add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/mips/kernel/entry.S
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@@ -19,7 +19,7 @@
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 #include <asm/thread_info.h>
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 #include <asm/war.h>
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-#ifndef CONFIG_PREEMPT
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+#ifndef CONFIG_PREEMPTION
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 #define resume_kernel	restore_all
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 #else
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 #define __ret_from_irq	ret_from_exception
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@@ -27,7 +27,7 @@
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 	.text
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 	.align	5
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-#ifndef CONFIG_PREEMPT
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+#ifndef CONFIG_PREEMPTION
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 FEXPORT(ret_from_exception)
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 	local_irq_disable			# preempt stop
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 	b	__ret_from_irq
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@@ -53,20 +53,19 @@
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 	bnez	t0, work_pending
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 	j	restore_all
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-#ifdef CONFIG_PREEMPT
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+#ifdef CONFIG_PREEMPTION
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 resume_kernel:
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 	local_irq_disable
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 	lw	t0, TI_PRE_COUNT($28)
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 	bnez	t0, restore_all
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-need_resched:
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 	LONG_L	t0, TI_FLAGS($28)
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 	andi	t1, t0, _TIF_NEED_RESCHED
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 	beqz	t1, restore_all
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 	LONG_L	t0, PT_STATUS(sp)		# Interrupts off?
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 	andi	t0, 1
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 	beqz	t0, restore_all
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-	jal	preempt_schedule_irq
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-	b	need_resched
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+	PTR_LA	ra, restore_all
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+	j	preempt_schedule_irq
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 #endif
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 FEXPORT(ret_from_kernel_thread)
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@@ -170,8 +169,8 @@
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 	jal	syscall_trace_leave
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 	b	resume_userspace
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-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || \
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-    defined(CONFIG_MIPS_MT)
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+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR5) || \
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+    defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_MIPS_MT)
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 /*
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  * MIPS32R2 Instruction Hazard Barrier - must be called
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@@ -184,4 +183,4 @@
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 	nop
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 	END(mips_ihb)
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-#endif /* CONFIG_CPU_MIPSR2 or CONFIG_CPU_MIPSR6 or CONFIG_MIPS_MT */
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+#endif /* CONFIG_CPU_MIPSR2 - CONFIG_CPU_MIPSR6 or CONFIG_MIPS_MT */