* arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchroot' 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 unsigne...
@ 2026-09-19 11:08 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-09-19 11:08 UTC (permalink / raw)
To: Christian Brauner; +Cc: oe-kbuild-all, linux-kernel
Hi Christian,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 40288c9206c17eb66a603262e06a58d300d0f279
commit: 20370a5f5d9b1549ab3bf10a898b4e024b8841fa fs: add fchroot()
date: 8 weeks ago
config: riscv-randconfig-r2106-20260919 (https://download.01.org/0day-ci/archive/20260919/202609191311.YMMsWkbk-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/20260919/202609191311.YMMsWkbk-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
| Fixes: 20370a5f5d9b ("fs: add fchroot()")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609191311.YMMsWkbk-lkp@intel.com/
All warnings (new ones prefixed by >>):
^~~~~~~~~~~~~~~~~~~~
include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:226:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:736:1: note: in expansion of macro 'SYSCALL_DEFINE2'
SYSCALL_DEFINE2(chmod, const char __user *, filename, umode_t, mode)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchmodat' 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)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:227:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:730:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:227:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:730:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchmodat2' 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)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:228:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:724:1: note: in expansion of macro 'SYSCALL_DEFINE4'
SYSCALL_DEFINE4(fchmodat2, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:228:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:724:1: note: in expansion of macro 'SYSCALL_DEFINE4'
SYSCALL_DEFINE4(fchmodat2, int, dfd, const char __user *, filename,
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchmod' 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)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:226:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:689:1: note: in expansion of macro 'SYSCALL_DEFINE2'
SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:226:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:689:1: note: in expansion of macro 'SYSCALL_DEFINE2'
SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
^~~~~~~~~~~~~~~
>> arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchroot' 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)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:226:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:621:1: note: in expansion of macro 'SYSCALL_DEFINE2'
SYSCALL_DEFINE2(fchroot, int, fd, unsigned int, flags)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:226:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:621:1: note: in expansion of macro 'SYSCALL_DEFINE2'
SYSCALL_DEFINE2(fchroot, int, fd, unsigned int, flags)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_chroot' 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)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:225:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:591:1: note: in expansion of macro 'SYSCALL_DEFINE1'
SYSCALL_DEFINE1(chroot, const char __user *, filename)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:225:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:591:1: note: in expansion of macro 'SYSCALL_DEFINE1'
SYSCALL_DEFINE1(chroot, const char __user *, filename)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchdir' 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)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:225:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:571:1: note: in expansion of macro 'SYSCALL_DEFINE1'
SYSCALL_DEFINE1(fchdir, unsigned int, fd)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here
static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
^~~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:225:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
fs/open.c:571:1: note: in expansion of macro 'SYSCALL_DEFINE1'
SYSCALL_DEFINE1(fchdir, unsigned int, fd)
^~~~~~~~~~~~~~~
arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_chdir' 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)' [-Wattribute-alias]
static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
^~~~~
arch/riscv/include/asm/syscall_wrapper.h:86:2: 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:225:36: note: in expansion of macro 'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
vim +39 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", \
175db11786bde9 Nathan Chancellor 2026-05-16 34 "Type aliasing is used to sanitize syscall arguments"); \
175db11786bde9 Nathan Chancellor 2026-05-16 35 __diag_ignore(clang, 23, "-Wunknown-warning-option", \
175db11786bde9 Nathan Chancellor 2026-05-16 36 "Avoid breaking versions without -Wattribute-alias"); \
175db11786bde9 Nathan Chancellor 2026-05-16 37 __diag_ignore(clang, 23, "-Wattribute-alias", \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 38 "Type aliasing is used to sanitize syscall arguments"); \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 @39 static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 40 ulong) \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 41 __attribute__((alias(__stringify(___se_##prefix##name)))); \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 42 __diag_pop(); \
653650c468be21 Sami Tolvanen 2024-03-26 43 static long noinline ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
653650c468be21 Sami Tolvanen 2024-03-26 44 __used; \
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 45 static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 46
:::::: The code at line 39 was first introduced by commit
:::::: a9ad73295cc1e3af0253eee7d08943b2419444c4 riscv: Fix syscall wrapper for >word-size arguments
:::::: TO: Sami Tolvanen <samitolvanen@google.com>
:::::: CC: Palmer Dabbelt <palmer@rivosinc.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-09-19 11:08 arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchroot' 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 unsigne kernel test robot
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