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SubjectRe: [PATCHv2 2/5] x86/mm: introduce mmap_{,legacy}_base
Hi Dmitry,

[auto build test ERROR on tip/x86/core]
[also build test ERROR on v4.10-rc4 next-20170116]
[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/Dmitry-Safonov/Fix-compatible-mmap-return-pointer-over-4Gb/20170116-204523
config: i386-randconfig-i1-201703 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

mm/mmap.c: In function 'arch_get_unmapped_area_topdown':
>> mm/mmap.c:2039:20: error: 'TASK_UNMAPPED_BASE' undeclared (first use in this function)
info.low_limit = TASK_UNMAPPED_BASE;
^
mm/mmap.c:2039:20: note: each undeclared identifier is reported only once for each function it appears in

vim +/TASK_UNMAPPED_BASE +2039 mm/mmap.c

^1da177e Linus Torvalds 2005-04-16 2033 * can happen with large stack limits and large mmap()
^1da177e Linus Torvalds 2005-04-16 2034 * allocations.
^1da177e Linus Torvalds 2005-04-16 2035 */
de1741a1 Alexander Kuleshov 2015-11-05 2036 if (offset_in_page(addr)) {
db4fbfb9 Michel Lespinasse 2012-12-11 2037 VM_BUG_ON(addr != -ENOMEM);
db4fbfb9 Michel Lespinasse 2012-12-11 2038 info.flags = 0;
db4fbfb9 Michel Lespinasse 2012-12-11 @2039 info.low_limit = TASK_UNMAPPED_BASE;
db4fbfb9 Michel Lespinasse 2012-12-11 2040 info.high_limit = TASK_SIZE;
db4fbfb9 Michel Lespinasse 2012-12-11 2041 addr = vm_unmapped_area(&info);
db4fbfb9 Michel Lespinasse 2012-12-11 2042 }

:::::: The code at line 2039 was first introduced by commit
:::::: db4fbfb9523c93583c339e66023506f651c1d54b mm: vm_unmapped_area() lookup function

:::::: TO: Michel Lespinasse <walken@google.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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