add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

 kernel/arch/x86/entry/entry_64.S
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..
@@ -733,7 +733,23 @@
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 	btl	$9, EFLAGS(%rsp)		/* were interrupts off? */
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 	jnc	1f
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 0:	cmpl	$0, PER_CPU_VAR(__preempt_count)
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+#ifndef CONFIG_PREEMPT_LAZY
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 	jnz	1f
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+#else
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+	jz	do_preempt_schedule_irq
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+
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+	# atleast preempt count == 0 ?
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+	cmpl $_PREEMPT_ENABLED,PER_CPU_VAR(__preempt_count)
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+	jnz	1f
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+
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+	movq	PER_CPU_VAR(current_task), %rcx
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+	cmpl	$0, TASK_TI_preempt_lazy_count(%rcx)
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+	jnz	1f
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+
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+	btl	$TIF_NEED_RESCHED_LAZY,TASK_TI_flags(%rcx)
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+	jnc	1f
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+do_preempt_schedule_irq:
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+#endif
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 	call	preempt_schedule_irq
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 	jmp	0b
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755
 1:
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@@ -1084,6 +1100,7 @@
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 	jmp	2b
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 	.previous
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+#ifndef CONFIG_PREEMPT_RT_FULL
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 /* Call softirq on interrupt stack. Interrupts are off. */
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 ENTRY(do_softirq_own_stack)
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 	pushq	%rbp
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@@ -1094,6 +1111,7 @@
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 	leaveq
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 	ret
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 ENDPROC(do_softirq_own_stack)
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+#endif
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 #ifdef CONFIG_XEN
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 idtentry hypervisor_callback xen_do_hypervisor_callback has_error_code=0