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SubjectRe: [PATCH 5/6] powerpc: Implement DISCONTIGMEM and allow selection on PPC32
Hi Jonathan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.16-rc2 next-20180220]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Jonathan-Neusch-fer/DISCONTIGMEM-support-for-PPC32/20180221-044840
base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=powerpc

All errors (new ones prefixed by >>):

In file included from include/linux/gfp.h:6:0,
from include/linux/mm.h:10,
from include/linux/mman.h:5,
from arch/powerpc/kernel/asm-offsets.c:22:
>> include/linux/mmzone.h:1239:19: error: conflicting types for 'pfn_valid'
static inline int pfn_valid(unsigned long pfn)
^~~~~~~~~
In file included from include/linux/mmzone.h:912:0,
from include/linux/gfp.h:6,
from include/linux/mm.h:10,
from include/linux/mman.h:5,
from arch/powerpc/kernel/asm-offsets.c:22:
arch/powerpc/include/asm/mmzone.h:40:19: note: previous definition of 'pfn_valid' was here
static inline int pfn_valid(int pfn)
^~~~~~~~~
make[2]: *** [arch/powerpc/kernel/asm-offsets.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [sub-make] Error 2

vim +/pfn_valid +1239 include/linux/mmzone.h

c4e1be9e Dave Hansen 2017-07-06 1237
7b7bf499 Will Deacon 2011-05-19 1238 #ifndef CONFIG_HAVE_ARCH_PFN_VALID
d41dee36 Andy Whitcroft 2005-06-23 @1239 static inline int pfn_valid(unsigned long pfn)
d41dee36 Andy Whitcroft 2005-06-23 1240 {
d41dee36 Andy Whitcroft 2005-06-23 1241 if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
d41dee36 Andy Whitcroft 2005-06-23 1242 return 0;
29751f69 Andy Whitcroft 2005-06-23 1243 return valid_section(__nr_to_section(pfn_to_section_nr(pfn)));
d41dee36 Andy Whitcroft 2005-06-23 1244 }
7b7bf499 Will Deacon 2011-05-19 1245 #endif
d41dee36 Andy Whitcroft 2005-06-23 1246

:::::: The code at line 1239 was first introduced by commit
:::::: d41dee369bff3b9dcb6328d4d822926c28cc2594 [PATCH] sparsemem memory model

:::::: TO: Andy Whitcroft <apw@shadowen.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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