linux-kernel - [PATCH v3 10/11] x86/percpu: Remove unused PER

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Date:   Mon, 20 Jul 2020 13:49:24 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>
Cc:     Dennis Zhou <dennis@...nel.org>, Tejun Heo <tj@...nel.org>,
        Christoph Lameter <cl@...ux.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        Brian Gerst <brgerst@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH v3 10/11] x86/percpu: Remove unused PER_CPU() macro

From: Brian Gerst <brgerst@...il.com>

Also remove now unused __percpu_mov_op.

Tested-by: Nick Desaulniers <ndesaulniers@...gle.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Brian Gerst <brgerst@...il.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>
---
 arch/x86/include/asm/percpu.h | 18 ------------------
 1 file changed, 18 deletions(-)

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index cf2b9c2a241e..a3c33b79fb86 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -4,33 +4,15 @@
 
 #ifdef CONFIG_X86_64
 #define __percpu_seg		gs
-#define __percpu_mov_op		movq
 #else
 #define __percpu_seg		fs
-#define __percpu_mov_op		movl
 #endif
 
 #ifdef __ASSEMBLY__
 
-/*
- * PER_CPU finds an address of a per-cpu variable.
- *
- * Args:
- *    var - variable name
- *    reg - 32bit register
- *
- * The resulting address is stored in the "reg" argument.
- *
- * Example:
- *    PER_CPU(cpu_gdt_descr, %ebx)
- */
 #ifdef CONFIG_SMP
-#define PER_CPU(var, reg)						\
-	__percpu_mov_op %__percpu_seg:this_cpu_off, reg;		\
-	lea var(reg), reg
 #define PER_CPU_VAR(var)	%__percpu_seg:var
 #else /* ! SMP */
-#define PER_CPU(var, reg)	__percpu_mov_op $var, reg
 #define PER_CPU_VAR(var)	var
 #endif	/* SMP */
 
-- 
2.28.0.rc0.105.gf9edc3c819-goog