* Build failure in -next with get_user_pages_remote() API change
@ 2020-07-10 11:32 Mark Brown
2020-07-10 12:24 ` Peter Xu
0 siblings, 1 reply; 6+ messages in thread
From: Mark Brown @ 2020-07-10 11:32 UTC (permalink / raw)
To: Peter Xu, John Hubbard, Andrew Morton
Cc: Catalin Marinas, linux-next, Will Deacon, linux-arm-kernel, Steven Price
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Today's -next fails to build in various arm64 configs with:
arch/arm64/kernel/mte.c:225:23: error: too many arguments to function call, expected 7, have 8
&page, &vma, NULL);
^~~~
./include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
#define NULL ((void *)0)
^~~~~~~~~~~
./include/linux/mm.h:1705:6: note: 'get_user_pages_remote' declared here
long get_user_pages_remote(struct mm_struct *mm,
^
1 error generated.
caused by b7363b0ab88d66d3c (mm/gup: remove task_struct pointer for all
gup code) which updated the signature of get_user_pages_remote() without
updating the caller in mte.c.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Build failure in -next with get_user_pages_remote() API change
2020-07-10 11:32 Build failure in -next with get_user_pages_remote() API change Mark Brown
@ 2020-07-10 12:24 ` Peter Xu
2020-07-10 13:38 ` Peter Xu
2020-07-10 15:23 ` Catalin Marinas
0 siblings, 2 replies; 6+ messages in thread
From: Peter Xu @ 2020-07-10 12:24 UTC (permalink / raw)
To: Mark Brown
Cc: John Hubbard, Steven Price, linux-next, Catalin Marinas,
Andrew Morton, Will Deacon, linux-arm-kernel
On Fri, Jul 10, 2020 at 12:32:01PM +0100, Mark Brown wrote:
> Today's -next fails to build in various arm64 configs with:
>
> arch/arm64/kernel/mte.c:225:23: error: too many arguments to function call, expected 7, have 8
> &page, &vma, NULL);
> ^~~~
> ./include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
> #define NULL ((void *)0)
> ^~~~~~~~~~~
> ./include/linux/mm.h:1705:6: note: 'get_user_pages_remote' declared here
> long get_user_pages_remote(struct mm_struct *mm,
> ^
> 1 error generated.
>
> caused by b7363b0ab88d66d3c (mm/gup: remove task_struct pointer for all
> gup code) which updated the signature of get_user_pages_remote() without
> updating the caller in mte.c.
We should need to squash into "mm/gup: remove task_struct pointer for all gup
code" with:
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
index 934639ab225d..11e558b02a05 100644
--- a/arch/arm64/kernel/mte.c
+++ b/arch/arm64/kernel/mte.c
@@ -221,7 +221,7 @@ static int __access_remote_tags(struct task_struct *tsk, struct mm_struct *mm,
void *maddr;
struct page *page = NULL;
- ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags,
+ ret = get_user_pages_remote(mm, addr, 1, gup_flags,
&page, &vma, NULL);
if (ret <= 0)
break;
Seems to be a new caller merged recently, so it got left behind during the
rebases... Sorry for not noticing that.
Thanks,
--
Peter Xu
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^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: Build failure in -next with get_user_pages_remote() API change
2020-07-10 12:24 ` Peter Xu
@ 2020-07-10 13:38 ` Peter Xu
2020-07-10 15:23 ` Catalin Marinas
1 sibling, 0 replies; 6+ messages in thread
From: Peter Xu @ 2020-07-10 13:38 UTC (permalink / raw)
To: Mark Brown, Andrew Morton
Cc: John Hubbard, Steven Price, linux-next, Catalin Marinas,
Andrew Morton, Will Deacon, linux-arm-kernel
On Fri, Jul 10, 2020 at 08:24:57AM -0400, Peter Xu wrote:
> On Fri, Jul 10, 2020 at 12:32:01PM +0100, Mark Brown wrote:
> > Today's -next fails to build in various arm64 configs with:
> >
> > arch/arm64/kernel/mte.c:225:23: error: too many arguments to function call, expected 7, have 8
> > &page, &vma, NULL);
> > ^~~~
> > ./include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
> > #define NULL ((void *)0)
> > ^~~~~~~~~~~
> > ./include/linux/mm.h:1705:6: note: 'get_user_pages_remote' declared here
> > long get_user_pages_remote(struct mm_struct *mm,
> > ^
> > 1 error generated.
