From: Baolin Wang <baolin.wang@linux.alibaba.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Will Deacon <will@kernel.org>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: Re: linux-next: build failure after merge of the mm tree
Date: Thu, 12 May 2022 19:13:18 +0800 [thread overview]
Message-ID: <188f7cb2-ba21-a53a-828d-7242b17b0c72@linux.alibaba.com> (raw)
In-Reply-To: <YnzqffV7STYS24Yn@arm.com>
On 5/12/2022 7:07 PM, Catalin Marinas wrote:
> On Thu, May 12, 2022 at 07:38:55PM +1000, Stephen Rothwell wrote:
>> After merging the mm tree, today's linux-next build (arm64 defconfig)
>> failed like this:
>>
>> arch/arm64/mm/hugetlbpage.c: In function 'huge_ptep_clear_flush':
>> arch/arm64/mm/hugetlbpage.c:493:16: error: implicit declaration of function 'get_clear_flush'; did you mean 'ptep_clear_flush'? [-Werror=implicit-function-declaration]
>> 493 | return get_clear_flush(vma->vm_mm, addr, ptep, pgsize, ncontig);
>> | ^~~~~~~~~~~~~~~
>> | ptep_clear_flush
>> arch/arm64/mm/hugetlbpage.c:493:16: error: incompatible types when returning type 'int' but 'pte_t' was expected
>> 493 | return get_clear_flush(vma->vm_mm, addr, ptep, pgsize, ncontig);
>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/mm/hugetlbpage.c:494:1: error: control reaches end of non-void function [-Werror=return-type]
>> 494 | }
>> | ^
>>
>> Caused by commit
>>
>> 00df1f1a133b ("mm: change huge_ptep_clear_flush() to return the original pte")
>>
>> interacting with commit
>>
>> fb396bb459c1 ("arm64/hugetlb: Drop TLB flush from get_clear_flush()")
>>
>> I have applied the following merg fix patch for today.
>>
>> From: Stephen Rothwell <sfr@canb.auug.org.au>
>> Date: Thu, 12 May 2022 19:33:11 +1000
>> Subject: [PATCH] fixup for "mm: change huge_ptep_clear_flush() to return the original pte"
>>
>> It interacts with commit
>>
>> fb396bb459c1 ("arm64/hugetlb: Drop TLB flush from get_clear_flush()")
>>
>> from the arm64 tree
>>
>> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
>> ---
>> arch/arm64/mm/hugetlbpage.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
>> index 5bdf913dedc7..30f5b76aabe9 100644
>> --- a/arch/arm64/mm/hugetlbpage.c
>> +++ b/arch/arm64/mm/hugetlbpage.c
>> @@ -490,7 +490,7 @@ pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
>> return ptep_clear_flush(vma, addr, ptep);
>>
>> ncontig = find_num_contig(vma->vm_mm, addr, ptep, &pgsize);
>> - return get_clear_flush(vma->vm_mm, addr, ptep, pgsize, ncontig);
>> + return get_clear_contig(vma->vm_mm, addr, ptep, pgsize, ncontig);
>> }
>
> Note that after the arm64 commit, get_clear_contig() no longer flushes
> the TLB. So maybe something like:
>
> diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
> index 30f5b76aabe9..9a999550df8e 100644
> --- a/arch/arm64/mm/hugetlbpage.c
> +++ b/arch/arm64/mm/hugetlbpage.c
> @@ -485,12 +485,15 @@ pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
> {
> size_t pgsize;
> int ncontig;
> + pte_t orig_pte;
>
> if (!pte_cont(READ_ONCE(*ptep)))
> return ptep_clear_flush(vma, addr, ptep);
>
> ncontig = find_num_contig(vma->vm_mm, addr, ptep, &pgsize);
> - return get_clear_contig(vma->vm_mm, addr, ptep, pgsize, ncontig);
> + orig_pte = get_clear_contig(vma->vm_mm, addr, ptep, pgsize, ncontig);
> + flush_tlb_range(vma, addr, addr + pgsize * ncontig);
> + return orig_pte;
> }
Yes, after checking this fb396bb459c1 ("arm64/hugetlb: Drop TLB flush
from get_clear_flush()"), I also realized it will miss TLB flush.
