* [PATCH] kvm: i8254: remove redundant assignment to pointer s
@ 2020-06-09 23:31 Colin King
2020-06-10 8:32 ` Vitaly Kuznetsov
0 siblings, 1 reply; 2+ messages in thread
From: Colin King @ 2020-06-09 23:31 UTC (permalink / raw)
To: Paolo Bonzini, Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li,
Jim Mattson, Joerg Roedel, Thomas Gleixner, Ingo Molnar,
Borislav Petkov, x86, H . Peter Anvin, kvm
Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
The pointer s is being assigned a value that is never read, the
assignment is redundant and can be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
arch/x86/kvm/i8254.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index febca334c320..a6e218c6140d 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -462,7 +462,6 @@ static int pit_ioport_write(struct kvm_vcpu *vcpu,
if (channel == 3) {
/* Read-Back Command. */
for (channel = 0; channel < 3; channel++) {
- s = &pit_state->channels[channel];
if (val & (2 << channel)) {
if (!(val & 0x20))
pit_latch_count(pit, channel);
--
2.27.0.rc0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] kvm: i8254: remove redundant assignment to pointer s
2020-06-09 23:31 [PATCH] kvm: i8254: remove redundant assignment to pointer s Colin King
@ 2020-06-10 8:32 ` Vitaly Kuznetsov
0 siblings, 0 replies; 2+ messages in thread
From: Vitaly Kuznetsov @ 2020-06-10 8:32 UTC (permalink / raw)
To: Colin King
Cc: kernel-janitors, linux-kernel, Paolo Bonzini,
Sean Christopherson, Wanpeng Li, Jim Mattson, Joerg Roedel,
Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86,
H . Peter Anvin, kvm
Colin King <colin.king@canonical.com> writes:
> From: Colin Ian King <colin.king@canonical.com>
>
> The pointer s is being assigned a value that is never read, the
> assignment is redundant and can be removed.
>
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
It seems it wasn't used since the very beginning,
Fixes: 7837699fa6d7 ("KVM: In kernel PIT model")
QEMU code (from where KVM's implementation originates), however,
does make use of 's' here as it open codes pit_latch_status().
> ---
> arch/x86/kvm/i8254.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
> index febca334c320..a6e218c6140d 100644
> --- a/arch/x86/kvm/i8254.c
> +++ b/arch/x86/kvm/i8254.c
> @@ -462,7 +462,6 @@ static int pit_ioport_write(struct kvm_vcpu *vcpu,
> if (channel == 3) {
> /* Read-Back Command. */
> for (channel = 0; channel < 3; channel++) {
> - s = &pit_state->channels[channel];
> if (val & (2 << channel)) {
> if (!(val & 0x20))
> pit_latch_count(pit, channel);
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
--
Vitaly
^ permalink raw reply [flat|nested] 2+ messages in thread
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