linux-kernel - [PATCH 10/11] x86: Remove the definition of SWAPGS

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Date:   Wed,  8 Dec 2021 19:08:32 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     x86@...nel.org, xen-devel@...ts.xenproject.org,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Juergen Gross <jgross@...e.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        "Kirill A. Shutemov" <kirill@...temov.name>
Subject: [PATCH 10/11] x86: Remove the definition of SWAPGS

From: Lai Jiangshan <laijs@...ux.alibaba.com>

There is no user of the pv-aware SWAPGS anymore.

Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 arch/x86/include/asm/irqflags.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/include/asm/irqflags.h b/arch/x86/include/asm/irqflags.h
index 87761396e8cc..ac2e4cc47210 100644
--- a/arch/x86/include/asm/irqflags.h
+++ b/arch/x86/include/asm/irqflags.h
@@ -140,13 +140,11 @@ static __always_inline void arch_local_irq_restore(unsigned long flags)
 #else
 #ifdef CONFIG_X86_64
 #ifdef CONFIG_XEN_PV
-#define SWAPGS	ALTERNATIVE "swapgs", "", X86_FEATURE_XENPV
 #define INTERRUPT_RETURN						\
 	ANNOTATE_RETPOLINE_SAFE;					\
 	ALTERNATIVE_TERNARY("jmp *paravirt_iret(%rip);",		\
 		X86_FEATURE_XENPV, "jmp xen_iret;", "jmp native_iret;")
 #else
-#define SWAPGS	swapgs
 #define INTERRUPT_RETURN	jmp native_iret
 #endif
 #endif
-- 
2.19.1.6.gb485710b