* [PATCH] xen: remove unnecessary condition check before kfree
@ 2018-09-08 14:18 zhong jiang
2018-09-10 9:52 ` Juergen Gross
0 siblings, 1 reply; 3+ messages in thread
From: zhong jiang @ 2018-09-08 14:18 UTC (permalink / raw)
To: boris.ostrovsky, jgross; +Cc: xen-devel, linux-kernel
kfree has taken null pointer into account. So just remove the
condition check before kfree.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
drivers/xen/xen-acpi-processor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
index fbb9137..7e1d49e 100644
--- a/drivers/xen/xen-acpi-processor.c
+++ b/drivers/xen/xen-acpi-processor.c
@@ -268,7 +268,7 @@ static int push_pxx_to_hypervisor(struct acpi_processor *_pr)
pr_warn("(_PXX): Hypervisor error (%d) for ACPI CPU%u\n",
ret, _pr->acpi_id);
err_free:
- if (!IS_ERR_OR_NULL(dst_states))
+ if (!IS_ERR(dst_states))
kfree(dst_states);
return ret;
--
1.7.12.4
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] xen: remove unnecessary condition check before kfree
2018-09-08 14:18 [PATCH] xen: remove unnecessary condition check before kfree zhong jiang
@ 2018-09-10 9:52 ` Juergen Gross
2018-09-10 13:52 ` zhong jiang
0 siblings, 1 reply; 3+ messages in thread
From: Juergen Gross @ 2018-09-10 9:52 UTC (permalink / raw)
To: zhong jiang, boris.ostrovsky; +Cc: xen-devel, linux-kernel
On 08/09/18 16:18, zhong jiang wrote:
> kfree has taken null pointer into account. So just remove the
> condition check before kfree.
>
> Signed-off-by: zhong jiang <zhongjiang@huawei.com>
> ---
> drivers/xen/xen-acpi-processor.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
> index fbb9137..7e1d49e 100644
> --- a/drivers/xen/xen-acpi-processor.c
> +++ b/drivers/xen/xen-acpi-processor.c
> @@ -268,7 +268,7 @@ static int push_pxx_to_hypervisor(struct acpi_processor *_pr)
> pr_warn("(_PXX): Hypervisor error (%d) for ACPI CPU%u\n",
> ret, _pr->acpi_id);
> err_free:
> - if (!IS_ERR_OR_NULL(dst_states))
> + if (!IS_ERR(dst_states))
This is just a change of the condition, not a removal.
I don't think change is worth it.
Juergen
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] xen: remove unnecessary condition check before kfree
2018-09-10 9:52 ` Juergen Gross
@ 2018-09-10 13:52 ` zhong jiang
0 siblings, 0 replies; 3+ messages in thread
From: zhong jiang @ 2018-09-10 13:52 UTC (permalink / raw)
To: Juergen Gross; +Cc: boris.ostrovsky, xen-devel, linux-kernel
On 2018/9/10 17:52, Juergen Gross wrote:
> On 08/09/18 16:18, zhong jiang wrote:
>> kfree has taken null pointer into account. So just remove the
>> condition check before kfree.
>>
>> Signed-off-by: zhong jiang <zhongjiang@huawei.com>
>> ---
>> drivers/xen/xen-acpi-processor.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
>> index fbb9137..7e1d49e 100644
>> --- a/drivers/xen/xen-acpi-processor.c
>> +++ b/drivers/xen/xen-acpi-processor.c
>> @@ -268,7 +268,7 @@ static int push_pxx_to_hypervisor(struct acpi_processor *_pr)
>> pr_warn("(_PXX): Hypervisor error (%d) for ACPI CPU%u\n",
>> ret, _pr->acpi_id);
>> err_free:
>> - if (!IS_ERR_OR_NULL(dst_states))
>> + if (!IS_ERR(dst_states))
> This is just a change of the condition, not a removal.
>
> I don't think change is worth it.
>
Fine, I just consider the duplication of function. Of course. make sense you have said.
Maybe it will more clear to have the judgement.
Thanks,
zhong jiang
> Juergen
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2018-09-10 13:53 UTC | newest]
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2018-09-08 14:18 [PATCH] xen: remove unnecessary condition check before kfree zhong jiang
2018-09-10 9:52 ` Juergen Gross
2018-09-10 13:52 ` zhong jiang
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