* [akpm-mm:mm-stable 72/140] arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'?
@ 2026-03-25 3:10 kernel test robot
2026-03-25 3:27 ` Andrew Morton
0 siblings, 1 reply; 5+ messages in thread
From: kernel test robot @ 2026-03-25 3:10 UTC (permalink / raw)
To: Chengkaitao
Cc: oe-kbuild-all, David Hildenbrand, Andrew Morton,
Linux Memory Management List
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-stable
head: e393ce79b3cf63c2810be882eb6e531a54f520f4
commit: e504282091c8e4dc4f945c89d9b44ac2e0bfe504 [72/140] mm: convert vmemmap_p?d_populate() to static functions
config: sparc-randconfig-001-20260325 (https://download.01.org/0day-ci/archive/20260325/202603251147.CtgepAeH-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/202603251147.CtgepAeH-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/202603251147.CtgepAeH-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
arch/sparc/mm/init_64.c: In function 'sun4v_linear_pte_xor_finalize':
arch/sparc/mm/init_64.c:2202:16: warning: variable 'pagecv_flag' set but not used [-Wunused-but-set-variable]
unsigned long pagecv_flag;
^~~~~~~~~~~
arch/sparc/mm/init_64.c: In function 'vmemmap_populate':
>> arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'? [-Werror=implicit-function-declaration]
pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
^~~~~~~~~~~~~~~~~~~~
vmemmap_populate
>> arch/sparc/mm/init_64.c:2582:16: warning: initialization of 'pgd_t *' {aka 'struct <anonymous> *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
>> arch/sparc/mm/init_64.c:2591:9: error: implicit declaration of function 'vmemmap_p4d_populate'; did you mean 'vmemmap_populate'? [-Werror=implicit-function-declaration]
p4d = vmemmap_p4d_populate(pgd, vstart, node);
^~~~~~~~~~~~~~~~~~~~
vmemmap_populate
>> arch/sparc/mm/init_64.c:2591:7: warning: assignment to 'p4d_t *' {aka 'struct <anonymous> *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
p4d = vmemmap_p4d_populate(pgd, vstart, node);
^
>> arch/sparc/mm/init_64.c:2595:9: error: implicit declaration of function 'vmemmap_pud_populate'; did you mean 'vmemmap_populate'? [-Werror=implicit-function-declaration]
pud = vmemmap_pud_populate(p4d, vstart, node);
^~~~~~~~~~~~~~~~~~~~
vmemmap_populate
>> arch/sparc/mm/init_64.c:2595:7: warning: assignment to 'pud_t *' {aka 'struct <anonymous> *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
pud = vmemmap_pud_populate(p4d, vstart, node);
^
cc1: some warnings being treated as errors
vim +2582 arch/sparc/mm/init_64.c
c4bce90ea2069e arch/sparc64/mm/init.c David S. Miller 2006-02-11 2563
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2564 #ifdef CONFIG_SPARSEMEM_VMEMMAP
0aad818b2de455 arch/sparc/mm/init_64.c Johannes Weiner 2013-04-29 2565 int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend,
7b73d978a5d0d2 arch/sparc/mm/init_64.c Christoph Hellwig 2017-12-29 2566 int node, struct vmem_altmap *altmap)
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2567 {
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2568 unsigned long pte_base;
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2569
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2570 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U |
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2571 _PAGE_CP_4U | _PAGE_CV_4U |
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2572 _PAGE_P_4U | _PAGE_W_4U);
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2573 if (tlb_type == hypervisor)
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2574 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V |
494e5b6faeda1d arch/sparc/mm/init_64.c Khalid Aziz 2015-05-27 2575 page_cache4v_flag | _PAGE_P_4V | _PAGE_W_4V);
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2576
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2577 pte_base |= _PAGE_PMD_HUGE;
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2578
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2579 vstart = vstart & PMD_MASK;
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2580 vend = ALIGN(vend, PMD_SIZE);
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2581 for (; vstart < vend; vstart += PMD_SIZE) {
df8ee578894ebb arch/sparc/mm/init_64.c Pavel Tatashin 2017-11-15 @2582 pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2583 unsigned long pte;
5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2584 p4d_t *p4d;
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2585 pud_t *pud;
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2586 pmd_t *pmd;
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2587
df8ee578894ebb arch/sparc/mm/init_64.c Pavel Tatashin 2017-11-15 2588 if (!pgd)
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2589 return -ENOMEM;
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2590
5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 @2591 p4d = vmemmap_p4d_populate(pgd, vstart, node);
5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2592 if (!p4d)
5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2593 return -ENOMEM;
5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2594
5637bc50483404 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 @2595 pud = vmemmap_pud_populate(p4d, vstart, node);
df8ee578894ebb arch/sparc/mm/init_64.c Pavel Tatashin 2017-11-15 2596 if (!pud)
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2597 return -ENOMEM;
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2598
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2599 pmd = pmd_offset(pud, vstart);
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2600 pte = pmd_val(*pmd);
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2601 if (!(pte & _PAGE_VALID)) {
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2602 void *block = vmemmap_alloc_block(PMD_SIZE, node);
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2603
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2604 if (!block)
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2605 return -ENOMEM;
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2606
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2607 pmd_val(*pmd) = pte_base | __pa(block);
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2608 }
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2609 }
2856cc2e4d0852 arch/sparc/mm/init_64.c David S. Miller 2012-08-15 2610
c06240c7f5c39c arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2611 return 0;
2856cc2e4d0852 arch/sparc/mm/init_64.c David S. Miller 2012-08-15 2612 }
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2613 #endif /* CONFIG_SPARSEMEM_VMEMMAP */
46644c2477c589 arch/sparc64/mm/init.c David Miller 2007-10-16 2614
:::::: The code at line 2582 was first introduced by commit
:::::: df8ee578894ebb591c2995cce422e6189c8bb757 sparc64: simplify vmemmap_populate
:::::: TO: Pavel Tatashin <pasha.tatashin@oracle.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [akpm-mm:mm-stable 72/140] arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'?
