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Subject[lpieralisi-pci:pci/qcom 4/6] include/linux/stddef.h:8:14: error: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git pci/qcom
head: bab406fc1147f27b9602d9e3c6d7a6edbee2ea16
commit: 64bb1ea81641fdcce4423e2672025e63ebe0bee4 [4/6] PCI: qcom: Replace ops with struct pcie_cfg in pcie match data
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc-linux-gcc (GCC) 11.2.0
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://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git/commit/?id=64bb1ea81641fdcce4423e2672025e63ebe0bee4
git remote add lpieralisi-pci https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/pci.git
git fetch --no-tags lpieralisi-pci pci/qcom
git checkout 64bb1ea81641fdcce4423e2672025e63ebe0bee4
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc

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 include/uapi/linux/posix_types.h:5,
from include/uapi/linux/types.h:14,
from include/linux/types.h:6,
from include/linux/kasan-checks.h:5,
from include/asm-generic/rwonce.h:26,
from ./arch/powerpc/include/generated/asm/rwonce.h:1,
from include/linux/compiler.h:266,
from include/linux/err.h:5,
from include/linux/clk.h:12,
from drivers/pci/controller/dwc/pcie-qcom.c:11:
drivers/pci/controller/dwc/pcie-qcom.c: In function 'qcom_pcie_probe':
>> include/linux/stddef.h:8:14: error: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast [-Werror=int-conversion]
8 | #define NULL ((void *)0)
| ^
drivers/pci/controller/dwc/pcie-qcom.c:1531:24: note: in expansion of macro 'NULL'
1531 | return NULL;
| ^~~~
cc1: all warnings being treated as errors


vim +8 include/linux/stddef.h

^1da177e4c3f41 Linus Torvalds 2005-04-16 6
^1da177e4c3f41 Linus Torvalds 2005-04-16 7 #undef NULL
^1da177e4c3f41 Linus Torvalds 2005-04-16 @8 #define NULL ((void *)0)
6e218287432472 Richard Knutsson 2006-09-30 9

:::::: The code at line 8 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

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