linux-kernel - [PATCH] loongarch: irq: Move to generic_handle_arch

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Date:   Sat, 13 Aug 2022 04:58:39 -0400
From:   guoren@...nel.org
To:     chenhuacai@...nel.org, kernel@...0n.name, zhangqing@...ngson.cn,
        arnd@...db.de, linux-arch@...r.kernel.org, mark.rutland@....com,
        frederic@...nel.org
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        jiaxun.yang@...goat.com, yangtiezhu@...ngson.cn,
        Guo Ren <guoren@...ux.alibaba.com>, Guo Ren <guoren@...nel.org>
Subject: [PATCH] loongarch: irq: Move to generic_handle_arch_irq

From: Guo Ren <guoren@...ux.alibaba.com>

No reason to keep custom handle_loongarch_irq, and move to the generic
one. No reason to keep custom handle_loongarch_irq, and move to the
generic one. The patch also the fixup HAVE_CONTEXT_TRACKING_USER
feature, because handle_loongarch_irq missed ct_irq_enter/exit.

Fixes: 0603839b18f4 ("LoongArch: Add exception/interrupt handling")
Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Signed-off-by: Guo Ren <guoren@...nel.org>
---
 arch/loongarch/kernel/traps.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/arch/loongarch/kernel/traps.c b/arch/loongarch/kernel/traps.c
index aa1c95aaf595..06211640ba1f 100644
--- a/arch/loongarch/kernel/traps.c
+++ b/arch/loongarch/kernel/traps.c
@@ -588,17 +588,6 @@ asmlinkage void cache_parity_error(void)
 	panic("Can't handle the cache error!");
 }
 
-asmlinkage void noinstr handle_loongarch_irq(struct pt_regs *regs)
-{
-	struct pt_regs *old_regs;
-
-	irq_enter_rcu();
-	old_regs = set_irq_regs(regs);
-	handle_arch_irq(regs);
-	set_irq_regs(old_regs);
-	irq_exit_rcu();
-}
-
 asmlinkage void noinstr do_vint(struct pt_regs *regs, unsigned long sp)
 {
 	register int cpu;
@@ -608,7 +597,7 @@ asmlinkage void noinstr do_vint(struct pt_regs *regs, unsigned long sp)
 	cpu = smp_processor_id();
 
 	if (on_irq_stack(cpu, sp))
-		handle_loongarch_irq(regs);
+		generic_handle_arch_irq(regs);
 	else {
 		stack = per_cpu(irq_stack, cpu) + IRQ_STACK_START;
 
@@ -619,7 +608,7 @@ asmlinkage void noinstr do_vint(struct pt_regs *regs, unsigned long sp)
 		"move	$s0, $sp		\n" /* Preserve sp */
 		"move	$sp, %[stk]		\n" /* Switch stack */
 		"move	$a0, %[regs]		\n"
-		"bl	handle_loongarch_irq	\n"
+		"bl	generic_handle_arch_irq	\n"
 		"move	$sp, $s0		\n" /* Restore sp */
 		: /* No outputs */
 		: [stk] "r" (stack), [regs] "r" (regs)
-- 
2.36.1