So I am not sure I need send a incremental patch to fix this issue? Or
resend my patch set [1] with rebasing on the arm64 changes?
Catalin and Andrew, how do you think? Thanks.
[1]
https://lore.kernel.org/all/cover.1652270205.git.baolin.wang@linux.alibaba.com/
next prev parent reply other threads:[~2022-05-12 11:12 UTC|newest]
Thread overview: 141+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-12 9:38 linux-next: build failure after merge of the mm tree Stephen Rothwell
2022-05-12 10:13 ` Baolin Wang
2022-05-12 11:07 ` Catalin Marinas
2022-05-12 11:13 ` Baolin Wang [this message]
2022-05-12 13:28 ` Catalin Marinas
2022-05-12 19:10 ` Andrew Morton
2022-05-13 7:18 ` Stephen Rothwell
-- strict thread matches above, loose matches on Subject: below --
2024-04-30 0:38 Stephen Rothwell
2024-04-30 2:23 ` Lance Yang
2024-04-23 0:22 Stephen Rothwell
2024-04-12 6:39 Stephen Rothwell
2024-04-11 23:14 Stephen Rothwell
2024-04-07 23:15 Stephen Rothwell
2024-04-08 1:44 ` Barry Song
2024-04-05 2:55 Stephen Rothwell
2024-03-28 4:34 Stephen Rothwell
2024-03-05 4:26 Stephen Rothwell
2024-03-05 6:39 ` Qi Zheng
2024-02-14 3:57 Stephen Rothwell
2024-02-14 15:19 ` Andrew Morton
2024-02-15 3:47 ` Stephen Rothwell
2024-02-07 6:17 Stephen Rothwell
2024-02-01 2:57 Stephen Rothwell
2024-02-01 8:35 ` Marco Elver
2024-01-25 3:29 Stephen Rothwell
2024-01-25 14:29 ` Baoquan He
2024-01-25 18:03 ` Stephen Rothwell
2024-01-24 23:23 Stephen Rothwell
2024-01-24 23:52 ` Suren Baghdasaryan
2024-01-25 2:40 ` Baoquan He
2024-01-23 23:05 Stephen Rothwell
2024-01-23 23:14 ` Suren Baghdasaryan
2023-12-21 7:38 Stephen Rothwell
2023-12-21 7:45 ` Changbin Du
2023-11-28 21:45 Stephen Rothwell
2023-11-28 22:45 ` Andrew Morton
2023-11-29 8:17 ` Dmitry Rokosov
2023-11-30 22:12 ` Stephen Rothwell
2023-11-27 3:44 Stephen Rothwell
2023-12-22 0:16 ` Stephen Rothwell
2023-12-22 6:26 ` Andrew Morton
2023-11-27 2:28 Stephen Rothwell
2023-11-27 3:48 ` Stephen Rothwell
2023-11-30 22:04 ` Stephen Rothwell
2023-11-30 22:32 ` Andrew Morton
2023-11-30 22:39 ` Michael Ellerman
2023-11-30 22:52 ` Andrew Morton
2023-12-01 3:12 ` Michael Ellerman
2023-12-07 12:38 ` Michael Ellerman
2023-10-03 22:50 Stephen Rothwell
2023-09-27 23:22 Stephen Rothwell
2023-09-28 6:47 ` Arnd Bergmann
2023-09-25 23:18 Stephen Rothwell
2023-08-22 22:52 Stephen Rothwell
2023-08-21 23:55 Stephen Rothwell
2023-08-22 1:11 ` Matthew Wilcox
2023-08-22 1:22 ` Stephen Rothwell
2023-08-22 1:34 ` Matthew Wilcox
2023-08-22 4:00 ` Darrick J. Wong
2023-08-22 20:20 ` Matthew Wilcox
2023-08-22 7:12 ` Michael Ellerman
2023-08-08 4:40 Stephen Rothwell
2023-08-08 15:20 ` Eric DeVolder
2023-08-11 17:16 ` Eric DeVolder
