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SubjectRe: [PATCH v3 3/6] uapi: futex: Add a futex syscall
Hi Alistair,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/locking/core]
[also build test ERROR on linux/master soc/for-next linus/master v5.16-rc2 next-20211126]
[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]

url: https://github.com/0day-ci/linux/commits/Alistair-Francis/perf-bench-futex-Add-support-for-32-bit-systems-with-64-bit-time_t/20211126-140752
base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 3297481d688a5cc2973ea58bd78e66b8639748b1
config: x86_64-randconfig-a002-20211126 (https://download.01.org/0day-ci/archive/20211127/202111271634.gZ4ePXuJ-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5162b558d8c0b542e752b037e72a69d5fd51eb1e)
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
# https://github.com/0day-ci/linux/commit/e6bfd30ff20551d613ea63d17bc9667179a593de
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Alistair-Francis/perf-bench-futex-Add-support-for-32-bit-systems-with-64-bit-time_t/20211126-140752
git checkout e6bfd30ff20551d613ea63d17bc9667179a593de
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All error/warnings (new ones prefixed by >>):

In file included from <built-in>:1:
>> ./usr/include/linux/futex_syscall.h:30:16: warning: declaration of 'struct timespec' will not be visible outside of this function [-Wvisibility]
struct timespec *timeout, __volatile__ uint32_t *uaddr2, int val3)
^
>> ./usr/include/linux/futex_syscall.h:42:12: error: invalid application of 'sizeof' to an incomplete type 'struct timespec'
if (sizeof(*timeout) == sizeof(struct __kernel_old_timespec))
^~~~~~~~~~
./usr/include/linux/futex_syscall.h:30:16: note: forward declaration of 'struct timespec'
struct timespec *timeout, __volatile__ uint32_t *uaddr2, int val3)
^
>> ./usr/include/linux/futex_syscall.h:43:10: error: implicit declaration of function 'syscall' [-Werror,-Wimplicit-function-declaration]
return syscall(__NR_futex, uaddr, op, val, timeout, uaddr2, val3);
^
>> ./usr/include/linux/futex_syscall.h:45:24: error: incomplete definition of type 'struct timespec'
if (timeout && timeout->tv_sec == (long)timeout->tv_sec) {
~~~~~~~^
./usr/include/linux/futex_syscall.h:30:16: note: forward declaration of 'struct timespec'
struct timespec *timeout, __volatile__ uint32_t *uaddr2, int val3)
^
./usr/include/linux/futex_syscall.h:45:49: error: incomplete definition of type 'struct timespec'
if (timeout && timeout->tv_sec == (long)timeout->tv_sec) {
~~~~~~~^
./usr/include/linux/futex_syscall.h:30:16: note: forward declaration of 'struct timespec'
struct timespec *timeout, __volatile__ uint32_t *uaddr2, int val3)
^
./usr/include/linux/futex_syscall.h:48:44: error: incomplete definition of type 'struct timespec'
ts_old.tv_sec = (__kernel_long_t) timeout->tv_sec;
~~~~~~~^
./usr/include/linux/futex_syscall.h:30:16: note: forward declaration of 'struct timespec'
struct timespec *timeout, __volatile__ uint32_t *uaddr2, int val3)
^
./usr/include/linux/futex_syscall.h:49:45: error: incomplete definition of type 'struct timespec'
ts_old.tv_nsec = (__kernel_long_t) timeout->tv_nsec;
~~~~~~~^
./usr/include/linux/futex_syscall.h:30:16: note: forward declaration of 'struct timespec'
struct timespec *timeout, __volatile__ uint32_t *uaddr2, int val3)
^
./usr/include/linux/futex_syscall.h:53:46: error: use of undeclared identifier 'NULL'
return syscall(__NR_futex, uaddr, op, val, NULL, uaddr2, val3);
^
./usr/include/linux/futex_syscall.h:82:9: error: implicit declaration of function 'syscall' [-Werror,-Wimplicit-function-declaration]
return syscall(__NR_futex, uaddr, op, val, nr_requeue, uaddr2, val3);
^
1 warning and 8 errors generated.

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

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