Re: [sj:damon/next 34/101] mm/mprotect.c:726:13: error: 'PAGE_NONE' undeclared; did you mean 'PAGE_U_NONE'?

[SeongJae Park <sj@kernel.org>]

On Sun, 27 Jul 2025 10:45:44 -0700 SeongJae Park <sj@kernel.org> wrote:

> On Sun, 27 Jul 2025 08:16:01 +0800 kernel test robot <lkp@intel.com> wrote:
> 
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sj/linux.git damon/next
> > head:   de1df744d5c68470ace629863436a2b0b7360254
> > commit: af1d8aa70d3ae773ee9c7b9782ccfef1876bb027 [34/101] mm/mprotect: use PAGE_NONE for change_protection(..., MM_CP_PROT_DAMON)
> > config: arc-randconfig-001-20250727 (https://download.01.org/0day-ci/archive/20250727/202507270855.YvsYlfrv-lkp@intel.com/config)
> > compiler: arc-linux-gcc (GCC) 8.5.0
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250727/202507270855.YvsYlfrv-lkp@intel.com/reproduce)
> > 
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202507270855.YvsYlfrv-lkp@intel.com/
> > 
> > All errors (new ones prefixed by >>):
> > 
> >    In file included from include/linux/pagewalk.h:5,
> >                     from mm/mprotect.c:12:
> >    include/linux/mm.h:78: warning: "PAGES_TO_MB" redefined
> >     #define PAGES_TO_MB(pages) ((pages) >> (20 - PAGE_SHIFT))
> >     
> >    In file included from arch/arc/include/asm/irqflags-compact.h:16,
> >                     from arch/arc/include/asm/irqflags.h:11,
> >                     from include/linux/irqflags.h:18,
> >                     from include/linux/spinlock.h:59,
> >                     from include/linux/mmzone.h:8,
> >                     from include/linux/gfp.h:7,
> >                     from include/linux/mm.h:7,
> >                     from include/linux/pagewalk.h:5,
> >                     from mm/mprotect.c:12:
> >    arch/arc/include/asm/arcregs.h:155: note: this is the location of the previous definition
> >     #define PAGES_TO_MB(n_pages) (PAGES_TO_KB(n_pages) >> 10)
> >     
> >    mm/mprotect.c: In function 'change_protection':
> > >> mm/mprotect.c:726:13: error: 'PAGE_NONE' undeclared (first use in this function); did you mean 'PAGE_U_NONE'?
> >       newprot = PAGE_NONE;
> >                 ^~~~~~~~~
> >                 PAGE_U_NONE
> >    mm/mprotect.c:726:13: note: each undeclared identifier is reported only once for each function it appears in
> 
> Thank you for this report!  I just pushed a fix:
> https://git.kernel.org/pub/scm/linux/kernel/git/sj/linux.git/commit/?h=damon/next&id=bbc588c9166d6ff4ac9b270929732760215a94c3

There was a silly typo, sorry.  Pushed another fix for that:
https://git.kernel.org/pub/scm/linux/kernel/git/sj/linux.git/commit/?h=damon/next&id=7e65eab68ae7ff67bcaaa0466278aab7ec966604


Thanks,
SJ

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