[PATCH V12 2/5] mm: userfaultfd: Add pgtable_supports_uffd_wp()
kernel test robot
lkp at intel.com
Mon Sep 15 22:55:38 PDT 2025
Hi Chunyan,
kernel test robot noticed the following build errors:
[auto build test ERROR on brauner-vfs/vfs.all]
[also build test ERROR on kees/for-next/execve linus/master v6.17-rc6]
[cannot apply to akpm-mm/mm-everything next-20250915]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Chunyan-Zhang/mm-softdirty-Add-pgtable_supports_soft_dirty/20250915-181826
base: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all
patch link: https://lore.kernel.org/r/20250915101343.1449546-3-zhangchunyan%40iscas.ac.cn
patch subject: [PATCH V12 2/5] mm: userfaultfd: Add pgtable_supports_uffd_wp()
config: riscv-randconfig-002-20250916 (https://download.01.org/0day-ci/archive/20250916/202509161304.mQnxOxhS-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250916/202509161304.mQnxOxhS-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509161304.mQnxOxhS-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from include/linux/mm_inline.h:10,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
include/linux/userfaultfd_k.h: In function 'pte_marker_entry_uffd_wp':
>> include/linux/userfaultfd_k.h:441:9: error: implicit declaration of function 'is_pte_marker_entry' [-Werror=implicit-function-declaration]
441 | return is_pte_marker_entry(entry) &&
| ^~~~~~~~~~~~~~~~~~~
>> include/linux/userfaultfd_k.h:442:10: error: implicit declaration of function 'pte_marker_get' [-Werror=implicit-function-declaration]
442 | (pte_marker_get(entry) & PTE_MARKER_UFFD_WP);
| ^~~~~~~~~~~~~~
>> include/linux/userfaultfd_k.h:442:34: error: 'PTE_MARKER_UFFD_WP' undeclared (first use in this function)
442 | (pte_marker_get(entry) & PTE_MARKER_UFFD_WP);
| ^~~~~~~~~~~~~~~~~~
include/linux/userfaultfd_k.h:442:34: note: each undeclared identifier is reported only once for each function it appears in
include/linux/userfaultfd_k.h: In function 'pte_marker_uffd_wp':
>> include/linux/userfaultfd_k.h:452:7: error: implicit declaration of function 'is_swap_pte'; did you mean 'is_swap_pmd'? [-Werror=implicit-function-declaration]
452 | if (!is_swap_pte(pte))
| ^~~~~~~~~~~
| is_swap_pmd
>> include/linux/userfaultfd_k.h:455:10: error: implicit declaration of function 'pte_to_swp_entry' [-Werror=implicit-function-declaration]
455 | entry = pte_to_swp_entry(pte);
| ^~~~~~~~~~~~~~~~
>> include/linux/userfaultfd_k.h:455:10: error: incompatible types when assigning to type 'swp_entry_t' from type 'int'
In file included from include/linux/mm_inline.h:11,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
include/linux/swapops.h: At top level:
>> include/linux/swapops.h:124:19: error: static declaration of 'is_swap_pte' follows non-static declaration
124 | static inline int is_swap_pte(pte_t pte)
| ^~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
include/linux/userfaultfd_k.h:452:7: note: previous implicit declaration of 'is_swap_pte' was here
452 | if (!is_swap_pte(pte))
| ^~~~~~~~~~~
In file included from include/linux/mm_inline.h:11,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
>> include/linux/swapops.h:133:27: error: conflicting types for 'pte_to_swp_entry'
133 | static inline swp_entry_t pte_to_swp_entry(pte_t pte)
| ^~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
include/linux/userfaultfd_k.h:455:10: note: previous implicit declaration of 'pte_to_swp_entry' was here
455 | entry = pte_to_swp_entry(pte);
| ^~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:11,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
>> include/linux/swapops.h:429:20: error: conflicting types for 'is_pte_marker_entry'
429 | static inline bool is_pte_marker_entry(swp_entry_t entry)
| ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
include/linux/userfaultfd_k.h:441:9: note: previous implicit declaration of 'is_pte_marker_entry' was here
441 | return is_pte_marker_entry(entry) &&
| ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:11,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
>> include/linux/swapops.h:434:26: error: conflicting types for 'pte_marker_get'
434 | static inline pte_marker pte_marker_get(swp_entry_t entry)
| ^~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/internal.h:13,
from mm/page_frag_cache.c:21:
include/linux/userfaultfd_k.h:442:10: note: previous implicit declaration of 'pte_marker_get' was here
442 | (pte_marker_get(entry) & PTE_MARKER_UFFD_WP);
| ^~~~~~~~~~~~~~
cc1: some warnings being treated as errors
--
In file included from include/linux/mm_inline.h:10,
from mm/mremap.c:12:
include/linux/userfaultfd_k.h: In function 'pte_marker_entry_uffd_wp':
>> include/linux/userfaultfd_k.h:441:9: error: implicit declaration of function 'is_pte_marker_entry' [-Werror=implicit-function-declaration]
441 | return is_pte_marker_entry(entry) &&
