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Message-ID: <202512161808.agO7LlhE-lkp@intel.com>
Date: Tue, 16 Dec 2025 18:59:12 +0800
From: kernel test robot <lkp@...el.com>
To: Andrey Albershteyn <aalbersh@...hat.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Christian Brauner <brauner@...nel.org>
Subject: arch/riscv/include/asm/syscall_wrapper.h:35:14: warning:
'__se_sys_file_setattr' alias between functions of incompatible types 'long
int(ulong, ulong, ulong, ulong, ulong, ulong, ulong)' {aka 'long
int(long unsigned int, long unsigned int, long un...
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 40fbbd64bba6c6e7a72885d2f59b6a3be9991eeb
commit: be7efb2d20d67f334a7de2aef77ae6c69367e646 fs: introduce file_getattr and file_setattr syscalls
date: 6 months ago
config: riscv-randconfig-r061-20251216 (https://download.01.org/0day-ci/archive/20251216/202512161808.agO7LlhE-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251216/202512161808.agO7LlhE-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512161808.agO7LlhE-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/linux/compat.h:34,
from arch/riscv/include/asm/elf.h:12,
from include/linux/elf.h:6,
from include/linux/module.h:19,
from include/linux/bpf.h:20,
from include/linux/security.h:35,
from fs/file_attr.c:3:
arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_file_getattr' alias between functions of incompatible types 'long int(ulong, ulong, ulong, ulong, ulong, ulong, ulong)' {aka 'long int(long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int)'} and 'long int(long int, long int, long int, long int, long int)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
__SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
^~~~~~~~~~~~~~~~~~~~
include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:229:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/file_attr.c:382:1: note: in expansion of macro 'SYSCALL_DEFINE5'
SYSCALL_DEFINE5(file_getattr, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:41:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
__SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
^~~~~~~~~~~~~~~~~~~~
include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:229:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/file_attr.c:382:1: note: in expansion of macro 'SYSCALL_DEFINE5'
SYSCALL_DEFINE5(file_getattr, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
>> arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_file_setattr' alias between functions of incompatible types 'long int(ulong, ulong, ulong, ulong, ulong, ulong, ulong)' {aka 'long int(long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int)'} and 'long int(long int, long int, long int, long int, long int)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
__SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
^~~~~~~~~~~~~~~~~~~~
include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:229:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/file_attr.c:437:1: note: in expansion of macro 'SYSCALL_DEFINE5'
SYSCALL_DEFINE5(file_setattr, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:41:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
__SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \
^~~~~~~~~~~~~~~~~~~~
include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:229:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/file_attr.c:437:1: note: in expansion of macro 'SYSCALL_DEFINE5'
SYSCALL_DEFINE5(file_setattr, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
vim +35 arch/riscv/include/asm/syscall_wrapper.h
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 16
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 17 #define __SYSCALL_SE_DEFINEx(x, prefix, name, ...) \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 18 static long __se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 19 static long __se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 20
08d0ce30e0e4fc Sami Tolvanen 2023-07-10 21 #define SC_RISCV_REGS_TO_ARGS(x, ...) \
08d0ce30e0e4fc Sami Tolvanen 2023-07-10 22 __MAP(x,__SC_ARGS \
08d0ce30e0e4fc Sami Tolvanen 2023-07-10 23 ,,regs->orig_a0,,regs->a1,,regs->a2 \
08d0ce30e0e4fc Sami Tolvanen 2023-07-10 24 ,,regs->a3,,regs->a4,,regs->a5,,regs->a6)
08d0ce30e0e4fc Sami Tolvanen 2023-07-10 25
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 26 #else
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 27 /*
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 28 * Use type aliasing to ensure registers a0-a6 are correctly passed to the syscall
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 29 * implementation when >word-size arguments are used.
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 30 */
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 31 #define __SYSCALL_SE_DEFINEx(x, prefix, name, ...) \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 32 __diag_push(); \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 33 __diag_ignore(GCC, 8, "-Wattribute-alias", \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 34 "Type aliasing is used to sanitize syscall arguments"); \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 @35 static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 36 ulong) \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 37 __attribute__((alias(__stringify(___se_##prefix##name)))); \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 38 __diag_pop(); \
653650c468be21 Sami Tolvanen 2024-03-26 39 static long noinline ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
653650c468be21 Sami Tolvanen 2024-03-26 40 __used; \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 41 static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 42
:::::: The code at line 35 was first introduced by commit
:::::: a9ad73295cc1e3af0253eee7d08943b2419444c4 riscv: Fix syscall wrapper for >word-size arguments
:::::: TO: Sami Tolvanen <samitolvanen@...gle.com>
:::::: CC: Palmer Dabbelt <palmer@...osinc.com>
--
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