alpha: take SIGPENDING/NOTIFY_RESUME loop into signal.c
Turn the slow side of work_pending into C function, including all the looping. What we get out of that: * we do _not_ call get_signal_to_deliver() with IRQs disabled anymore * no need to save/restore volatiles on each pass if there turns to be more than one (unlikely, but still) * all double-restart prevention is in C now. * glue gets simpler. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -390,15 +390,9 @@ $work_notifysig:
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bsr $1, do_switch_stack
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mov $sp, $17
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mov $5, $18
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mov $19, $9 /* save old syscall number */
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mov $20, $10 /* save old a3 */
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and $5, _TIF_SIGPENDING, $2
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cmovne $2, 0, $9 /* we don't want double syscall restarts */
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jsr $26, do_notify_resume
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mov $9, $19
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mov $10, $20
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jsr $26, do_work_pending
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bsr $1, undo_switch_stack
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br ret_to_user
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br restore_all
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.end work_pending
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/*
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@ -568,15 +568,24 @@ do_signal(struct pt_regs * regs, struct switch_stack * sw,
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}
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void
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do_notify_resume(struct pt_regs *regs, struct switch_stack *sw,
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unsigned long thread_info_flags,
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do_work_pending(struct pt_regs *regs, struct switch_stack *sw,
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unsigned long thread_flags,
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unsigned long r0, unsigned long r19)
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{
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if (thread_info_flags & _TIF_SIGPENDING)
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do_signal(regs, sw, r0, r19);
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if (thread_info_flags & _TIF_NOTIFY_RESUME) {
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clear_thread_flag(TIF_NOTIFY_RESUME);
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tracehook_notify_resume(regs);
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}
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do {
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if (thread_flags & _TIF_NEED_RESCHED) {
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schedule();
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} else {
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local_irq_enable();
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if (thread_flags & _TIF_SIGPENDING) {
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do_signal(regs, sw, r0, r19);
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r0 = 0;
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} else {
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clear_thread_flag(TIF_NOTIFY_RESUME);
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tracehook_notify_resume(regs);
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}
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}
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local_irq_disable();
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thread_flags = current_thread_info()->flags;
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} while (thread_flags & _TIF_WORK_MASK);
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}
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