Hi Philip,

On Sat, Dec 18, 2021 at 08:30:24PM +0800, Philip Li wrote:
> On Fri, Dec 17, 2021 at 01:47:08PM -0500, Andrea Arcangeli wrote:
> > Hello,
> > 
> > I'm not receiving mails from lkp anymore on my kernel tree for a
> > while:
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git
> > 
> > Mostly my interest is in the "main" branch, the other branches aren't
> > as important to test.
> > 
> > If you disconnected the kernel test robot from my tree it'd be good to
> > know, alternatively if it's just an glitch if you could correct it, it
> > would be great.
> 
> Sorry Andrea about this, we will check internally to see what went wrong.
> We will not disconnect any repo, and this should be some bug.

This is great news. Thanks a lot for checking!

I shall specify that it might be possible that it's still running,
perhaps I simply triggered no emails over the last months despite
adding various updates, but I thought of asking just in case.

Thanks,
Andrea

> 
> Hi Yujie, can you help to check and resolve this?
> 
> Thanks
> 
> > 
> > Thank you,
> > Andrea
> > 
> > On Tue, May 11, 2021 at 06:45:36PM +0800, kernel test robot wrote:
> > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git mapcount_deshare
> > > head:   3e2f198cce0c1792ad71d6d81974b091019b6483
> > > commit: 8dec302e87453234fc7ac1cf4d09e4d577a06cf3 [20/27] mm: gup: pack has_pinned in MMF_HAS_PINNED
> > > config: arm-randconfig-r014-20210511 (attached as .config)
> > > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a0fed635fe1701470062495a6ffee1c608f3f1bc)
> > > reproduce (this is a W=1 build):
> > >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > >         chmod +x ~/bin/make.cross
> > >         # install arm cross compiling tool for clang build
> > >         # apt-get install binutils-arm-linux-gnueabi
> > >         # https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git/commit/?id=8dec302e87453234fc7ac1cf4d09e4d577a06cf3
> > >         git remote add aa https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git
> > >         git fetch --no-tags aa mapcount_deshare
> > >         git checkout 8dec302e87453234fc7ac1cf4d09e4d577a06cf3
> > >         # save the attached .config to linux build tree
> > >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm 
> > > 
> > > If you fix the issue, kindly add following tag as appropriate
> > > Reported-by: kernel test robot <lkp@intel.com>
> > > 
> > > All errors (new ones prefixed by >>):
> > > 
> > > >> mm/gup.c:2756:3: error: implicit declaration of function 'mm_set_has_pinned_flag' [-Werror,-Wimplicit-function-declaration]
> > >                    mm_set_has_pinned_flag(&current->mm->flags);
> > >                    ^
> > >    1 error generated.
> > > 
> > > 
> > > vim +/mm_set_has_pinned_flag +2756 mm/gup.c
> > > 
> > >   2740	
> > >   2741	static int internal_get_user_pages_fast(unsigned long start,
> > >   2742						unsigned long nr_pages,
> > >   2743						unsigned int gup_flags,
> > >   2744						struct page **pages)
> > >   2745	{
> > >   2746		unsigned long len, end;
> > >   2747		unsigned long nr_pinned;
> > >   2748		int ret;
> > >   2749	
> > >   2750		if (WARN_ON_ONCE(gup_flags & ~(FOLL_WRITE | FOLL_LONGTERM |
> > >   2751					       FOLL_FORCE | FOLL_PIN | FOLL_GET |
> > >   2752					       FOLL_FAST_ONLY)))
> > >   2753			return -EINVAL;
> > >   2754	
> > >   2755		if (gup_flags & FOLL_PIN)
> > > > 2756			mm_set_has_pinned_flag(&current->mm->flags);
> > >   2757	
> > >   2758		if (!(gup_flags & FOLL_FAST_ONLY))
> > >   2759			might_lock_read(&current->mm->mmap_lock);
> > >   2760	
> > >   2761		start = untagged_addr(start) & PAGE_MASK;
> > >   2762		len = nr_pages << PAGE_SHIFT;
> > >   2763		if (check_add_overflow(start, len, &end))
> > >   2764			return 0;
> > >   2765		if (unlikely(!access_ok((void __user *)start, len)))
> > >   2766			return -EFAULT;
> > >   2767	
> > >   2768		nr_pinned = lockless_pages_from_mm(start, end, gup_flags, pages);
> > >   2769		if (nr_pinned == nr_pages || gup_flags & FOLL_FAST_ONLY)
> > >   2770			return nr_pinned;
> > >   2771	
> > >   2772		/* Slow path: try to get the remaining pages with get_user_pages */
> > >   2773		start += nr_pinned << PAGE_SHIFT;
> > >   2774		pages += nr_pinned;
> > >   2775		ret = __gup_longterm_unlocked(start, nr_pages - nr_pinned, gup_flags,
> > >   2776					      pages);
> > >   2777		if (ret < 0) {
> > >   2778			/*
> > >   2779			 * The caller has to unpin the pages we already pinned so
> > >   2780			 * returning -errno is not an option
> > >   2781			 */
> > >   2782			if (nr_pinned)
> > >   2783				return nr_pinned;
> > >   2784			return ret;
> > >   2785		}
> > >   2786		return ret + nr_pinned;
> > >   2787	}
> > >   2788	
> > > 
> > > ---
> > > 0-DAY CI Kernel Test Service, Intel Corporation
> > > https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
> > 
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