5:18 a.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
linux-5.13.y-rt-testing
head: 87ca00748cfcc19b46d4622228d2e0e8514d5033
commit: f2f9e496208c584356e84e720a3dfd99970ee5e9 [207/228] x86: Support for lazy
preemption
config: s390-buildonly-randconfig-r005-20210712 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
8d69635ed9ecf36fd0ca85906bfde17949671cbe)
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/rt/linux-rt-devel.git/com...
git remote add linux-rt-devel
https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
git fetch --no-tags linux-rt-devel linux-5.13.y-rt-testing
git checkout f2f9e496208c584356e84e720a3dfd99970ee5e9
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=s390
SHELL=/bin/bash kernel/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Note: the linux-rt-devel/linux-5.13.y-rt-testing HEAD
87ca00748cfcc19b46d4622228d2e0e8514d5033 builds fine.
It only hurts bisectibility.
All errors (new ones prefixed by >>):
In file included from kernel/entry/common.c:4:
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:25:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
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 kernel/entry/common.c:4:
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:25:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
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 kernel/entry/common.c:4:
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:25:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
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);
~~~~~~~~~~ ^
> kernel/entry/common.c:158:19: error: use of undeclared identifier
'_TIF_NEED_RESCHED_MASK'
while (ti_work &
EXIT_TO_USER_MODE_WORK) {
^
include/linux/entry-common.h:62:3: note: expanded from macro
'EXIT_TO_USER_MODE_WORK'
_TIF_NEED_RESCHED_MASK | _TIF_PATCH_PENDING | _TIF_NOTIFY_SIGNAL | \
^
kernel/entry/common.c:162:17: error: use of undeclared identifier
'_TIF_NEED_RESCHED_MASK'
if (ti_work & _TIF_NEED_RESCHED_MASK)
^
kernel/entry/common.c:216:25: error: use of undeclared identifier
'_TIF_NEED_RESCHED_MASK'
if (unlikely(ti_work & EXIT_TO_USER_MODE_WORK))
^
include/linux/entry-common.h:62:3: note: expanded from macro
'EXIT_TO_USER_MODE_WORK'
_TIF_NEED_RESCHED_MASK | _TIF_PATCH_PENDING | _TIF_NOTIFY_SIGNAL | \
^
12 warnings and 3 errors generated.
vim +/_TIF_NEED_RESCHED_MASK +158 kernel/entry/common.c
a9f3a74a29af09 Thomas Gleixner 2020-07-22 150
a9f3a74a29af09 Thomas Gleixner 2020-07-22 151 static unsigned long
exit_to_user_mode_loop(struct pt_regs *regs,
a9f3a74a29af09 Thomas Gleixner 2020-07-22 152 unsigned long ti_work)
a9f3a74a29af09 Thomas Gleixner 2020-07-22 153 {
a9f3a74a29af09 Thomas Gleixner 2020-07-22 154 /*
a9f3a74a29af09 Thomas Gleixner 2020-07-22 155 * Before returning to user space ensure
that all pending work
a9f3a74a29af09 Thomas Gleixner 2020-07-22 156 * items have been completed.
a9f3a74a29af09 Thomas Gleixner 2020-07-22 157 */
a9f3a74a29af09 Thomas Gleixner 2020-07-22 @158 while (ti_work &
EXIT_TO_USER_MODE_WORK) {
a9f3a74a29af09 Thomas Gleixner 2020-07-22 159
a9f3a74a29af09 Thomas Gleixner 2020-07-22 160 local_irq_enable_exit_to_user(ti_work);
a9f3a74a29af09 Thomas Gleixner 2020-07-22 161
f2f9e496208c58 Thomas Gleixner 2012-11-01 162 if (ti_work &
_TIF_NEED_RESCHED_MASK)
a9f3a74a29af09 Thomas Gleixner 2020-07-22 163 schedule();
a9f3a74a29af09 Thomas Gleixner 2020-07-22 164
:::::: The code at line 158 was first introduced by commit
:::::: a9f3a74a29af095f3e1b89e9176f8127912ae0f0 entry: Provide generic syscall exit
function
:::::: TO: Thomas Gleixner <tglx(a)linutronix.de>
:::::: CC: Thomas Gleixner <tglx(a)linutronix.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org