[tip:x86/cache] x86/resctrl: Use _ASM_BX to avoid ifdeffery

[tip-bot for Uros Bizjak]

Commit-ID:  515f0453752e3daba7c47d37d9172a66509a56fd
Gitweb:     https://git.kernel.org/tip/515f0453752e3daba7c47d37d9172a66509a56fd
Author:     Uros Bizjak <ubizjak@xxxxxxxxx>
AuthorDate: Thu, 6 Jun 2019 22:00:44 +0200
Committer:  Borislav Petkov <bp@xxxxxxx>
CommitDate: Mon, 10 Jun 2019 22:36:38 +0200

x86/resctrl: Use _ASM_BX to avoid ifdeffery

Use the _ASM_BX macro which expands to either %rbx or %ebx, depending on
the 32-bit or 64-bit config selected.

Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Acked-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: x86-ml <x86@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20190606200044.5730-1-ubizjak@xxxxxxxxx
---
 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 */
 
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