2026-03-25 3:10 [akpm-mm:mm-stable 72/140] arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'? kernel test robot
@ 2026-03-25 3:27 ` Andrew Morton
2026-03-25 3:57 ` Philip Li
0 siblings, 1 reply; 5+ messages in thread
From: Andrew Morton @ 2026-03-25 3:27 UTC (permalink / raw)
To: kernel test robot
Cc: Chengkaitao, oe-kbuild-all, David Hildenbrand,
Linux Memory Management List
On Wed, 25 Mar 2026 11:10:49 +0800 kernel test robot <lkp@intel.com> wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-stable
> head: e393ce79b3cf63c2810be882eb6e531a54f520f4
> commit: e504282091c8e4dc4f945c89d9b44ac2e0bfe504 [72/140] mm: convert vmemmap_p?d_populate() to static functions
> config: sparc-randconfig-001-20260325 (https://download.01.org/0day-ci/archive/20260325/202603251147.CtgepAeH-lkp@intel.com/config)
> compiler: sparc64-linux-gcc (GCC) 8.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/202603251147.CtgepAeH-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/202603251147.CtgepAeH-lkp@intel.com/
>
> All error/warnings (new ones prefixed by >>):
>
> arch/sparc/mm/init_64.c: In function 'sun4v_linear_pte_xor_finalize':
> arch/sparc/mm/init_64.c:2202:16: warning: variable 'pagecv_flag' set but not used [-Wunused-but-set-variable]
> unsigned long pagecv_flag;
> ^~~~~~~~~~~
> arch/sparc/mm/init_64.c: In function 'vmemmap_populate':
> >> arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'? [-Werror=implicit-function-declaration]
> pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
> ^~~~~~~~~~~~~~~~~~~~
Oh fecal matter. Seven weeks in mm.git and then seven milliseconds
after I move it into mm-stable, we get this.
The coincidence is too great. I assume Kernel Test Robot is somehow
treating the mm-stable differently from other branches? Can we please
not do that?
Thanks, I dropped the patch. Chengkaitao, please redo and resend after
7.1-rc1.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [akpm-mm:mm-stable 72/140] arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'?
2026-03-25 3:27 ` Andrew Morton
@ 2026-03-25 3:57 ` Philip Li
2026-03-25 4:26 ` Andrew Morton
0 siblings, 1 reply; 5+ messages in thread
From: Philip Li @ 2026-03-25 3:57 UTC (permalink / raw)
To: Andrew Morton
Cc: kernel test robot, Chengkaitao, oe-kbuild-all, David Hildenbrand,
Linux Memory Management List
On Tue, Mar 24, 2026 at 08:27:54PM -0700, Andrew Morton wrote:
> On Wed, 25 Mar 2026 11:10:49 +0800 kernel test robot <lkp@intel.com> wrote:
>
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-stable
> > head: e393ce79b3cf63c2810be882eb6e531a54f520f4
> > commit: e504282091c8e4dc4f945c89d9b44ac2e0bfe504 [72/140] mm: convert vmemmap_p?d_populate() to static functions
> > config: sparc-randconfig-001-20260325 (https://download.01.org/0day-ci/archive/20260325/202603251147.CtgepAeH-lkp@intel.com/config)
> > compiler: sparc64-linux-gcc (GCC) 8.5.0
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/202603251147.CtgepAeH-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/202603251147.CtgepAeH-lkp@intel.com/
> >
> > All error/warnings (new ones prefixed by >>):
> >
> > arch/sparc/mm/init_64.c: In function 'sun4v_linear_pte_xor_finalize':
> > arch/sparc/mm/init_64.c:2202:16: warning: variable 'pagecv_flag' set but not used [-Wunused-but-set-variable]
> > unsigned long pagecv_flag;
> > ^~~~~~~~~~~
> > arch/sparc/mm/init_64.c: In function 'vmemmap_populate':
> > >> arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'? [-Werror=implicit-function-declaration]
> > pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
> > ^~~~~~~~~~~~~~~~~~~~
>
> Oh fecal matter. Seven weeks in mm.git and then seven milliseconds
> after I move it into mm-stable, we get this.
