linux-kernel - [PATCH] x86/resctrl: Use _ASM_BX to avoid #ifdef CONFIG_X86

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Date:   Thu,  6 Jun 2019 22:00:44 +0200
From:   Uros Bizjak <ubizjak@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Uros Bizjak <ubizjak@...il.com>, Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>, x86@...nel.org
Subject: [PATCH] x86/resctrl: Use _ASM_BX to avoid #ifdef CONFIG_X86_64

Depending on CONFIG_X86_64 _ASM_BX expands to either rbx or ebx.

Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Reinette Chatre <reinette.chatre@...el.com>
Cc: x86@...nel.org
Signed-off-by: Uros Bizjak <ubizjak@...il.com>
---
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index 604c0e3bcc83..09408794eab2 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -431,11 +431,7 @@ static int pseudo_lock_fn(void *_rdtgrp)
 #else
 	register unsigned int line_size asm("esi");
 	register unsigned int size asm("edi");
-#ifdef CONFIG_X86_64
-	register void *mem_r asm("rbx");
-#else
-	register void *mem_r asm("ebx");
-#endif /* CONFIG_X86_64 */
+	register void *mem_r asm(_ASM_BX);
 #endif /* CONFIG_KASAN */
 
 	/*
-- 
2.21.0