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SubjectRe: [PATCHv2 3/5] x86/mm: fix native mmap() in compat bins and vice-versa
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]

config: x86_64-randconfig-x001-201703 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

arch/x86/kernel/sys_x86_64.c: In function 'find_start_end':
>> arch/x86/kernel/sys_x86_64.c:122:7: error: implicit declaration of function 'in_compat_syscall' [-Werror=implicit-function-declaration]
if (in_compat_syscall()) {
cc1: some warnings being treated as errors

vim +/in_compat_syscall +122 arch/x86/kernel/sys_x86_64.c

116 return;
117 }
119 if (!test_thread_flag(TIF_ADDR32)) {
120 #ifdef CONFIG_COMPAT
121 /* 64-bit native binary doing compat 32-bit syscall */
> 122 if (in_compat_syscall()) {
123 *begin = mmap_legacy_base(arch_compat_rnd(),
125 *end = IA32_PAGE_OFFSET;

0-DAY kernel test infrastructure Open Source Technology Center Intel Corporation
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