>
> The coincidence is too great. I assume Kernel Test Robot is somehow
> treating the mm-stable differently from other branches? Can we please
> not do that?
Sorry for this "coincidence", the bot does treat all branches equally and
there's no special handling of mm-stable. One possibility is the randconfig
is just generated on 20260325 "sparc-randconfig-001-20260325", which is able
to expose this issue for sparc arch.
>
> Thanks, I dropped the patch. Chengkaitao, please redo and resend after
> 7.1-rc1.
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [akpm-mm:mm-stable 72/140] arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'?
2026-03-25 3:57 ` Philip Li
@ 2026-03-25 4:26 ` Andrew Morton
2026-03-25 5:04 ` Philip Li
0 siblings, 1 reply; 5+ messages in thread
From: Andrew Morton @ 2026-03-25 4:26 UTC (permalink / raw)
To: Philip Li
Cc: kernel test robot, Chengkaitao, oe-kbuild-all, David Hildenbrand,
Linux Memory Management List
On Wed, 25 Mar 2026 11:57:27 +0800 Philip Li <philip.li@intel.com> wrote:
> > The coincidence is too great. I assume Kernel Test Robot is somehow
> > treating the mm-stable differently from other branches? Can we please
> > not do that?
>
> Sorry for this "coincidence", the bot does treat all branches equally and
> there's no special handling of mm-stable. One possibility is the randconfig
> is just generated on 20260325 "sparc-randconfig-001-20260325", which is able
> to expose this issue for sparc arch.
huh, OK, thanks. I was able to reproduce it with sparc64 defconfig.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [akpm-mm:mm-stable 72/140] arch/sparc/mm/init_64.c:2582:16: error: implicit declaration of function 'vmemmap_pgd_populate'; did you mean 'vmemmap_populate'?
2026-03-25 4:26 ` Andrew Morton
@ 2026-03-25 5:04 ` Philip Li
0 siblings, 0 replies; 5+ messages in thread
From: Philip Li @ 2026-03-25 5:04 UTC (permalink / raw)
To: Andrew Morton
Cc: kernel test robot, Chengkaitao, oe-kbuild-all, David Hildenbrand,
Linux Memory Management List
On Tue, Mar 24, 2026 at 09:26:58PM -0700, Andrew Morton wrote:
> On Wed, 25 Mar 2026 11:57:27 +0800 Philip Li <philip.li@intel.com> wrote:
>
> > > The coincidence is too great. I assume Kernel Test Robot is somehow
> > > treating the mm-stable differently from other branches? Can we please
> > > not do that?
> >
> > Sorry for this "coincidence", the bot does treat all branches equally and
> > there's no special handling of mm-stable. One possibility is the randconfig
> > is just generated on 20260325 "sparc-randconfig-001-20260325", which is able
> > to expose this issue for sparc arch.
>
> huh, OK, thanks. I was able to reproduce it with sparc64 defconfig.
Apologize for my conclusion, i did a check of internal data when replies mail at
that time and only find the errors of randconfig. Since sparc64-defconfig is recorded
as done but not shown in the error record, I made the wrong conclusion that this is
exposed by randconfig. The truth is sparc64-defconfig does cause build failure.
recent_errors/
└── sparc-randconfig-001-20260325
├── arch-sparc-mm-init_64.c:error:implicit-declaration-of-function-vmemmap_p4d_populate
├── arch-sparc-mm-init_64.c:error:implicit-declaration-of-function-vmemmap_pgd_populate
├── arch-sparc-mm-init_64.c:error:implicit-declaration-of-function-vmemmap_pud_populate
├── arch-sparc-mm-init_64.c:warning:assignment-to-p4d_t-aka-struct-anonymous-from-int-makes-pointer-from-integer-without-a-cast
├── arch-sparc-mm-init_64.c:warning:assignment-to-pud_t-aka-struct-anonymous-from-int-makes-pointer-from-integer-without-a-cast
└── arch-sparc-mm-init_64.c:warning:initialization-of-pgd_t-aka-struct-anonymous-from-int-makes-pointer-from-integer-without-a-cast
I will do more investigation to understand why bot doesn't report issue out during the
7 weeks window, and fix the bug. Sorry again about this miss.
Thanks
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
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2026-03-25 3:27 ` Andrew Morton
2026-03-25 3:57 ` Philip Li
2026-03-25 4:26 ` Andrew Morton
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