> >
> > caused by b7363b0ab88d66d3c (mm/gup: remove task_struct pointer for all
> > gup code) which updated the signature of get_user_pages_remote() without
> > updating the caller in mte.c.
>
> We should need to squash into "mm/gup: remove task_struct pointer for all gup
> code" with:
>
> diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
> index 934639ab225d..11e558b02a05 100644
> --- a/arch/arm64/kernel/mte.c
> +++ b/arch/arm64/kernel/mte.c
> @@ -221,7 +221,7 @@ static int __access_remote_tags(struct task_struct *tsk, struct mm_struct *mm,
> void *maddr;
> struct page *page = NULL;
>
> - ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags,
> + ret = get_user_pages_remote(mm, addr, 1, gup_flags,
> &page, &vma, NULL);
> if (ret <= 0)
> break;
>
> Seems to be a new caller merged recently, so it got left behind during the
> rebases... Sorry for not noticing that.
Andrew, IIUC this can still have its chance to be squashed into existing
commit, or please let me know if there's anything I can do (resend the affected
last patch, or send a fixup patch, ...). Thanks!
--
Peter Xu
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Build failure in -next with get_user_pages_remote() API change
2020-07-10 12:24 ` Peter Xu
2020-07-10 13:38 ` Peter Xu
@ 2020-07-10 15:23 ` Catalin Marinas
2020-07-10 22:28 ` Andrew Morton
1 sibling, 1 reply; 6+ messages in thread
From: Catalin Marinas @ 2020-07-10 15:23 UTC (permalink / raw)
To: Peter Xu
Cc: John Hubbard, Steven Price, Mark Brown, linux-next,
Andrew Morton, Will Deacon, linux-arm-kernel
On Fri, Jul 10, 2020 at 08:24:57AM -0400, Peter Xu wrote:
> On Fri, Jul 10, 2020 at 12:32:01PM +0100, Mark Brown wrote:
> > Today's -next fails to build in various arm64 configs with:
> >
> > arch/arm64/kernel/mte.c:225:23: error: too many arguments to function call, expected 7, have 8
> > &page, &vma, NULL);
> > ^~~~
> > ./include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
> > #define NULL ((void *)0)
> > ^~~~~~~~~~~
> > ./include/linux/mm.h:1705:6: note: 'get_user_pages_remote' declared here
> > long get_user_pages_remote(struct mm_struct *mm,
> > ^
> > 1 error generated.
> >
> > caused by b7363b0ab88d66d3c (mm/gup: remove task_struct pointer for all
> > gup code) which updated the signature of get_user_pages_remote() without
> > updating the caller in mte.c.
>
> We should need to squash into "mm/gup: remove task_struct pointer for all gup
> code" with:
>
> diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
> index 934639ab225d..11e558b02a05 100644
> --- a/arch/arm64/kernel/mte.c
> +++ b/arch/arm64/kernel/mte.c
> @@ -221,7 +221,7 @@ static int __access_remote_tags(struct task_struct *tsk, struct mm_struct *mm,
> void *maddr;
> struct page *page = NULL;
>
> - ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags,
> + ret = get_user_pages_remote(mm, addr, 1, gup_flags,
> &page, &vma, NULL);
> if (ret <= 0)
> break;
>
> Seems to be a new caller merged recently, so it got left behind during the
> rebases... Sorry for not noticing that.
The mte code is only in -next but since it's based on 5.8-rc3, we can't
change it without breaking it.
Is there a stable branch somewhere with the gup patches? If not, I can
provisionally drop the affected MTE patches from -next and push them
upstream closer to the -rc1 (it's the ptrace support from MTE).
