Hi David, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on linus/master v6.5-rc3 next-20230725] [cannot apply to next-20230725 hch-configfs/for-next] [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/David-Laight/minmax-Add-min_unsigned-a-b-and-max_unsigned-a-b/20230725-180332 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/454f967d452548a9acfa7c0a0872507e%40AcuMS.aculab.com patch subject: [PATCH next 2/5] minmax: Allow min()/max()/clamp() if the arguments have the same signedness. config: um-allnoconfig (https://download.01.org/0day-ci/archive/20230725/202307252359.Is4T2MXC-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20230725/202307252359.Is4T2MXC-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202307252359.Is4T2MXC-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from init/calibrate.c:8: >> include/linux/jiffies.h:427:28: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 427 | return jiffies_to_clock_t(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ In file included from init/calibrate.c:8: include/linux/jiffies.h:432:26: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 432 | return jiffies_to_msecs(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ 2 errors generated. -- In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:7: In file included from include/linux/ktime.h:25: >> include/linux/jiffies.h:427:28: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 427 | return jiffies_to_clock_t(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:7: In file included from include/linux/ktime.h:25: include/linux/jiffies.h:432:26: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 432 | return jiffies_to_msecs(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:10: In file included from include/linux/fs.h:33: In file included from include/linux/percpu-rwsem.h:7: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:6: include/linux/signal.h:97:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 97 | return (set->sig[3] | set->sig[2] | | ^ ~ arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here 24 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:10: In file included from include/linux/fs.h:33: In file included from include/linux/percpu-rwsem.h:7: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:6: include/linux/signal.h:97:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 97 | return (set->sig[3] | set->sig[2] | | ^ ~ arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here 24 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:10: In file included from include/linux/fs.h:33: In file included from include/linux/percpu-rwsem.h:7: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:6: include/linux/signal.h:98:4: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 98 | set->sig[1] | set->sig[0]) == 0; | ^ ~ arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here 24 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:10: In file included from include/linux/fs.h:33: In file included from include/linux/percpu-rwsem.h:7: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:6: include/linux/signal.h:100:11: warning: array index 1 is past the end of the array (that has type 'unsigned long[1]') [-Warray-bounds] 100 | return (set->sig[1] | set->sig[0]) == 0; | ^ ~ arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here 24 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:10: In file included from include/linux/fs.h:33: In file included from include/linux/percpu-rwsem.h:7: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:6: include/linux/signal.h:113:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds] 113 | return (set1->sig[3] == set2->sig[3]) && | ^ ~ arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here 24 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:10: In file included from include/linux/fs.h:33: In file included from include/linux/percpu-rwsem.h:7: In file included from include/linux/rcuwait.h:6: In file included from include/linux/sched/signal.h:6: include/linux/signal.h:113:27: warning: array index 3 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds] 113 | return (set1->sig[3] == set2->sig[3]) && | ^ ~ arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here 24 | unsigned long sig[_NSIG_WORDS]; | ^ In file included from fs/signalfd.c:22: In file included from include/linux/poll.h:10: -- In file included from kernel/irq/spurious.c:8: >> include/linux/jiffies.h:427:28: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 427 | return jiffies_to_clock_t(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ In file included from kernel/irq/spurious.c:8: include/linux/jiffies.h:432:26: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 432 | return jiffies_to_msecs(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ In file included from kernel/irq/spurious.c:9: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from kernel/irq/spurious.c:9: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from kernel/irq/spurious.c:9: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 692 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 700 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 708 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 717 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 726 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 735 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ 12 warnings and 2 errors generated. -- In file included from kernel/time/alarmtimer.c:16: In file included from include/linux/hrtimer.h:15: In file included from include/linux/hrtimer_defs.h:5: In file included from include/linux/ktime.h:25: >> include/linux/jiffies.h:427:28: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 427 | return jiffies_to_clock_t(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ In file included from kernel/time/alarmtimer.c:16: In file included from include/linux/hrtimer.h:15: In file included from include/linux/hrtimer_defs.h:5: In file included from include/linux/ktime.h:25: include/linux/jiffies.h:432:26: error: call to undeclared function 'static_assert'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 432 | return jiffies_to_msecs(max(0L, delta)); | ^ include/linux/minmax.h:69:19: note: expanded from macro 'max' 69 | #define max(x, y) __careful_cmp(max, x, y) | ^ include/linux/minmax.h:36:3: note: expanded from macro '__careful_cmp' 36 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^ include/linux/minmax.h:29:3: note: expanded from macro '__cmp_once' 29 | static_assert(__types_ok(x, y), \ | ^ In file included from kernel/time/alarmtimer.c:18: In file included from include/linux/rtc.h:17: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from kernel/time/alarmtimer.c:18: In file included from include/linux/rtc.h:17: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from kernel/time/alarmtimer.c:18: In file included from include/linux/rtc.h:17: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 692 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 700 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 708 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 717 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 726 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 735 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ In file included from kernel/time/alarmtimer.c:18: In file included from include/linux/rtc.h:38: In file included from include/linux/seq_file.h:12: In file included from include/linux/fs.h:33: vim +/static_assert +427 include/linux/jiffies.h ae60d6a0e3a919 Nicholas Mc Guire 2015-05-28 420 9ca308506062fc Baolin Wang 2015-07-29 421 extern unsigned long timespec64_to_jiffies(const struct timespec64 *value); 9ca308506062fc Baolin Wang 2015-07-29 422 extern void jiffies_to_timespec64(const unsigned long jiffies, 9ca308506062fc Baolin Wang 2015-07-29 423 struct timespec64 *value); cbbc719fccdb8c hank 2011-09-20 424 extern clock_t jiffies_to_clock_t(unsigned long x); a399a8053164ec Eric Dumazet 2012-08-08 425 static inline clock_t jiffies_delta_to_clock_t(long delta) a399a8053164ec Eric Dumazet 2012-08-08 426 { a399a8053164ec Eric Dumazet 2012-08-08 @427 return jiffies_to_clock_t(max(0L, delta)); a399a8053164ec Eric Dumazet 2012-08-08 428 } a399a8053164ec Eric Dumazet 2012-08-08 429 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
