* [PATCH -next] userfaultfd: remove set but not used variable 'h'
@ 2019-10-09 12:27 YueHaibing
2019-10-10 0:45 ` Mike Kravetz
0 siblings, 1 reply; 7+ messages in thread
From: YueHaibing @ 2019-10-09 12:27 UTC (permalink / raw)
To: Andrea Arcangeli, Joel Fernandes (Google),
Andrew Morton, Mike Kravetz, Stephen Rothwell, Wei Yang,
Hugh Dickins
Cc: YueHaibing, linux-mm, linux-kernel, kernel-janitors
Fixes gcc '-Wunused-but-set-variable' warning:
mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb':
mm/userfaultfd.c:217:17: warning:
variable 'h' set but not used [-Wunused-but-set-variable]
It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize
for all huge page size calculation")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
mm/userfaultfd.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index 4cb4ef3d9128..1b0d7abad1d4 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -214,7 +214,6 @@ static __always_inline ssize_t __mcopy_atomic_hugetlb(struct mm_struct *dst_mm,
unsigned long src_addr, dst_addr;
long copied;
struct page *page;
- struct hstate *h;
unsigned long vma_hpagesize;
pgoff_t idx;
u32 hash;
@@ -271,8 +270,6 @@ static __always_inline ssize_t __mcopy_atomic_hugetlb(struct mm_struct *dst_mm,
goto out_unlock;
}
- h = hstate_vma(dst_vma);
-
while (src_addr < src_start + len) {
pte_t dst_pteval;
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH -next] userfaultfd: remove set but not used variable 'h'
2019-10-09 12:27 [PATCH -next] userfaultfd: remove set but not used variable 'h' YueHaibing
@ 2019-10-10 0:45 ` Mike Kravetz
2019-10-10 1:23 ` Wei Yang
0 siblings, 1 reply; 7+ messages in thread
From: Mike Kravetz @ 2019-10-10 0:45 UTC (permalink / raw)
To: YueHaibing, Andrea Arcangeli, Joel Fernandes (Google),
Andrew Morton, Stephen Rothwell, Wei Yang, Hugh Dickins
Cc: linux-mm, linux-kernel, kernel-janitors
On 10/9/19 5:27 AM, YueHaibing wrote:
> Fixes gcc '-Wunused-but-set-variable' warning:
>
> mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb':
> mm/userfaultfd.c:217:17: warning:
> variable 'h' set but not used [-Wunused-but-set-variable]
>
> It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize
> for all huge page size calculation")
>
Thanks! That should have been removed with the recent cleanups.
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
--
Mike Kravetz
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH -next] userfaultfd: remove set but not used variable 'h'
2019-10-10 0:45 ` Mike Kravetz
@ 2019-10-10 1:23 ` Wei Yang
2019-10-10 2:25 ` Mike Kravetz
0 siblings, 1 reply; 7+ messages in thread
From: Wei Yang @ 2019-10-10 1:23 UTC (permalink / raw)
To: Mike Kravetz
Cc: YueHaibing, Andrea Arcangeli, Joel Fernandes (Google),
Andrew Morton, Stephen Rothwell, Wei Yang, Hugh Dickins,
linux-mm, linux-kernel, kernel-janitors
On Wed, Oct 09, 2019 at 05:45:57PM -0700, Mike Kravetz wrote:
>On 10/9/19 5:27 AM, YueHaibing wrote:
>> Fixes gcc '-Wunused-but-set-variable' warning:
>>
>> mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb':
>> mm/userfaultfd.c:217:17: warning:
>> variable 'h' set but not used [-Wunused-but-set-variable]
>>
>> It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize
>> for all huge page size calculation")
>>
>
>Thanks! That should have been removed with the recent cleanups.
>
>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>
>Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
If I am correct, this is removed in a recent patch.