2023-07-26 5:14 Stephen Rothwell
2023-07-26 13:22 ` Kuan-Ying Lee (李冠穎)
2023-07-26 4:53 Stephen Rothwell
2023-07-26 5:22 ` Aneesh Kumar K.V
2023-07-26 6:51 ` Stephen Rothwell
2023-07-19 4:32 Stephen Rothwell
2023-07-19 5:55 ` Alistair Popple
2023-07-18 0:02 Stephen Rothwell
2023-07-18 13:43 ` Andy Shevchenko
2023-07-18 17:34 ` Andrew Morton
2023-07-18 21:07 ` Andy Shevchenko
2023-07-17 23:40 Stephen Rothwell
2023-07-04 2:23 Stephen Rothwell
2023-07-04 2:32 ` Linus Torvalds
2023-07-04 5:51 ` Suren Baghdasaryan
2023-06-13 6:21 Stephen Rothwell
2023-06-13 15:58 ` Catalin Marinas
2023-05-19 2:43 Stephen Rothwell
2023-05-19 8:19 ` Arnd Bergmann
2023-05-17 23:59 Stephen Rothwell
2023-03-06 2:54 Stephen Rothwell
2023-03-06 3:13 ` Andrew Morton
2023-03-06 0:52 Stephen Rothwell
2023-03-06 21:58 ` Stephen Rothwell
2023-02-07 4:37 Stephen Rothwell
2023-02-07 12:17 ` Jason Gunthorpe
2023-02-08 2:41 ` Stephen Rothwell
2023-02-07 14:25 ` David Howells
2023-01-30 5:14 Stephen Rothwell
2023-01-30 8:09 ` Christian Brauner
2023-02-26 22:18 ` Stephen Rothwell
2023-02-27 10:36 ` Christian Brauner
2023-01-27 6:36 Stephen Rothwell
2023-01-27 6:16 Stephen Rothwell
2023-01-27 5:59 Stephen Rothwell
2023-01-27 13:11 ` Jan Kara
2023-01-31 21:47 ` Stephen Rothwell
2023-02-24 4:40 ` Stephen Rothwell
2023-02-24 6:01 ` Linus Torvalds
2023-02-24 20:36 ` Stephen Rothwell
2023-01-25 3:05 Stephen Rothwell
2022-12-16 1:26 Stephen Rothwell
2022-12-16 3:04 ` Andrew Morton
2022-12-16 0:21 Stephen Rothwell
2022-12-16 0:35 ` Andrew Morton
2022-12-16 1:03 ` Masami Hiramatsu
2022-11-22 6:53 Stephen Rothwell
2022-11-22 10:31 ` David Hildenbrand
2022-11-03 5:02 Stephen Rothwell
2022-11-02 3:55 Stephen Rothwell
2022-11-02 21:26 ` Andrew Morton
2022-10-18 1:24 Stephen Rothwell
2022-09-23 8:12 Stephen Rothwell
2022-09-23 8:15 ` David Hildenbrand
2022-09-23 7:55 Stephen Rothwell
2022-09-23 9:50 ` Michael Walle
2022-09-23 11:01 ` Naoya Horiguchi
2022-09-15 7:07 Stephen Rothwell
2022-09-15 16:37 ` Mike Kravetz
2022-09-15 20:06 ` Andrew Morton
2022-09-06 11:03 Stephen Rothwell
2022-09-06 12:05 ` Rob Clark
2022-09-06 18:05 ` Stephen Rothwell
2022-08-26 7:10 Stephen Rothwell
2022-08-26 7:32 ` Michal Hocko
2022-07-08 9:44 Stephen Rothwell
2022-07-08 15:17 ` Darrick J. Wong
2022-07-10 22:28 ` Stephen Rothwell
2022-05-11 8:15 Stephen Rothwell
2022-05-11 8:27 ` Baolin Wang
2022-05-11 8:42 ` Baolin Wang
2022-05-11 23:28 ` Stephen Rothwell
2022-05-10 11:25 Stephen Rothwell
2022-05-05 21:37 Stephen Rothwell
2022-05-02 10:49 Stephen Rothwell
2022-05-02 11:19 ` Matthew Wilcox
2022-05-03 6:45 ` Stephen Rothwell
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