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alpha: add support for TIF_NOTIFY_SIGNAL 

Wire up TIF_NOTIFY_SIGNAL handling for alpha.

Cc: linux-alpha@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-10-08 09:11:42 -06:00
parent bec58f40d6
commit 5a9a8897c2
3 changed files with 4 additions and 2 deletions
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2
arch/alpha/include/asm/thread_info.h
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@ -62,6 +62,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define TIF_SIGPENDING 2 /* signal pending */ #define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_SYSCALL_AUDIT 4 /* syscall audit active */ #define TIF_SYSCALL_AUDIT 4 /* syscall audit active */
#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
#define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */ #define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */
#define TIF_MEMDIE 13 /* is terminating due to OOM killer */ #define TIF_MEMDIE 13 /* is terminating due to OOM killer */
#define TIF_POLLING_NRFLAG 14 /* idle is polling for TIF_NEED_RESCHED */ #define TIF_POLLING_NRFLAG 14 /* idle is polling for TIF_NEED_RESCHED */
@ -71,6 +72,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
/* Work to do on interrupt/exception return. */ /* Work to do on interrupt/exception return. */

2
arch/alpha/kernel/entry.S
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@ -544,7 +544,7 @@ $ret_success:
.align 4 .align 4
.type work_pending, @function .type work_pending, @function
work_pending: work_pending:
and $17, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING, $2 and $17, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL, $2
bne $2, $work_notifysig bne $2, $work_notifysig
$work_resched: $work_resched:

2
arch/alpha/kernel/signal.c
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@ -527,7 +527,7 @@ do_work_pending(struct pt_regs *regs, unsigned long thread_flags,
schedule(); schedule();
} else { } else {
local_irq_enable(); local_irq_enable();
if (thread_flags & _TIF_SIGPENDING) { if (thread_flags & (_TIF_SIGPENDING|_TIF_NOTIFY_SIGNAL)) {
do_signal(regs, r0, r19); do_signal(regs, r0, r19);
r0 = 0; r0 = 0;
} else { } else {