| ^~~~~~~~~~~~~~~~~~~
>> include/linux/userfaultfd_k.h:442:10: error: implicit declaration of function 'pte_marker_get' [-Werror=implicit-function-declaration]
442 | (pte_marker_get(entry) & PTE_MARKER_UFFD_WP);
| ^~~~~~~~~~~~~~
>> include/linux/userfaultfd_k.h:442:34: error: 'PTE_MARKER_UFFD_WP' undeclared (first use in this function)
442 | (pte_marker_get(entry) & PTE_MARKER_UFFD_WP);
| ^~~~~~~~~~~~~~~~~~
include/linux/userfaultfd_k.h:442:34: note: each undeclared identifier is reported only once for each function it appears in
include/linux/userfaultfd_k.h: In function 'pte_marker_uffd_wp':
>> include/linux/userfaultfd_k.h:452:7: error: implicit declaration of function 'is_swap_pte'; did you mean 'is_swap_pmd'? [-Werror=implicit-function-declaration]
452 | if (!is_swap_pte(pte))
| ^~~~~~~~~~~
| is_swap_pmd
>> include/linux/userfaultfd_k.h:455:10: error: implicit declaration of function 'pte_to_swp_entry' [-Werror=implicit-function-declaration]
455 | entry = pte_to_swp_entry(pte);
| ^~~~~~~~~~~~~~~~
>> include/linux/userfaultfd_k.h:455:10: error: incompatible types when assigning to type 'swp_entry_t' from type 'int'
In file included from include/linux/mm_inline.h:11,
from mm/mremap.c:12:
include/linux/swapops.h: At top level:
>> include/linux/swapops.h:124:19: error: static declaration of 'is_swap_pte' follows non-static declaration
124 | static inline int is_swap_pte(pte_t pte)
| ^~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/mremap.c:12:
include/linux/userfaultfd_k.h:452:7: note: previous implicit declaration of 'is_swap_pte' was here
452 | if (!is_swap_pte(pte))
| ^~~~~~~~~~~
In file included from include/linux/mm_inline.h:11,
from mm/mremap.c:12:
>> include/linux/swapops.h:133:27: error: conflicting types for 'pte_to_swp_entry'
133 | static inline swp_entry_t pte_to_swp_entry(pte_t pte)
| ^~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/mremap.c:12:
include/linux/userfaultfd_k.h:455:10: note: previous implicit declaration of 'pte_to_swp_entry' was here
455 | entry = pte_to_swp_entry(pte);
| ^~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:11,
from mm/mremap.c:12:
>> include/linux/swapops.h:429:20: error: conflicting types for 'is_pte_marker_entry'
429 | static inline bool is_pte_marker_entry(swp_entry_t entry)
| ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/mremap.c:12:
include/linux/userfaultfd_k.h:441:9: note: previous implicit declaration of 'is_pte_marker_entry' was here
441 | return is_pte_marker_entry(entry) &&
| ^~~~~~~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:11,
from mm/mremap.c:12:
>> include/linux/swapops.h:434:26: error: conflicting types for 'pte_marker_get'
434 | static inline pte_marker pte_marker_get(swp_entry_t entry)
| ^~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/mremap.c:12:
include/linux/userfaultfd_k.h:442:10: note: previous implicit declaration of 'pte_marker_get' was here
442 | (pte_marker_get(entry) & PTE_MARKER_UFFD_WP);
| ^~~~~~~~~~~~~~
In file included from include/linux/mm_inline.h:10,
from mm/mremap.c:12:
include/linux/userfaultfd_k.h: In function 'pte_marker_entry_uffd_wp':
include/linux/userfaultfd_k.h:443:1: warning: control reaches end of non-void function [-Wreturn-type]
443 | }
| ^
cc1: some warnings being treated as errors
vim +/is_pte_marker_entry +441 include/linux/userfaultfd_k.h
2bad466cc9d9b4c Peter Xu 2023-03-09 435
1db9dbc2ef05205 Peter Xu 2022-05-12 436 static inline bool pte_marker_entry_uffd_wp(swp_entry_t entry)
1db9dbc2ef05205 Peter Xu 2022-05-12 437 {
564509f441b4695 Chunyan Zhang 2025-09-15 438 if (!uffd_supports_wp_marker())
564509f441b4695 Chunyan Zhang 2025-09-15 439 return false;
564509f441b4695 Chunyan Zhang 2025-09-15 440
1db9dbc2ef05205 Peter Xu 2022-05-12 @441 return is_pte_marker_entry(entry) &&
1db9dbc2ef05205 Peter Xu 2022-05-12 @442 (pte_marker_get(entry) & PTE_MARKER_UFFD_WP);
1db9dbc2ef05205 Peter Xu 2022-05-12 443 }
1db9dbc2ef05205 Peter Xu 2022-05-12 444
1db9dbc2ef05205 Peter Xu 2022-05-12 445 static inline bool pte_marker_uffd_wp(pte_t pte)
1db9dbc2ef05205 Peter Xu 2022-05-12 446 {
1db9dbc2ef05205 Peter Xu 2022-05-12 447 swp_entry_t entry;
1db9dbc2ef05205 Peter Xu 2022-05-12 448
564509f441b4695 Chunyan Zhang 2025-09-15 449 if (!uffd_supports_wp_marker())
564509f441b4695 Chunyan Zhang 2025-09-15 450 return false;
564509f441b4695 Chunyan Zhang 2025-09-15 451
1db9dbc2ef05205 Peter Xu 2022-05-12 @452 if (!is_swap_pte(pte))
1db9dbc2ef05205 Peter Xu 2022-05-12 453 return false;
1db9dbc2ef05205 Peter Xu 2022-05-12 454
1db9dbc2ef05205 Peter Xu 2022-05-12 @455 entry = pte_to_swp_entry(pte);
1db9dbc2ef05205 Peter Xu 2022-05-12 456
1db9dbc2ef05205 Peter Xu 2022-05-12 457 return pte_marker_entry_uffd_wp(entry);
1db9dbc2ef05205 Peter Xu 2022-05-12 458 }
1db9dbc2ef05205 Peter Xu 2022-05-12 459
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