* [akpm-mm:mm-new 358/388] mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'?
@ 2026-09-10 14:31 kernel test robot
2026-09-10 15:16 ` Suren Baghdasaryan
0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2026-09-10 14:31 UTC (permalink / raw)
To: Andrew Morton
Cc: oe-kbuild-all, David Hildenbrand, Linux Memory Management List,
mm-commits, Muchun Song
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
head: cf558a250cf4475a8936902b8978fbb6c61016f8
commit: dd35ca2f2cac9d6439a2ba2f523b98b5a9a9f8f5 [358/388] mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages-fix
config: s390-randconfig-r121-20260910 (https://download.01.org/0day-ci/archive/20260910/202609102250.lIycVv3n-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 13.4.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260910/202609102250.lIycVv3n-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/202609102250.lIycVv3n-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
mm/sparse-vmemmap.c: In function 'vmemmap_populate_compound_pages':
>> mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'? [-Werror=implicit-function-declaration]
507 | page = vmemmap_shared_tail_page(order, device_zone(node));
| ^~~~~~~~~~~
| device_move
>> mm/sparse-vmemmap.c:507:48: warning: passing argument 2 of 'vmemmap_shared_tail_page' makes pointer from integer without a cast [-Wint-conversion]
507 | page = vmemmap_shared_tail_page(order, device_zone(node));
| ^~~~~~~~~~~~~~~~~
| |
| int
mm/sparse-vmemmap.c:172:78: note: expected 'struct zone *' but argument is of type 'int'
172 | struct page __ref *vmemmap_shared_tail_page(unsigned int order, struct zone *zone)
| ~~~~~~~~~~~~~^~~~
cc1: some warnings being treated as errors
vim +507 mm/sparse-vmemmap.c
4917f55b4ef963 Joao Martins 2022-04-28 494
4917f55b4ef963 Joao Martins 2022-04-28 495 static int __meminit vmemmap_populate_compound_pages(unsigned long start_pfn,
4917f55b4ef963 Joao Martins 2022-04-28 496 unsigned long start,
4917f55b4ef963 Joao Martins 2022-04-28 497 unsigned long end, int node,
4917f55b4ef963 Joao Martins 2022-04-28 498 struct dev_pagemap *pgmap)
4917f55b4ef963 Joao Martins 2022-04-28 499 {
4917f55b4ef963 Joao Martins 2022-04-28 500 unsigned long size, addr;
4917f55b4ef963 Joao Martins 2022-04-28 501 pte_t *pte;
4917f55b4ef963 Joao Martins 2022-04-28 502 int rc;
d1d11861d8a018 Muchun Song 2026-09-08 503 unsigned long flags = VMEMMAP_POPULATE_DAX;
8fbaacc4a64bd1 Muchun Song 2026-09-08 504 struct page *page;
8fbaacc4a64bd1 Muchun Song 2026-09-08 505 unsigned int order = pfn_to_section_order(start_pfn);
4917f55b4ef963 Joao Martins 2022-04-28 506
8fbaacc4a64bd1 Muchun Song 2026-09-08 @507 page = vmemmap_shared_tail_page(order, device_zone(node));
8fbaacc4a64bd1 Muchun Song 2026-09-08 508 if (!page)
4917f55b4ef963 Joao Martins 2022-04-28 509 return -ENOMEM;
4917f55b4ef963 Joao Martins 2022-04-28 510
8fbaacc4a64bd1 Muchun Song 2026-09-08 511 if (reuse_compound_section(start_pfn, pgmap))
4917f55b4ef963 Joao Martins 2022-04-28 512 return vmemmap_populate_range(start, end, node, NULL,
8fbaacc4a64bd1 Muchun Song 2026-09-08 513 page_to_pfn(page), flags);
4917f55b4ef963 Joao Martins 2022-04-28 514
8fbaacc4a64bd1 Muchun Song 2026-09-08 515 size = min(end - start, (1UL << order) * sizeof(struct page));
4917f55b4ef963 Joao Martins 2022-04-28 516 for (addr = start; addr < end; addr += size) {
55896f935a60b9 Gautam Menghani 2022-06-12 517 unsigned long next, last = addr + size;
4917f55b4ef963 Joao Martins 2022-04-28 518
4917f55b4ef963 Joao Martins 2022-04-28 519 /* Populate the head page vmemmap page */
d1d11861d8a018 Muchun Song 2026-09-08 520 pte = vmemmap_populate_address(addr, node, NULL, -1, flags);
4917f55b4ef963 Joao Martins 2022-04-28 521 if (!pte)
