linux-kernel - [patch 04/10] x86/traps: Remove pointless irq enable from do_spurious_interrupt

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Date:   Tue, 25 Feb 2020 22:36:40 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Steven Rostedt <rostedt@...dmis.org>,
        Brian Gerst <brgerst@...il.com>,
        Juergen Gross <jgross@...e.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>
Subject: [patch 04/10] x86/traps: Remove pointless irq enable from do_spurious_interrupt_bug()

From: Thomas Gleixner <tglx@...utronix.de>

That function returns immediately after conditionally reenabling interrupts which
is more than pointless and requires the ASM code to disable interrupts again.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Sean Christopherson <sean.j.christopherson@...el.com>
Reviewed-by: Alexandre Chartre <alexandre.chartre@...cle.com>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20191023123117.871608831@linutronix.de

---
 arch/x86/kernel/traps.c |    1 -
 1 file changed, 1 deletion(-)

--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -862,7 +862,6 @@ do_simd_coprocessor_error(struct pt_regs
 dotraplinkage void
 do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
 {
-	cond_local_irq_enable(regs);
 }
 
 dotraplinkage void