>--
>Mike Kravetz
--
Wei Yang
Help you, Help me
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH -next] userfaultfd: remove set but not used variable 'h'
2019-10-10 1:23 ` Wei Yang
@ 2019-10-10 2:25 ` Mike Kravetz
2019-10-10 3:30 ` Wei Yang
0 siblings, 1 reply; 7+ messages in thread
From: Mike Kravetz @ 2019-10-10 2:25 UTC (permalink / raw)
To: Wei Yang
Cc: YueHaibing, Andrea Arcangeli, Joel Fernandes (Google),
Andrew Morton, Stephen Rothwell, Hugh Dickins, linux-mm,
linux-kernel, kernel-janitors
On 10/9/19 6:23 PM, Wei Yang wrote:
> On Wed, Oct 09, 2019 at 05:45:57PM -0700, Mike Kravetz wrote:
>> On 10/9/19 5:27 AM, YueHaibing wrote:
>>> Fixes gcc '-Wunused-but-set-variable' warning:
>>>
>>> mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb':
>>> mm/userfaultfd.c:217:17: warning:
>>> variable 'h' set but not used [-Wunused-but-set-variable]
>>>
>>> It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize
>>> for all huge page size calculation")
>>>
>>
>> Thanks! That should have been removed with the recent cleanups.
>>
>>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>>
>> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
>
> If I am correct, this is removed in a recent patch.
I'm having a hard time figuring out what is actually in the latest mmotm
tree. Andrew added a build fixup patch ab169389eb5 in linux-next which
adds the reference to h. Is there a patch after that to remove the reference?
--
Mike Kravetz
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH -next] userfaultfd: remove set but not used variable 'h'
2019-10-10 2:25 ` Mike Kravetz
@ 2019-10-10 3:30 ` Wei Yang
2019-10-10 3:42 ` Mike Kravetz
0 siblings, 1 reply; 7+ messages in thread
From: Wei Yang @ 2019-10-10 3:30 UTC (permalink / raw)
To: Mike Kravetz
Cc: Wei Yang, YueHaibing, Andrea Arcangeli, Joel Fernandes (Google),
Andrew Morton, Stephen Rothwell, Hugh Dickins, linux-mm,
linux-kernel, kernel-janitors
On Wed, Oct 09, 2019 at 07:25:18PM -0700, Mike Kravetz wrote:
>On 10/9/19 6:23 PM, Wei Yang wrote:
>> On Wed, Oct 09, 2019 at 05:45:57PM -0700, Mike Kravetz wrote:
>>> On 10/9/19 5:27 AM, YueHaibing wrote:
>>>> Fixes gcc '-Wunused-but-set-variable' warning:
>>>>
>>>> mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb':
>>>> mm/userfaultfd.c:217:17: warning:
>>>> variable 'h' set but not used [-Wunused-but-set-variable]
>>>>
>>>> It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize
>>>> for all huge page size calculation")
>>>>
>>>
>>> Thanks! That should have been removed with the recent cleanups.
>>>
>>>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>>>
>>> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
>>
>> If I am correct, this is removed in a recent patch.
>
>I'm having a hard time figuring out what is actually in the latest mmotm
>tree. Andrew added a build fixup patch ab169389eb5 in linux-next which
>adds the reference to h. Is there a patch after that to remove the reference?
>
I checked linux-next tree, this commit removes the reference.
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=add4eaeef3766b7491d70d473c48c0b6d6ca5cb7
>--
>Mike Kravetz
--
Wei Yang
Help you, Help me
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH -next] userfaultfd: remove set but not used variable 'h'
2019-10-10 3:30 ` Wei Yang
@ 2019-10-10 3:42 ` Mike Kravetz
2019-10-10 3:53 ` Wei Yang
0 siblings, 1 reply; 7+ messages in thread
From: Mike Kravetz @ 2019-10-10 3:42 UTC (permalink / raw)
To: Wei Yang
Cc: YueHaibing, Andrea Arcangeli, Joel Fernandes (Google),
Andrew Morton, Stephen Rothwell, Hugh Dickins, linux-mm,
linux-kernel, kernel-janitors
On 10/9/19 8:30 PM, Wei Yang wrote:
> On Wed, Oct 09, 2019 at 07:25:18PM -0700, Mike Kravetz wrote:
>> On 10/9/19 6:23 PM, Wei Yang wrote:
>>> On Wed, Oct 09, 2019 at 05:45:57PM -0700, Mike Kravetz wrote:
>>>> On 10/9/19 5:27 AM, YueHaibing wrote:
>>>>> Fixes gcc '-Wunused-but-set-variable' warning:
>>>>>
>>>>> mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb':
>>>>> mm/userfaultfd.c:217:17: warning:
>>>>> variable 'h' set but not used [-Wunused-but-set-variable]
>>>>>
>>>>> It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize
>>>>> for all huge page size calculation")
>>>>>
>>>>
>>>> Thanks! That should have been removed with the recent cleanups.
