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SubjectRe: [PATCH] uprobes: wait for mmap_sem for write killable
Hi Michal,

[auto build test ERROR on tip/perf/core]
[also build test ERROR on v4.5-rc6 next-20160229]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url: https://github.com/0day-ci/linux/commits/Michal-Hocko/uprobes-wait-for-mmap_sem-for-write-killable/20160301-014513
config: x86_64-randconfig-x019-201609 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

kernel/events/uprobes.c: In function 'xol_add_vma':
kernel/events/uprobes.c:1133:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
if (down_write_killable(&mm->mmap_sem))
^
kernel/events/uprobes.c: In function 'dup_xol_work':
>> kernel/events/uprobes.c:1475:3: error: expected ')' before 'uprobe_warn'
uprobe_warn(current, "dup xol area");
^
>> kernel/events/uprobes.c:1476:1: error: expected expression before '}' token
}
^
cc1: some warnings being treated as errors

vim +1475 kernel/events/uprobes.c

aa59c53f Oleg Nesterov 2013-10-13 1469 {
aa59c53f Oleg Nesterov 2013-10-13 1470 if (current->flags & PF_EXITING)
aa59c53f Oleg Nesterov 2013-10-13 1471 return;
aa59c53f Oleg Nesterov 2013-10-13 1472
6b584cb3 Michal Hocko 2016-02-29 1473 if (!__create_xol_area(current->utask->dup_xol_addr) &&
6b584cb3 Michal Hocko 2016-02-29 1474 !fatal_signal_pending(current)
aa59c53f Oleg Nesterov 2013-10-13 @1475 uprobe_warn(current, "dup xol area");
aa59c53f Oleg Nesterov 2013-10-13 @1476 }
aa59c53f Oleg Nesterov 2013-10-13 1477
e78aebfd Anton Arapov 2013-04-03 1478 /*
b68e0749 Oleg Nesterov 2013-10-13 1479 * Called in context of a new clone/fork from copy_process.

:::::: The code at line 1475 was first introduced by commit
:::::: aa59c53fd4599c91ccf9629af0c2777b89929076 uprobes: Change uprobe_copy_process() to dup xol_area

:::::: TO: Oleg Nesterov <oleg@redhat.com>
:::::: CC: Oleg Nesterov <oleg@redhat.com>

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