* [akpm-mm:mm-unstable 274/423] mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'l...
@ 2026-06-03 2:29 kernel test robot
2026-06-03 5:53 ` Mike Rapoport
0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2026-06-03 2:29 UTC (permalink / raw)
To: Mike Rapoport (Microsoft)
Cc: oe-kbuild-all, David Hildenbrand, Andrew Morton,
Linux Memory Management List, mm-commits,
Christian Brauner (Amutable)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head: 6bb9014e347a15dfa837cbc52451035466d86ddf
commit: 53313230f720eaaf9f1f6d20faafd7e01a9e09b7 [274/423] userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c
config: riscv-randconfig-r122-20260529 (https://download.01.org/0day-ci/archive/20260603/202606031038.1aPfmoCm-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9409c07de6378507397ecdb6f05f628f58110112)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260603/202606031038.1aPfmoCm-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/202606031038.1aPfmoCm-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'long (typeof (__builtin_choose_expr((__builtin_types_compatible_p(typeof ((int)0), typeof (0LL)) || __builtin_types_compatible_p(typeof ((int)0), typeof (0ULL))), 0LL, 0L)))' (aka 'long (long)') [-Wattribute-alias]
4475 | SYSCALL_DEFINE1(userfaultfd, int, flags)
| ^
include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
| ^
include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
236 | __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
| ^
arch/riscv/include/asm/syscall_wrapper.h:82:2: note: expanded from macro '__SYSCALL_DEFINEx'
82 | __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
| ^
arch/riscv/include/asm/syscall_wrapper.h:37:19: note: expanded from macro '__SYSCALL_SE_DEFINEx'
37 | __attribute__((alias(__stringify(___se_##prefix##name)))); \
| ^
mm/userfaultfd.c:4475:1: note: aliasee is declared here
include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
| ^
include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
236 | __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
| ^
arch/riscv/include/asm/syscall_wrapper.h:82:2: note: expanded from macro '__SYSCALL_DEFINEx'
82 | __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
| ^
arch/riscv/include/asm/syscall_wrapper.h:41:14: note: expanded from macro '__SYSCALL_SE_DEFINEx'
41 | static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
| ^
<scratch space>:148:1: note: expanded from here
148 | ___se_sys_userfaultfd
| ^
1 warning generated.
vim +4475 mm/userfaultfd.c
4474
> 4475 SYSCALL_DEFINE1(userfaultfd, int, flags)
4476 {
4477 if (!userfaultfd_syscall_allowed(flags))
4478 return -EPERM;
4479
4480 return new_userfaultfd(flags);
4481 }
4482
--
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-unstable 274/423] mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'l...
2026-06-03 2:29 [akpm-mm:mm-unstable 274/423] mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'l kernel test robot
@ 2026-06-03 5:53 ` Mike Rapoport
2026-06-04 1:19 ` Nathan Chancellor
0 siblings, 1 reply; 3+ messages in thread
From: Mike Rapoport @ 2026-06-03 5:53 UTC (permalink / raw)
To: kernel test robot, Nathan Chancellor
Cc: oe-kbuild-all, David Hildenbrand, Andrew Morton,
Linux Memory Management List, mm-commits,
Christian Brauner (Amutable)
(adding Nathan)
On Wed, Jun 03, 2026 at 10:29:32AM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
> head: 6bb9014e347a15dfa837cbc52451035466d86ddf
> commit: 53313230f720eaaf9f1f6d20faafd7e01a9e09b7 [274/423] userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c
> config: riscv-randconfig-r122-20260529 (https://download.01.org/0day-ci/archive/20260603/202606031038.1aPfmoCm-lkp@intel.com/config)
> compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9409c07de6378507397ecdb6f05f628f58110112)
> sparse: v0.6.5-rc1
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260603/202606031038.1aPfmoCm-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/202606031038.1aPfmoCm-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
Looks the same as https://lore.kernel.org/all/20260528164552.GB1342076@ax162
Nathan said it's a compiler issue.
> >> mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'long (typeof (__builtin_choose_expr((__builtin_types_compatible_p(typeof ((int)0), typeof (0LL)) || __builtin_types_compatible_p(typeof ((int)0), typeof (0ULL))), 0LL, 0L)))' (aka 'long (long)') [-Wattribute-alias]
> 4475 | SYSCALL_DEFINE1(userfaultfd, int, flags)
> | ^
> include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
> 225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
> | ^
> include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
> 236 | __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> | ^
> arch/riscv/include/asm/syscall_wrapper.h:82:2: note: expanded from macro '__SYSCALL_DEFINEx'
> 82 | __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
> | ^
> arch/riscv/include/asm/syscall_wrapper.h:37:19: note: expanded from macro '__SYSCALL_SE_DEFINEx'
> 37 | __attribute__((alias(__stringify(___se_##prefix##name)))); \
> | ^
> mm/userfaultfd.c:4475:1: note: aliasee is declared here
> include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
> 225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
> | ^
> include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
> 236 | __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> | ^
> arch/riscv/include/asm/syscall_wrapper.h:82:2: note: expanded from macro '__SYSCALL_DEFINEx'
> 82 | __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
> | ^
> arch/riscv/include/asm/syscall_wrapper.h:41:14: note: expanded from macro '__SYSCALL_SE_DEFINEx'
> 41 | static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
> | ^
> <scratch space>:148:1: note: expanded from here
> 148 | ___se_sys_userfaultfd
> | ^
> 1 warning generated.
>
>
> vim +4475 mm/userfaultfd.c
>
> 4474
> > 4475 SYSCALL_DEFINE1(userfaultfd, int, flags)
> 4476 {
> 4477 if (!userfaultfd_syscall_allowed(flags))
> 4478 return -EPERM;
> 4479
> 4480 return new_userfaultfd(flags);
> 4481 }
> 4482
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
--
Sincerely yours,
Mike.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [akpm-mm:mm-unstable 274/423] mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'l...
2026-06-03 5:53 ` Mike Rapoport
@ 2026-06-04 1:19 ` Nathan Chancellor
0 siblings, 0 replies; 3+ messages in thread
From: Nathan Chancellor @ 2026-06-04 1:19 UTC (permalink / raw)
To: Mike Rapoport
Cc: kernel test robot, oe-kbuild-all, David Hildenbrand,
Andrew Morton, Linux Memory Management List, mm-commits,
Christian Brauner (Amutable)
On Wed, Jun 03, 2026 at 08:53:48AM +0300, Mike Rapoport wrote:
> (adding Nathan)
>
> On Wed, Jun 03, 2026 at 10:29:32AM +0800, kernel test robot wrote:
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
> > head: 6bb9014e347a15dfa837cbc52451035466d86ddf
> > commit: 53313230f720eaaf9f1f6d20faafd7e01a9e09b7 [274/423] userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c
> > config: riscv-randconfig-r122-20260529 (https://download.01.org/0day-ci/archive/20260603/202606031038.1aPfmoCm-lkp@intel.com/config)
> > compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9409c07de6378507397ecdb6f05f628f58110112)
> > sparse: v0.6.5-rc1
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260603/202606031038.1aPfmoCm-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/202606031038.1aPfmoCm-lkp@intel.com/
> >
> > All warnings (new ones prefixed by >>):
>
> Looks the same as https://lore.kernel.org/all/20260528164552.GB1342076@ax162
> Nathan said it's a compiler issue.
Indeed, this should be resolved in Linus's tree with
175db11786bd ("Disable -Wattribute-alias for clang-23 and newer")
> > >> mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'long (typeof (__builtin_choose_expr((__builtin_types_compatible_p(typeof ((int)0), typeof (0LL)) || __builtin_types_compatible_p(typeof ((int)0), typeof (0ULL))), 0LL, 0L)))' (aka 'long (long)') [-Wattribute-alias]
> > 4475 | SYSCALL_DEFINE1(userfaultfd, int, flags)
> > | ^
> > include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
> > 225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
> > | ^
> > include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
> > 236 | __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > | ^
> > arch/riscv/include/asm/syscall_wrapper.h:82:2: note: expanded from macro '__SYSCALL_DEFINEx'
> > 82 | __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
> > | ^
> > arch/riscv/include/asm/syscall_wrapper.h:37:19: note: expanded from macro '__SYSCALL_SE_DEFINEx'
> > 37 | __attribute__((alias(__stringify(___se_##prefix##name)))); \
> > | ^
> > mm/userfaultfd.c:4475:1: note: aliasee is declared here
> > include/linux/syscalls.h:225:36: note: expanded from macro 'SYSCALL_DEFINE1'
> > 225 | #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
> > | ^
> > include/linux/syscalls.h:236:2: note: expanded from macro 'SYSCALL_DEFINEx'
> > 236 | __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> > | ^
> > arch/riscv/include/asm/syscall_wrapper.h:82:2: note: expanded from macro '__SYSCALL_DEFINEx'
> > 82 | __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
> > | ^
> > arch/riscv/include/asm/syscall_wrapper.h:41:14: note: expanded from macro '__SYSCALL_SE_DEFINEx'
> > 41 | static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
> > | ^
> > <scratch space>:148:1: note: expanded from here
> > 148 | ___se_sys_userfaultfd
> > | ^
> > 1 warning generated.
> >
> >
> > vim +4475 mm/userfaultfd.c
> >
> > 4474
> > > 4475 SYSCALL_DEFINE1(userfaultfd, int, flags)
> > 4476 {
> > 4477 if (!userfaultfd_syscall_allowed(flags))
> > 4478 return -EPERM;
> > 4479
> > 4480 return new_userfaultfd(flags);
> > 4481 }
> > 4482
> >
> > --
> > 0-DAY CI Kernel Test Service
> > https://github.com/intel/lkp-tests/wiki
>
> --
> Sincerely yours,
> Mike.
--
Cheers,
Nathan
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-06-04 1:19 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2026-06-03 2:29 [akpm-mm:mm-unstable 274/423] mm/userfaultfd.c:4475:1: warning: alias and aliasee have different types 'long (ulong, ulong, ulong, ulong, ulong, ulong, ulong)' (aka 'long (unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)') and 'l kernel test robot
2026-06-03 5:53 ` Mike Rapoport
2026-06-04 1:19 ` Nathan Chancellor
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