[PATCH] x86/kvm: remove unused macro HV_CLOCK_SIZE

[PATCH] x86/kvm: remove unused macro HV_CLOCK_SIZE

[Alex Shi]

This macro is useless, and could cause gcc warning:
arch/x86/kernel/kvmclock.c:47:0: warning: macro "HV_CLOCK_SIZE" is not
used [-Wunused-macros]
Let's remove it.

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Paolo Bonzini <pbonzini@redhat.com> 
Cc: Sean Christopherson <sean.j.christopherson@intel.com> 
Cc: Vitaly Kuznetsov <vkuznets@redhat.com> 
Cc: Wanpeng Li <wanpengli@tencent.com> 
Cc: Jim Mattson <jmattson@google.com> 
Cc: Joerg Roedel <joro@8bytes.org> 
Cc: Thomas Gleixner <tglx@linutronix.de> 
Cc: Ingo Molnar <mingo@redhat.com> 
Cc: Borislav Petkov <bp@alien8.de> 
Cc: x86@kernel.org 
Cc: "H. Peter Anvin" <hpa@zytor.com> 
Cc: kvm@vger.kernel.org 
Cc: linux-kernel@vger.kernel.org 
---
 arch/x86/kernel/kvmclock.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index 34b18f6eeb2c..aa593743acf6 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -44,7 +44,6 @@ static int __init parse_no_kvmclock_vsyscall(char *arg)
 early_param("no-kvmclock-vsyscall", parse_no_kvmclock_vsyscall);
 
 /* Aligned to page sizes to match whats mapped via vsyscalls to userspace */
-#define HV_CLOCK_SIZE	(sizeof(struct pvclock_vsyscall_time_info) * NR_CPUS)
 #define HVC_BOOT_ARRAY_SIZE \
 	(PAGE_SIZE / sizeof(struct pvclock_vsyscall_time_info))
 
-- 
1.8.3.1

Re: [PATCH] x86/kvm: remove unused macro HV_CLOCK_SIZE

[Vitaly Kuznetsov]

Alex Shi <alex.shi@linux.alibaba.com> writes:

> This macro is useless, and could cause gcc warning:
> arch/x86/kernel/kvmclock.c:47:0: warning: macro "HV_CLOCK_SIZE" is not
> used [-Wunused-macros]
> Let's remove it.
>
> Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com> 
> Cc: Sean Christopherson <sean.j.christopherson@intel.com> 
> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> 
> Cc: Wanpeng Li <wanpengli@tencent.com> 
> Cc: Jim Mattson <jmattson@google.com> 
> Cc: Joerg Roedel <joro@8bytes.org> 
> Cc: Thomas Gleixner <tglx@linutronix.de> 
> Cc: Ingo Molnar <mingo@redhat.com> 
> Cc: Borislav Petkov <bp@alien8.de> 
> Cc: x86@kernel.org 
> Cc: "H. Peter Anvin" <hpa@zytor.com> 
> Cc: kvm@vger.kernel.org 
> Cc: linux-kernel@vger.kernel.org 
> ---
>  arch/x86/kernel/kvmclock.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
> index 34b18f6eeb2c..aa593743acf6 100644
> --- a/arch/x86/kernel/kvmclock.c
> +++ b/arch/x86/kernel/kvmclock.c
> @@ -44,7 +44,6 @@ static int __init parse_no_kvmclock_vsyscall(char *arg)
>  early_param("no-kvmclock-vsyscall", parse_no_kvmclock_vsyscall);
>  
>  /* Aligned to page sizes to match whats mapped via vsyscalls to userspace */
> -#define HV_CLOCK_SIZE	(sizeof(struct pvclock_vsyscall_time_info) * NR_CPUS)
>  #define HVC_BOOT_ARRAY_SIZE \
>  	(PAGE_SIZE / sizeof(struct pvclock_vsyscall_time_info))

Fixes: 95a3d4454bb1 ("x86/kvmclock: Switch kvmclock data to a PER_CPU variable")

where the last and the only user was removed.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

-- 
Vitaly