Hi Al, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git untested-uaccess head: e4c5cc79ec8eab6bc3e74d9994b33f368f137223 commit: 5e50940a5bad868daf05d8bb5027cb0ef0f4cc87 [32/79] ia64: add extable.h config: ia64-allyesconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 5e50940a5bad868daf05d8bb5027cb0ef0f4cc87 # save the attached .config to linux build tree make.cross ARCH=ia64 All errors (new ones prefixed by >>): arch/ia64/mm/extable.c: In function 'ia64_handle_exception': >> arch/ia64/mm/extable.c:16:14: error: 'EFAULT' undeclared (first use in this function) regs->r8 = -EFAULT; ^~~~~~ arch/ia64/mm/extable.c:16:14: note: each undeclared identifier is reported only once for each function it appears in >> arch/ia64/mm/extable.c:20:16: error: dereferencing pointer to incomplete type 'struct ia64_psr' ia64_psr(regs)->ri = fix & 0x3; /* set continuation slot number */ ^~ vim +/EFAULT +16 arch/ia64/mm/extable.c ^1da177e Linus Torvalds 2005-04-16 10 ^1da177e Linus Torvalds 2005-04-16 11 void ^1da177e Linus Torvalds 2005-04-16 12 ia64_handle_exception (struct pt_regs *regs, const struct exception_table_entry *e) ^1da177e Linus Torvalds 2005-04-16 13 { 8fe9752e Ard Biesheuvel 2016-03-22 14 long fix = (u64) &e->fixup + e->fixup; ^1da177e Linus Torvalds 2005-04-16 15 ^1da177e Linus Torvalds 2005-04-16 @16 regs->r8 = -EFAULT; ^1da177e Linus Torvalds 2005-04-16 17 if (fix & 4) ^1da177e Linus Torvalds 2005-04-16 18 regs->r9 = 0; ^1da177e Linus Torvalds 2005-04-16 19 regs->cr_iip = fix & ~0xf; ^1da177e Linus Torvalds 2005-04-16 @20 ia64_psr(regs)->ri = fix & 0x3; /* set continuation slot number */ ^1da177e Linus Torvalds 2005-04-16 21 } :::::: The code at line 16 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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