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Message-ID: <202610311814.sISpHHXr-lkp@intel.com> User-Agent: s-nail v14.9.25 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Hi Mike, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 2a500a04d6f969318c05f46aedb6e73fc1963a00 commit: 7bc5e747bba29d5b77b2278e8c696eea0c796706 userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c date: 5 months ago config: riscv-randconfig-1000-20261031 (https://download.01.org/0day-ci/archive/20261031/202610311814.sISpHHXr-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/20261031/202610311814.sISpHHXr-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: 7bc5e747bba2 ("userfaultfd: merge fs/userfaultfd.c into mm/userfaultfd.c") | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202610311814.sISpHHXr-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:20, from include/linux/device/driver.h:21, from include/linux/device.h:32, from include/linux/blk_types.h:11, from include/linux/writeback.h:13, from include/linux/memcontrol.h:23, from include/linux/rmap.h:12, from mm/userfaultfd.c:16: >> arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_userfaultfd' 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: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:225:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ mm/userfaultfd.c:4475:1: note: in expansion of macro 'SYSCALL_DEFINE1' SYSCALL_DEFINE1(userfaultfd, int, flags) ^~~~~~~~~~~~~~~ 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:225:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ mm/userfaultfd.c:4475:1: note: in expansion of macro 'SYSCALL_DEFINE1' SYSCALL_DEFINE1(userfaultfd, int, flags) ^~~~~~~~~~~~~~~ vim +35 arch/riscv/include/asm/syscall_wrapper.h a9ad73295cc1e3a Sami Tolvanen 2024-03-11 16 a9ad73295cc1e3a Sami Tolvanen 2024-03-11 17 #define __SYSCALL_SE_DEFINEx(x, prefix, name, ...) \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 18 static long __se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 19 static long __se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) a9ad73295cc1e3a Sami Tolvanen 2024-03-11 20 08d0ce30e0e4fcb Sami Tolvanen 2023-07-10 21 #define SC_RISCV_REGS_TO_ARGS(x, ...) \ 08d0ce30e0e4fcb Sami Tolvanen 2023-07-10 22 __MAP(x,__SC_ARGS \ 08d0ce30e0e4fcb Sami Tolvanen 2023-07-10 23 ,,regs->orig_a0,,regs->a1,,regs->a2 \ 08d0ce30e0e4fcb Sami Tolvanen 2023-07-10 24 ,,regs->a3,,regs->a4,,regs->a5,,regs->a6) 08d0ce30e0e4fcb Sami Tolvanen 2023-07-10 25 a9ad73295cc1e3a Sami Tolvanen 2024-03-11 26 #else a9ad73295cc1e3a Sami Tolvanen 2024-03-11 27 /* a9ad73295cc1e3a Sami Tolvanen 2024-03-11 28 * Use type aliasing to ensure registers a0-a6 are correctly passed to the syscall a9ad73295cc1e3a Sami Tolvanen 2024-03-11 29 * implementation when >word-size arguments are used. a9ad73295cc1e3a Sami Tolvanen 2024-03-11 30 */ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 31 #define __SYSCALL_SE_DEFINEx(x, prefix, name, ...) \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 32 __diag_push(); \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 33 __diag_ignore(GCC, 8, "-Wattribute-alias", \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 34 "Type aliasing is used to sanitize syscall arguments"); \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 @35 static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 36 ulong) \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 37 __attribute__((alias(__stringify(___se_##prefix##name)))); \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 38 __diag_pop(); \ 653650c468be211 Sami Tolvanen 2024-03-26 39 static long noinline ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 653650c468be211 Sami Tolvanen 2024-03-26 40 __used; \ a9ad73295cc1e3a Sami Tolvanen 2024-03-11 41 static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) a9ad73295cc1e3a 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 :::::: CC: Palmer Dabbelt -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki