[tip:smp/urgent 1/1] kernel/cpu.c:1353:2: error: implicit declaration of function 'cpu_up_down_serialize_trainwrecks'

From: kernel test robot
Date: Sat Jun 19 2021 - 20:26:16 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git smp/urgent
head: 64c71be97c02c3d3f24dea7c290912ad300538b9
commit: 64c71be97c02c3d3f24dea7c290912ad300538b9 [1/1] cpu/hotplug: Cure the cpusets trainwreck
config: riscv-randconfig-r031-20210620 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d1baf2895467735ab14f4b3415fce204c0cc8e7f)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=64c71be97c02c3d3f24dea7c290912ad300538b9
git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
git fetch --no-tags tip smp/urgent
git checkout 64c71be97c02c3d3f24dea7c290912ad300538b9
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:556:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return inb(addr);
^~~~~~~~~
arch/riscv/include/asm/io.h:55:76: note: expanded from macro 'inb'
#define inb(c) ({ u8 __v; __io_pbr(); __v = readb_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:87:48: note: expanded from macro 'readb_cpu'
#define readb_cpu(c) ({ u8 __r = __raw_readb(c); __r; })
^
In file included from kernel/cpu.c:13:
In file included from include/linux/sched/isolation.h:6:
In file included from include/linux/tick.h:8:
In file included from include/linux/clockchips.h:14:
In file included from include/linux/clocksource.h:22:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:564:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return inw(addr);
^~~~~~~~~
arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw'
#define inw(c) ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu'
#define readw_cpu(c) ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; })
^
include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from kernel/cpu.c:13:
In file included from include/linux/sched/isolation.h:6:
In file included from include/linux/tick.h:8:
In file included from include/linux/clockchips.h:14:
In file included from include/linux/clocksource.h:22:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return inl(addr);
^~~~~~~~~
arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl'
#define inl(c) ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu'
#define readl_cpu(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from kernel/cpu.c:13:
In file included from include/linux/sched/isolation.h:6:
In file included from include/linux/tick.h:8:
In file included from include/linux/clockchips.h:14:
In file included from include/linux/clocksource.h:22:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outb(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb'
#define outb(v,c) ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu'
#define writeb_cpu(v, c) ((void)__raw_writeb((v), (c)))
^
In file included from kernel/cpu.c:13:
In file included from include/linux/sched/isolation.h:6:
In file included from include/linux/tick.h:8:
In file included from include/linux/clockchips.h:14:
In file included from include/linux/clocksource.h:22:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outw(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
#define outw(v,c) ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
#define writew_cpu(v, c) ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
^
In file included from kernel/cpu.c:13:
In file included from include/linux/sched/isolation.h:6:
In file included from include/linux/tick.h:8:
In file included from include/linux/clockchips.h:14:
In file included from include/linux/clocksource.h:22:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outl(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl'
#define outl(v,c) ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu'
#define writel_cpu(v, c) ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
^
In file included from kernel/cpu.c:13:
In file included from include/linux/sched/isolation.h:6:
In file included from include/linux/tick.h:8:
In file included from include/linux/clockchips.h:14:
In file included from include/linux/clocksource.h:22:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> kernel/cpu.c:1353:2: error: implicit declaration of function 'cpu_up_down_serialize_trainwrecks' [-Werror,-Wimplicit-function-declaration]
cpu_up_down_serialize_trainwrecks(tasks_frozen);
^
7 warnings and 1 error generated.

Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for LOCKDEP
Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
Selected by
- PROVE_LOCKING && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
- LOCK_STAT && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
- DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT


vim +/cpu_up_down_serialize_trainwrecks +1353 kernel/cpu.c

1295
1296 /* Requires cpu_add_remove_lock to be held */
1297 static int _cpu_up(unsigned int cpu, int tasks_frozen, enum cpuhp_state target)
1298 {
1299 struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu);
1300 struct task_struct *idle;
1301 int ret = 0;
1302
1303 cpus_write_lock();
1304
1305 if (!cpu_present(cpu)) {
1306 ret = -EINVAL;
1307 goto out;
1308 }
1309
1310 /*
1311 * The caller of cpu_up() might have raced with another
1312 * caller. Nothing to do.
1313 */
1314 if (st->state >= target)
1315 goto out;
1316
1317 if (st->state == CPUHP_OFFLINE) {
1318 /* Let it fail before we try to bring the cpu up */
1319 idle = idle_thread_get(cpu);
1320 if (IS_ERR(idle)) {
1321 ret = PTR_ERR(idle);
1322 goto out;
1323 }
1324 }
1325
1326 cpuhp_tasks_frozen = tasks_frozen;
1327
1328 cpuhp_set_state(st, target);
1329 /*
1330 * If the current CPU state is in the range of the AP hotplug thread,
1331 * then we need to kick the thread once more.
1332 */
1333 if (st->state > CPUHP_BRINGUP_CPU) {
1334 ret = cpuhp_kick_ap_work(cpu);
1335 /*
1336 * The AP side has done the error rollback already. Just
1337 * return the error code..
1338 */
1339 if (ret)
1340 goto out;
1341 }
1342
1343 /*
1344 * Try to reach the target state. We max out on the BP at
1345 * CPUHP_BRINGUP_CPU. After that the AP hotplug thread is
1346 * responsible for bringing it up to the target state.
1347 */
1348 target = min((int)target, CPUHP_BRINGUP_CPU);
1349 ret = cpuhp_up_callbacks(cpu, st, target);
1350 out:
1351 cpus_write_unlock();
1352 arch_smt_update();
> 1353 cpu_up_down_serialize_trainwrecks(tasks_frozen);
1354 return ret;
1355 }
1356

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip