linux-kernel - [PATCH 1/5] KVM: x86: Clean up redundant mod

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Message-Id: <20210809093410.59304-2-likexu@tencent.com>
Date:   Mon,  9 Aug 2021 17:34:06 +0800
From:   Like Xu <like.xu.linux@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, Ingo Molnar <mingo@...hat.com>,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] KVM: x86: Clean up redundant mod_64(x, y) macro definition

From: Like Xu <likexu@...cent.com>

The mod_64(x, y) macro is only defined and used in the kvm/x86 context.
It's safe to move the definition of mod_64(x, y) from x86/{i8254lapic}.c
to the generic x86.h without any intended functional change.

Signed-off-by: Like Xu <likexu@...cent.com>
---
 arch/x86/kvm/i8254.c | 6 ------
 arch/x86/kvm/lapic.c | 6 ------
 arch/x86/kvm/x86.h   | 6 ++++++
 3 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 5a69cce4d72d..81d2ba064dc3 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -40,12 +40,6 @@
 #include "i8254.h"
 #include "x86.h"
 
-#ifndef CONFIG_X86_64
-#define mod_64(x, y) ((x) - (y) * div64_u64(x, y))
-#else
-#define mod_64(x, y) ((x) % (y))
-#endif
-
 #define RW_STATE_LSB 1
 #define RW_STATE_MSB 2
 #define RW_STATE_WORD0 3
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 76fb00921203..6b3d8feac1d0 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -42,12 +42,6 @@
 #include "cpuid.h"
 #include "hyperv.h"
 
-#ifndef CONFIG_X86_64
-#define mod_64(x, y) ((x) - (y) * div64_u64(x, y))
-#else
-#define mod_64(x, y) ((x) % (y))
-#endif
-
 #define PRId64 "d"
 #define PRIx64 "llx"
 #define PRIu64 "u"
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 44ae10312740..6aac4a901b65 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -8,6 +8,12 @@
 #include "kvm_cache_regs.h"
 #include "kvm_emulate.h"
 
+#ifndef CONFIG_X86_64
+#define mod_64(x, y) ((x) - (y) * div64_u64(x, y))
+#else
+#define mod_64(x, y) ((x) % (y))
+#endif
+
 static __always_inline void kvm_guest_enter_irqoff(void)
 {
 	/*
-- 
2.32.0