--
Catalin
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Build failure in -next with get_user_pages_remote() API change
2020-07-10 15:23 ` Catalin Marinas
@ 2020-07-10 22:28 ` Andrew Morton
2020-07-23 18:10 ` Catalin Marinas
0 siblings, 1 reply; 6+ messages in thread
From: Andrew Morton @ 2020-07-10 22:28 UTC (permalink / raw)
To: Catalin Marinas
Cc: John Hubbard, Mark Brown, Peter Xu, Steven Price, linux-next,
Will Deacon, linux-arm-kernel
On Fri, 10 Jul 2020 16:23:58 +0100 Catalin Marinas <catalin.marinas@arm.com> wrote:
> > --- a/arch/arm64/kernel/mte.c
> > +++ b/arch/arm64/kernel/mte.c
> > @@ -221,7 +221,7 @@ static int __access_remote_tags(struct task_struct *tsk, struct mm_struct *mm,
> > void *maddr;
> > struct page *page = NULL;
> >
> > - ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags,
> > + ret = get_user_pages_remote(mm, addr, 1, gup_flags,
> > &page, &vma, NULL);
> > if (ret <= 0)
> > break;
> >
> > Seems to be a new caller merged recently, so it got left behind during the
> > rebases... Sorry for not noticing that.
>
> The mte code is only in -next but since it's based on 5.8-rc3, we can't
> change it without breaking it.
>
> Is there a stable branch somewhere with the gup patches? If not, I can
> provisionally drop the affected MTE patches from -next and push them
> upstream closer to the -rc1 (it's the ptrace support from MTE).
Is OK. I restaged this patch series to come after linux-next's
material and added Peter's fixup. I'll merge this series into Linus
after the ARM tree has merged so everything will land nicely.
Happens often ;)
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Build failure in -next with get_user_pages_remote() API change
2020-07-10 22:28 ` Andrew Morton
@ 2020-07-23 18:10 ` Catalin Marinas
0 siblings, 0 replies; 6+ messages in thread
From: Catalin Marinas @ 2020-07-23 18:10 UTC (permalink / raw)
To: Andrew Morton
Cc: John Hubbard, Mark Brown, Peter Xu, Steven Price, linux-next,
Will Deacon, linux-arm-kernel
On Fri, Jul 10, 2020 at 03:28:58PM -0700, Andrew Morton wrote:
> On Fri, 10 Jul 2020 16:23:58 +0100 Catalin Marinas <catalin.marinas@arm.com> wrote:
> > > --- a/arch/arm64/kernel/mte.c
> > > +++ b/arch/arm64/kernel/mte.c
> > > @@ -221,7 +221,7 @@ static int __access_remote_tags(struct task_struct *tsk, struct mm_struct *mm,
> > > void *maddr;
> > > struct page *page = NULL;
> > >
> > > - ret = get_user_pages_remote(tsk, mm, addr, 1, gup_flags,
> > > + ret = get_user_pages_remote(mm, addr, 1, gup_flags,
> > > &page, &vma, NULL);
> > > if (ret <= 0)
> > > break;
> > >
> > > Seems to be a new caller merged recently, so it got left behind during the
> > > rebases... Sorry for not noticing that.
> >
> > The mte code is only in -next but since it's based on 5.8-rc3, we can't
> > change it without breaking it.
> >
> > Is there a stable branch somewhere with the gup patches? If not, I can
> > provisionally drop the affected MTE patches from -next and push them
> > upstream closer to the -rc1 (it's the ptrace support from MTE).
>
> Is OK. I restaged this patch series to come after linux-next's
> material and added Peter's fixup. I'll merge this series into Linus
> after the ARM tree has merged so everything will land nicely.
Just a heads-up that I'll drop the arm64 MTE series from -next,
postponing the merging until 5.10 (there is an ongoing discussion on the
prctl() aspect and I don't want to be forced to change the user ABI
after upstreaming). You'll get another conflict for Peter's hunk above.
Thanks.
--
Catalin
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2020-07-10 11:32 Build failure in -next with get_user_pages_remote() API change Mark Brown
2020-07-10 12:24 ` Peter Xu
2020-07-10 13:38 ` Peter Xu
2020-07-10 15:23 ` Catalin Marinas
2020-07-10 22:28 ` Andrew Morton
2020-07-23 18:10 ` Catalin Marinas
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