linux-kernel - [PATCH 4/5] x86: remove x86_test_and_clear_bit

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Message-Id: <b334ae6819507e3dfc0a4b33ed974714d067eb4a.1479449716.git.len.brown@intel.com>
Date:   Fri, 18 Nov 2016 01:23:20 -0500
From:   Len Brown <lenb@...nel.org>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>
Subject: [PATCH 4/5] x86: remove x86_test_and_clear_bit_percpu()

From: Len Brown <len.brown@...el.com>

Upon removal of the "is_idle" flag, x86_test_and_clear_bit_percpu()
is no longer used.

Signed-off-by: Len Brown <len.brown@...el.com>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 arch/x86/include/asm/percpu.h | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 84f58de08c2b..9fa03604b2b3 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -507,17 +507,6 @@ do {									\
 
 #endif
 
-/* This is not atomic against other CPUs -- CPU preemption needs to be off */
-#define x86_test_and_clear_bit_percpu(bit, var)				\
-({									\
-	bool old__;							\
-	asm volatile("btr %2,"__percpu_arg(1)"\n\t"			\
-		     CC_SET(c)						\
-		     : CC_OUT(c) (old__), "+m" (var)			\
-		     : "dIr" (bit));					\
-	old__;								\
-})
-
 static __always_inline bool x86_this_cpu_constant_test_bit(unsigned int nr,
                         const unsigned long __percpu *addr)
 {
-- 
2.11.0.rc1