,7 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
        frame->sf.gprs[9] = (unsigned long)frame;
 
        /* Store access registers to kernel stack of new process. */
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                /* kernel thread */
                memset(&frame->childregs, 0, sizeof(struct pt_regs));
                frame->childregs.psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT |

diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 80a5d1c..1aa508e 100644 (file)
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -114,7 +114,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
 
        childregs = task_pt_regs(p);
        p->thread.sp = (unsigned long) childregs;
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(childregs, 0, sizeof(struct pt_regs));
                p->thread.pc = (unsigned long) ret_from_kernel_thread;
                childregs->regs[4] = arg;

diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index a023637..0f9c606 100644 (file)
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -309,7 +309,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg,
        ti->ksp = (unsigned long) new_stack;
        p->thread.kregs = childregs;
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                extern int nwindows;
                unsigned long psr;
                memset(new_stack, 0, STACKFRAME_SZ + TRACEREG_SZ);

diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index 6f8c782..7afd0a8 100644 (file)
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -597,7 +597,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg,
                                       sizeof(struct sparc_stackf));
        t->fpsaved[0] = 0;
 
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(child_trap_frame, 0, child_stack_sz);
                __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP] = 
                        (current_pt_regs()->tstate + 1) & TSTATE_CWP;

diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 81d508d..c501106 100644 (file)
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -157,7 +157,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
                unsigned long arg, struct task_struct * p, unsigned long tls)
 {
        void (*handler)(void);
-       int kthread = current->flags & PF_KTHREAD;
+       int kthread = current->flags & (PF_KTHREAD | PF_IO_WORKER);
        int ret = 0;
 
        p->thread = (struct thread_struct) INIT_THREAD;

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 145a7ac..9c214d7 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -161,7 +161,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg,
 #endif
 
        /* Kernel thread ? */
-       if (unlikely(p->flags & PF_KTHREAD)) {
+       if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                memset(childregs, 0, sizeof(struct pt_regs));
                kthread_frame_init(frame, sp, arg);
                return 0;

diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 397a7de..9534ef5 100644 (file)
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -217,7 +217,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
 
        p->thread.sp = (unsigned long)childregs;
 
-       if (!(p->flags & PF_KTHREAD)) {
+       if (!(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
                struct pt_regs *regs = current_pt_regs();
                unsigned long usp = usp_thread_fn ?
                        usp_thread_fn : regs->areg[1];