4917f55b4ef963 Joao Martins 2022-04-28 522 return -ENOMEM;
4917f55b4ef963 Joao Martins 2022-04-28 523
4917f55b4ef963 Joao Martins 2022-04-28 524 /* Populate the tail pages vmemmap page */
4917f55b4ef963 Joao Martins 2022-04-28 525 next = addr + PAGE_SIZE;
d1d11861d8a018 Muchun Song 2026-09-08 526 pte = vmemmap_populate_address(next, node, NULL, -1, flags);
4917f55b4ef963 Joao Martins 2022-04-28 527 if (!pte)
4917f55b4ef963 Joao Martins 2022-04-28 528 return -ENOMEM;
4917f55b4ef963 Joao Martins 2022-04-28 529
4917f55b4ef963 Joao Martins 2022-04-28 530 /*
8fbaacc4a64bd1 Muchun Song 2026-09-08 531 * Reuse the shared page for the rest of tail pages
ee65728e103bb7 Mike Rapoport 2022-06-27 532 * See layout diagram in Documentation/mm/vmemmap_dedup.rst
4917f55b4ef963 Joao Martins 2022-04-28 533 */
4917f55b4ef963 Joao Martins 2022-04-28 534 next += PAGE_SIZE;
4917f55b4ef963 Joao Martins 2022-04-28 535 rc = vmemmap_populate_range(next, last, node, NULL,
8fbaacc4a64bd1 Muchun Song 2026-09-08 536 page_to_pfn(page), flags);
4917f55b4ef963 Joao Martins 2022-04-28 537 if (rc)
4917f55b4ef963 Joao Martins 2022-04-28 538 return -ENOMEM;
4917f55b4ef963 Joao Martins 2022-04-28 539 }
4917f55b4ef963 Joao Martins 2022-04-28 540
4917f55b4ef963 Joao Martins 2022-04-28 541 return 0;
2beea70a3edc03 Joao Martins 2022-04-28 542 }
2beea70a3edc03 Joao Martins 2022-04-28 543
:::::: The code at line 507 was first introduced by commit
:::::: 8fbaacc4a64bd1bfbfb11bfb48b5db3f4943cbd7 mm/sparse-vmemmap: switch device DAX to shared tail vmemmap pages
:::::: TO: Muchun Song <songmuchun@bytedance.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [akpm-mm:mm-new 358/388] mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'?
2026-09-10 14:31 [akpm-mm:mm-new 358/388] mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'? kernel test robot
@ 2026-09-10 15:16 ` Suren Baghdasaryan
2026-09-10 15:22 ` Suren Baghdasaryan
0 siblings, 1 reply; 3+ messages in thread
From: Suren Baghdasaryan @ 2026-09-10 15:16 UTC (permalink / raw)
To: kernel test robot
Cc: Andrew Morton, oe-kbuild-all, David Hildenbrand,
Linux Memory Management List, mm-commits, Muchun Song
On Thu, Sep 10, 2026 at 7:41 AM kernel test robot <lkp@intel.com> wrote:
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
> head: cf558a250cf4475a8936902b8978fbb6c61016f8
> commit: dd35ca2f2cac9d6439a2ba2f523b98b5a9a9f8f5 [358/388] mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages-fix
> config: s390-randconfig-r121-20260910 (https://download.01.org/0day-ci/archive/20260910/202609102250.lIycVv3n-lkp@intel.com/config)
> compiler: s390-linux-gcc (GCC) 13.4.0
> sparse: v0.6.5-rc1
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260910/202609102250.lIycVv3n-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/202609102250.lIycVv3n-lkp@intel.com/
>
> All error/warnings (new ones prefixed by >>):
>
> mm/sparse-vmemmap.c: In function 'vmemmap_populate_compound_pages':
> >> mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'? [-Werror=implicit-function-declaration]
> 507 | page = vmemmap_shared_tail_page(order, device_zone(node));
> | ^~~~~~~~~~~
> | device_move
> >> mm/sparse-vmemmap.c:507:48: warning: passing argument 2 of 'vmemmap_shared_tail_page' makes pointer from integer without a cast [-Wint-conversion]
> 507 | page = vmemmap_shared_tail_page(order, device_zone(node));
> | ^~~~~~~~~~~~~~~~~
> | |
> | int
> mm/sparse-vmemmap.c:172:78: note: expected 'struct zone *' but argument is of type 'int'
> 172 | struct page __ref *vmemmap_shared_tail_page(unsigned int order, struct zone *zone)
> | ~~~~~~~~~~~~~^~~~
> cc1: some warnings being treated as errors
I think this breakage happens if CONFIG_ZONE_DEVICE=n.