>>>>
>>>>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>>>>
>>>> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
>>>
>>> If I am correct, this is removed in a recent patch.
>>
>> I'm having a hard time figuring out what is actually in the latest mmotm
>> tree. Andrew added a build fixup patch ab169389eb5 in linux-next which
>> adds the reference to h. Is there a patch after that to remove the reference?
>>
>
> I checked linux-next tree, this commit removes the reference.
>
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=add4eaeef3766b7491d70d473c48c0b6d6ca5cb7
>
Yes, but unless I am mistaken this adds it back,
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ab169389eb5ff9da7113a21737574edc6d22c072
--
Mike Kravetz
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH -next] userfaultfd: remove set but not used variable 'h'
2019-10-10 3:42 ` Mike Kravetz
@ 2019-10-10 3:53 ` Wei Yang
0 siblings, 0 replies; 7+ messages in thread
From: Wei Yang @ 2019-10-10 3:53 UTC (permalink / raw)
To: Mike Kravetz
Cc: Wei Yang, YueHaibing, Andrea Arcangeli, Joel Fernandes (Google),
Andrew Morton, Stephen Rothwell, Hugh Dickins, linux-mm,
linux-kernel, kernel-janitors
On Wed, Oct 09, 2019 at 08:42:46PM -0700, Mike Kravetz wrote:
>On 10/9/19 8:30 PM, Wei Yang wrote:
>> On Wed, Oct 09, 2019 at 07:25:18PM -0700, Mike Kravetz wrote:
>>> On 10/9/19 6:23 PM, Wei Yang wrote:
>>>> On Wed, Oct 09, 2019 at 05:45:57PM -0700, Mike Kravetz wrote:
>>>>> On 10/9/19 5:27 AM, YueHaibing wrote:
>>>>>> Fixes gcc '-Wunused-but-set-variable' warning:
>>>>>>
>>>>>> mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb':
>>>>>> mm/userfaultfd.c:217:17: warning:
>>>>>> variable 'h' set but not used [-Wunused-but-set-variable]
>>>>>>
>>>>>> It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize
>>>>>> for all huge page size calculation")
>>>>>>
>>>>>
>>>>> Thanks! That should have been removed with the recent cleanups.
>>>>>
>>>>>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>>>>>
>>>>> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
>>>>
>>>> If I am correct, this is removed in a recent patch.
>>>
>>> I'm having a hard time figuring out what is actually in the latest mmotm
>>> tree. Andrew added a build fixup patch ab169389eb5 in linux-next which
>>> adds the reference to h. Is there a patch after that to remove the reference?
>>>
>>
>> I checked linux-next tree, this commit removes the reference.
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=add4eaeef3766b7491d70d473c48c0b6d6ca5cb7
>>
>
>Yes, but unless I am mistaken this adds it back,
>
>https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ab169389eb5ff9da7113a21737574edc6d22c072
>
Oops, we may leave this to Andrew.
>--
>Mike Kravetz
--
Wei Yang
Help you, Help me
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2019-10-10 3:53 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-09 12:27 [PATCH -next] userfaultfd: remove set but not used variable 'h' YueHaibing
2019-10-10 0:45 ` Mike Kravetz
2019-10-10 1:23 ` Wei Yang
2019-10-10 2:25 ` Mike Kravetz
2019-10-10 3:30 ` Wei Yang
2019-10-10 3:42 ` Mike Kravetz
2019-10-10 3:53 ` Wei Yang
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).