* [luto:x86/kentry 5/10] arch/s390/kernel/process.c:61:2: error: implicit declaration of function 'syscall_exit_to_user_mode'
@ 2021-03-21 1:14 kernel test robot
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From: kernel test robot @ 2021-03-21 1:14 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/kentry
head: b0d7a5e5a9b11a6ddb50b90e31877e3cb1f93362
commit: d37c90c782b1cca1fc4f936480dd01dda7f72a88 [5/10] kentry: Simplify the common syscall API
config: s390-randconfig-r011-20210321 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 14696baaf4c43fe53f738bc292bbe169eed93d5d)
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 s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/commit/?id=d37c90c782b1cca1fc4f936480dd01dda7f72a88
git remote add luto https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git
git fetch --no-tags luto x86/kentry
git checkout d37c90c782b1cca1fc4f936480dd01dda7f72a88
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from arch/s390/kernel/process.c:24:
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:21:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from arch/s390/kernel/process.c:24:
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:21:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from arch/s390/kernel/process.c:24:
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:21:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> arch/s390/kernel/process.c:61:2: error: implicit declaration of function 'syscall_exit_to_user_mode' [-Werror,-Wimplicit-function-declaration]
syscall_exit_to_user_mode(regs);
^
arch/s390/kernel/process.c:61:2: note: did you mean 'arch_exit_to_user_mode'?
include/linux/entry-common.h:232:29: note: 'arch_exit_to_user_mode' declared here
static __always_inline void arch_exit_to_user_mode(void);
^
arch/s390/include/asm/entry-common.h:53:32: note: expanded from macro 'arch_exit_to_user_mode'
#define arch_exit_to_user_mode arch_exit_to_user_mode
^
12 warnings and 1 error generated.
--
In file included from arch/s390/kernel/syscall.c:34:
In file included from include/linux/entry-common.h:6:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from arch/s390/kernel/syscall.c:34:
In file included from include/linux/entry-common.h:6:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from arch/s390/kernel/syscall.c:34:
In file included from include/linux/entry-common.h:6:
In file included from include/linux/tracehook.h:50:
In file included from include/linux/memcontrol.h:22:
In file included from include/linux/writeback.h:14:
In file included from include/linux/blk-cgroup.h:23:
In file included from include/linux/blkdev.h:26:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:80:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> arch/s390/kernel/syscall.c:124:7: error: implicit declaration of function 'syscall_enter_from_user_mode_work' [-Werror,-Wimplicit-function-declaration]
nr = syscall_enter_from_user_mode_work(regs, nr);
^
>> arch/s390/kernel/syscall.c:140:2: error: implicit declaration of function 'syscall_exit_to_user_mode_work' [-Werror,-Wimplicit-function-declaration]
syscall_exit_to_user_mode_work(regs);
^
arch/s390/kernel/syscall.c:140:2: note: did you mean 'arch_exit_to_user_mode_work'?
include/linux/entry-common.h:190:20: note: 'arch_exit_to_user_mode_work' declared here
static inline void arch_exit_to_user_mode_work(struct pt_regs *regs,
^
arch/s390/include/asm/entry-common.h:42:37: note: expanded from macro 'arch_exit_to_user_mode_work'
#define arch_exit_to_user_mode_work arch_exit_to_user_mode_work
^
12 warnings and 2 errors generated.
vim +/syscall_exit_to_user_mode +61 arch/s390/kernel/process.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 48
56e62a73702836 Sven Schnelle 2020-11-21 49 void __ret_from_fork(struct task_struct *prev, struct pt_regs *regs)
56e62a73702836 Sven Schnelle 2020-11-21 50 {
56e62a73702836 Sven Schnelle 2020-11-21 51 void (*func)(void *arg);
56e62a73702836 Sven Schnelle 2020-11-21 52
56e62a73702836 Sven Schnelle 2020-11-21 53 schedule_tail(prev);
56e62a73702836 Sven Schnelle 2020-11-21 54
56e62a73702836 Sven Schnelle 2020-11-21 55 if (!user_mode(regs)) {
56e62a73702836 Sven Schnelle 2020-11-21 56 /* Kernel thread */
56e62a73702836 Sven Schnelle 2020-11-21 57 func = (void *)regs->gprs[9];
56e62a73702836 Sven Schnelle 2020-11-21 58 func((void *)regs->gprs[10]);
56e62a73702836 Sven Schnelle 2020-11-21 59 }
56e62a73702836 Sven Schnelle 2020-11-21 60 clear_pt_regs_flag(regs, PIF_SYSCALL);
56e62a73702836 Sven Schnelle 2020-11-21 @61 syscall_exit_to_user_mode(regs);
56e62a73702836 Sven Schnelle 2020-11-21 62 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 63
:::::: The code at line 61 was first introduced by commit
:::::: 56e62a73702836017564eaacd5212e4d0fa1c01d s390: convert to generic entry
:::::: TO: Sven Schnelle <svens@linux.ibm.com>
:::::: CC: Vasily Gorbik <gor@linux.ibm.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2021-03-21 1:14 [luto:x86/kentry 5/10] arch/s390/kernel/process.c:61:2: error: implicit declaration of function 'syscall_exit_to_user_mode' kernel test robot
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