The mm-new branch build breakage can be easily reproduced with defconfig on x86.
>
>
> vim +507 mm/sparse-vmemmap.c
>
> 4917f55b4ef963 Joao Martins 2022-04-28 494
> 4917f55b4ef963 Joao Martins 2022-04-28 495 static int __meminit vmemmap_populate_compound_pages(unsigned long start_pfn,
> 4917f55b4ef963 Joao Martins 2022-04-28 496 unsigned long start,
> 4917f55b4ef963 Joao Martins 2022-04-28 497 unsigned long end, int node,
> 4917f55b4ef963 Joao Martins 2022-04-28 498 struct dev_pagemap *pgmap)
> 4917f55b4ef963 Joao Martins 2022-04-28 499 {
> 4917f55b4ef963 Joao Martins 2022-04-28 500 unsigned long size, addr;
> 4917f55b4ef963 Joao Martins 2022-04-28 501 pte_t *pte;
> 4917f55b4ef963 Joao Martins 2022-04-28 502 int rc;
> d1d11861d8a018 Muchun Song 2026-09-08 503 unsigned long flags = VMEMMAP_POPULATE_DAX;
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 504 struct page *page;
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 505 unsigned int order = pfn_to_section_order(start_pfn);
> 4917f55b4ef963 Joao Martins 2022-04-28 506
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 @507 page = vmemmap_shared_tail_page(order, device_zone(node));
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 508 if (!page)
> 4917f55b4ef963 Joao Martins 2022-04-28 509 return -ENOMEM;
> 4917f55b4ef963 Joao Martins 2022-04-28 510
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 511 if (reuse_compound_section(start_pfn, pgmap))
> 4917f55b4ef963 Joao Martins 2022-04-28 512 return vmemmap_populate_range(start, end, node, NULL,
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 513 page_to_pfn(page), flags);
> 4917f55b4ef963 Joao Martins 2022-04-28 514
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 515 size = min(end - start, (1UL << order) * sizeof(struct page));
> 4917f55b4ef963 Joao Martins 2022-04-28 516 for (addr = start; addr < end; addr += size) {
> 55896f935a60b9 Gautam Menghani 2022-06-12 517 unsigned long next, last = addr + size;
> 4917f55b4ef963 Joao Martins 2022-04-28 518
> 4917f55b4ef963 Joao Martins 2022-04-28 519 /* Populate the head page vmemmap page */
> d1d11861d8a018 Muchun Song 2026-09-08 520 pte = vmemmap_populate_address(addr, node, NULL, -1, flags);
> 4917f55b4ef963 Joao Martins 2022-04-28 521 if (!pte)
> 4917f55b4ef963 Joao Martins 2022-04-28 522 return -ENOMEM;
> 4917f55b4ef963 Joao Martins 2022-04-28 523
> 4917f55b4ef963 Joao Martins 2022-04-28 524 /* Populate the tail pages vmemmap page */
> 4917f55b4ef963 Joao Martins 2022-04-28 525 next = addr + PAGE_SIZE;
> d1d11861d8a018 Muchun Song 2026-09-08 526 pte = vmemmap_populate_address(next, node, NULL, -1, flags);
> 4917f55b4ef963 Joao Martins 2022-04-28 527 if (!pte)
> 4917f55b4ef963 Joao Martins 2022-04-28 528 return -ENOMEM;
> 4917f55b4ef963 Joao Martins 2022-04-28 529
> 4917f55b4ef963 Joao Martins 2022-04-28 530 /*
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 531 * Reuse the shared page for the rest of tail pages
> ee65728e103bb7 Mike Rapoport 2022-06-27 532 * See layout diagram in Documentation/mm/vmemmap_dedup.rst
> 4917f55b4ef963 Joao Martins 2022-04-28 533 */
> 4917f55b4ef963 Joao Martins 2022-04-28 534 next += PAGE_SIZE;
> 4917f55b4ef963 Joao Martins 2022-04-28 535 rc = vmemmap_populate_range(next, last, node, NULL,
> 8fbaacc4a64bd1 Muchun Song 2026-09-08 536 page_to_pfn(page), flags);
> 4917f55b4ef963 Joao Martins 2022-04-28 537 if (rc)
> 4917f55b4ef963 Joao Martins 2022-04-28 538 return -ENOMEM;
> 4917f55b4ef963 Joao Martins 2022-04-28 539 }
> 4917f55b4ef963 Joao Martins 2022-04-28 540
> 4917f55b4ef963 Joao Martins 2022-04-28 541 return 0;
> 2beea70a3edc03 Joao Martins 2022-04-28 542 }
> 2beea70a3edc03 Joao Martins 2022-04-28 543
>
> :::::: The code at line 507 was first introduced by commit
> :::::: 8fbaacc4a64bd1bfbfb11bfb48b5db3f4943cbd7 mm/sparse-vmemmap: switch device DAX to shared tail vmemmap pages
>
> :::::: TO: Muchun Song <songmuchun@bytedance.com>
> :::::: CC: Andrew Morton <akpm@linux-foundation.org>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [akpm-mm:mm-new 358/388] mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'?
2026-09-10 15:16 ` Suren Baghdasaryan
@ 2026-09-10 15:22 ` Suren Baghdasaryan
0 siblings, 0 replies; 3+ messages in thread
From: Suren Baghdasaryan @ 2026-09-10 15:22 UTC (permalink / raw)
To: kernel test robot
Cc: Andrew Morton, oe-kbuild-all, David Hildenbrand,
Linux Memory Management List, mm-commits, Muchun Song
On Thu, Sep 10, 2026 at 8:16 AM Suren Baghdasaryan <surenb@google.com> wrote:
>
> On Thu, Sep 10, 2026 at 7:41 AM kernel test robot <lkp@intel.com> wrote:
> >
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
> > head: cf558a250cf4475a8936902b8978fbb6c61016f8
> > commit: dd35ca2f2cac9d6439a2ba2f523b98b5a9a9f8f5 [358/388] mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages-fix
> > config: s390-randconfig-r121-20260910 (https://download.01.org/0day-ci/archive/20260910/202609102250.lIycVv3n-lkp@intel.com/config)
> > compiler: s390-linux-gcc (GCC) 13.4.0
> > sparse: v0.6.5-rc1
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260910/202609102250.lIycVv3n-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/202609102250.lIycVv3n-lkp@intel.com/
> >
> > All error/warnings (new ones prefixed by >>):
> >
> > mm/sparse-vmemmap.c: In function 'vmemmap_populate_compound_pages':
> > >> mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'? [-Werror=implicit-function-declaration]
> > 507 | page = vmemmap_shared_tail_page(order, device_zone(node));
> > | ^~~~~~~~~~~
> > | device_move
> > >> mm/sparse-vmemmap.c:507:48: warning: passing argument 2 of 'vmemmap_shared_tail_page' makes pointer from integer without a cast [-Wint-conversion]
> > 507 | page = vmemmap_shared_tail_page(order, device_zone(node));
> > | ^~~~~~~~~~~~~~~~~
> > | |
> > | int
> > mm/sparse-vmemmap.c:172:78: note: expected 'struct zone *' but argument is of type 'int'
> > 172 | struct page __ref *vmemmap_shared_tail_page(unsigned int order, struct zone *zone)
> > | ~~~~~~~~~~~~~^~~~
> > cc1: some warnings being treated as errors
>
> I think this breakage happens if CONFIG_ZONE_DEVICE=n.
Sorry, it's the combination of CONFIG_ZONE_DEVICE=n && CONFIG_NUMA=y.
This seems to fix it:
---
include/linux/mmzone.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 136235b6975d..0e4c09f4ad3b 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1700,7 +1700,7 @@ static inline bool zone_is_zone_device(const
struct zone *zone)
}
#endif
-#if !defined(CONFIG_ZONE_DEVICE) && !defined(CONFIG_NUMA)
+#if !defined(CONFIG_ZONE_DEVICE)
static inline struct zone *device_zone(int nid)
{
return NULL;
--
> The mm-new branch build breakage can be easily reproduced with defconfig on x86.
>
> >
> >
> > vim +507 mm/sparse-vmemmap.c
> >
> > 4917f55b4ef963 Joao Martins 2022-04-28 494
> > 4917f55b4ef963 Joao Martins 2022-04-28 495 static int __meminit vmemmap_populate_compound_pages(unsigned long start_pfn,
> > 4917f55b4ef963 Joao Martins 2022-04-28 496 unsigned long start,
> > 4917f55b4ef963 Joao Martins 2022-04-28 497 unsigned long end, int node,
> > 4917f55b4ef963 Joao Martins 2022-04-28 498 struct dev_pagemap *pgmap)
> > 4917f55b4ef963 Joao Martins 2022-04-28 499 {
> > 4917f55b4ef963 Joao Martins 2022-04-28 500 unsigned long size, addr;
> > 4917f55b4ef963 Joao Martins 2022-04-28 501 pte_t *pte;
> > 4917f55b4ef963 Joao Martins 2022-04-28 502 int rc;
> > d1d11861d8a018 Muchun Song 2026-09-08 503 unsigned long flags = VMEMMAP_POPULATE_DAX;
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 504 struct page *page;
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 505 unsigned int order = pfn_to_section_order(start_pfn);
> > 4917f55b4ef963 Joao Martins 2022-04-28 506
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 @507 page = vmemmap_shared_tail_page(order, device_zone(node));
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 508 if (!page)
> > 4917f55b4ef963 Joao Martins 2022-04-28 509 return -ENOMEM;
> > 4917f55b4ef963 Joao Martins 2022-04-28 510
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 511 if (reuse_compound_section(start_pfn, pgmap))
> > 4917f55b4ef963 Joao Martins 2022-04-28 512 return vmemmap_populate_range(start, end, node, NULL,
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 513 page_to_pfn(page), flags);
> > 4917f55b4ef963 Joao Martins 2022-04-28 514
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 515 size = min(end - start, (1UL << order) * sizeof(struct page));
> > 4917f55b4ef963 Joao Martins 2022-04-28 516 for (addr = start; addr < end; addr += size) {
> > 55896f935a60b9 Gautam Menghani 2022-06-12 517 unsigned long next, last = addr + size;
> > 4917f55b4ef963 Joao Martins 2022-04-28 518
> > 4917f55b4ef963 Joao Martins 2022-04-28 519 /* Populate the head page vmemmap page */
> > d1d11861d8a018 Muchun Song 2026-09-08 520 pte = vmemmap_populate_address(addr, node, NULL, -1, flags);
> > 4917f55b4ef963 Joao Martins 2022-04-28 521 if (!pte)
> > 4917f55b4ef963 Joao Martins 2022-04-28 522 return -ENOMEM;
> > 4917f55b4ef963 Joao Martins 2022-04-28 523
> > 4917f55b4ef963 Joao Martins 2022-04-28 524 /* Populate the tail pages vmemmap page */
> > 4917f55b4ef963 Joao Martins 2022-04-28 525 next = addr + PAGE_SIZE;
> > d1d11861d8a018 Muchun Song 2026-09-08 526 pte = vmemmap_populate_address(next, node, NULL, -1, flags);
> > 4917f55b4ef963 Joao Martins 2022-04-28 527 if (!pte)
> > 4917f55b4ef963 Joao Martins 2022-04-28 528 return -ENOMEM;
> > 4917f55b4ef963 Joao Martins 2022-04-28 529
> > 4917f55b4ef963 Joao Martins 2022-04-28 530 /*
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 531 * Reuse the shared page for the rest of tail pages
> > ee65728e103bb7 Mike Rapoport 2022-06-27 532 * See layout diagram in Documentation/mm/vmemmap_dedup.rst
> > 4917f55b4ef963 Joao Martins 2022-04-28 533 */
> > 4917f55b4ef963 Joao Martins 2022-04-28 534 next += PAGE_SIZE;
> > 4917f55b4ef963 Joao Martins 2022-04-28 535 rc = vmemmap_populate_range(next, last, node, NULL,
> > 8fbaacc4a64bd1 Muchun Song 2026-09-08 536 page_to_pfn(page), flags);
> > 4917f55b4ef963 Joao Martins 2022-04-28 537 if (rc)
> > 4917f55b4ef963 Joao Martins 2022-04-28 538 return -ENOMEM;
> > 4917f55b4ef963 Joao Martins 2022-04-28 539 }
> > 4917f55b4ef963 Joao Martins 2022-04-28 540
> > 4917f55b4ef963 Joao Martins 2022-04-28 541 return 0;
> > 2beea70a3edc03 Joao Martins 2022-04-28 542 }
> > 2beea70a3edc03 Joao Martins 2022-04-28 543
> >
> > :::::: The code at line 507 was first introduced by commit
> > :::::: 8fbaacc4a64bd1bfbfb11bfb48b5db3f4943cbd7 mm/sparse-vmemmap: switch device DAX to shared tail vmemmap pages
> >
> > :::::: TO: Muchun Song <songmuchun@bytedance.com>
> > :::::: CC: Andrew Morton <akpm@linux-foundation.org>
> >
> > --
> > 0-DAY CI Kernel Test Service
> > https://github.com/intel/lkp-tests/wiki
> >
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2026-09-10 14:31 [akpm-mm:mm-new 358/388] mm/sparse-vmemmap.c:507:48: error: implicit declaration of function 'device_zone'; did you mean 'device_move'? kernel test robot
2026-09-10 15:16 ` Suren Baghdasaryan
2026-09-10 15:22 ` Suren Baghdasaryan
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