linux-kernel - Re: [PATCH 4.4 00/88] 4.4.168-stable review

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Date:   Mon, 17 Dec 2018 10:05:33 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Ben Hutchings <ben.hutchings@...ethink.co.uk>
Cc:     Guenter Roeck <linux@...ck-us.net>, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
        shuah@...nel.org, patches@...nelci.org,
        lkft-triage@...ts.linaro.org, stable@...r.kernel.org
Subject: Re: [PATCH 4.4 00/88] 4.4.168-stable review

On Sun, Dec 16, 2018 at 11:58:13PM +0000, Ben Hutchings wrote:
> On Sat, 2018-12-15 at 07:45 -0800, Guenter Roeck wrote:
> > On 12/15/18 12:07 AM, Greg Kroah-Hartman wrote:
> > > On Fri, Dec 14, 2018 at 06:10:29PM -0800, Guenter Roeck wrote:
> > > > On 12/14/18 3:59 AM, Greg Kroah-Hartman wrote:
> > > > > This is the start of the stable review cycle for the 4.4.168 release.
> > > > > There are 88 patches in this series, all will be posted as a response
> > > > > to this one.  If anyone has any issues with these being applied, please
> > > > > let me know.
> > > > > 
> > > > > Responses should be made by Sun Dec 16 11:56:41 UTC 2018.
> > > > > Anything received after that time might be too late.
> > > > 
> > > > Build results:
> > > > 	total: 170 pass: 145 fail: 25
> > > > Failed builds:
> > > > 	arm:allnoconfig
> > > > 	arm:tinyconfig
> > > > 	arm:efm32_defconfig
> > > > 	blackfin:defconfig
> > > > 	blackfin:BF561-EZKIT-SMP_defconfig
> > > > 	c6x:dsk6455_defconfig
> > > > 	c6x:evmc6457_defconfig
> > > > 	c6x:evmc6678_defconfig
> > > > 	h8300:allnoconfig
> > > > 	h8300:tinyconfig
> > > > 	h8300:edosk2674_defconfig
> > > > 	h8300:h8300h-sim_defconfig
> > > > 	h8300:h8s-sim_defconfig
> > > > 	m68k:allnoconfig
> > > > 	m68k:tinyconfig
> > > > 	m68k:m5272c3_defconfig
> > > > 	m68k:m5307c3_defconfig
> > > > 	m68k:m5249evb_defconfig
> > > > 	m68k:m5407c3_defconfig
> > > > 	microblaze:nommu_defconfig
> > > > 	microblaze:allnoconfig
> > > > 	microblaze:tinyconfig
> > > > 	sh:defconfig
> > > > 	sh:allnoconfig
> > > > 	sh:tinyconfig
> > > > Qemu test results:
> > > > 	total: 288 pass: 288 fail: 0
> > > > 
> > > > mm/nommu.c: In function '__get_user_pages_unlocked':
> > > > mm/nommu.c:211:49: error: 'write' undeclared (first use in this function)
> > > > mm/nommu.c:211:56: error: 'force' undeclared (first use in this function)
> > > > mm/nommu.c:212:9: warning: passing argument 7 of 'get_user_pages' from incompatible pointer type [enabled by default]
> > > > mm/nommu.c:185:6: note: expected 'struct vm_area_struct **' but argument is of type 'struct page **'
> > > > mm/nommu.c:212:9: error: too many arguments to function 'get_user_pages'
> > > > mm/nommu.c:185:6: note: declared here
> > > > 
> > > > Details are available at https://kerneltests.org/builders/.
> > > 
> > > Ugh, I'll dig through this later on today, we must be missing something
> > > with those backports that Ben did...
> > > 
> > 
> > 69ce144e5c3a ("mm: replace get_user_pages() write/force parameters
> > with gup_flags") seems to have missed converting a call of
> > get_user_pages().
> 
> Right.  This was changed earlier upstream in commit cde70140fed8
> "mm/gup: Overload get_user_pages() functions", but I don't think it
> makes sense to apply all of that.  I'm attaching a minimal patch
> (tested with an arm allnoconfig build) which should ideally be inserted
> before mm-replace-get_user_pages-write-force-parameters-with-
> gup_flags.patch.
> 
> Ben.
> 
> -- 
> Ben Hutchings, Software Developer                         Codethink Ltd
> https://www.codethink.co.uk/                 Dale House, 35 Dale Street
>                                      Manchester, M1 2HF, United Kingdom

> From 0d0afe933f60f5736c984e9171214aa34b18764c Mon Sep 17 00:00:00 2001
> From: Ben Hutchings <ben.hutchings@...ethink.co.uk>
> Date: Sun, 16 Dec 2018 23:50:08 +0000
> Subject: [PATCH] mm/nommu.c: Switch __get_user_pages_unlocked() to use
>  __get_user_pages()
> 
> Extracted from commit cde70140fed8 "mm/gup: Overload get_user_pages()
> functions".  This is needed before picking commit 768ae309a961
> "mm: replace get_user_pages() write/force parameters with gup_flags".
> 
> Signed-off-by: Ben Hutchings <ben.hutchings@...ethink.co.uk>
> ---
>  mm/nommu.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/mm/nommu.c b/mm/nommu.c
> index fa1560c218d5..2360546db065 100644
> --- a/mm/nommu.c
> +++ b/mm/nommu.c
> @@ -208,8 +208,8 @@ long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,
>  {
>  	long ret;
>  	down_read(&mm->mmap_sem);
> -	ret = get_user_pages(tsk, mm, start, nr_pages, write, force,
> -			     pages, NULL);
> +	ret = __get_user_pages(tsk, mm, start, nr_pages, gup_flags, pages,
> +			       NULL, NULL);
>  	up_read(&mm->mmap_sem);
>  	return ret;
>  }

Thanks for the patch.  I've added it to the queue and pushed out a -rc2
with this in it.

Let's see what the builders say :)

greg k-h