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| author | Jens Axboe <axboe@fb.com> | 2014-04-15 14:02:24 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-04-15 14:02:24 -0600 |
| commit | f89e0dd9d1a72fdf6b8958bcadfa6abf84f3cae0 (patch) | |
| tree | 6d4ca8c67dc22d1c81053392078588f9ab3804b5 /kernel/sys.c | |
| parent | 21f9fcd81593e201172160853b8647336fb81f4f (diff) | |
| parent | c9eaa447e77efe77b7fa4c953bd62de8297fd6c5 (diff) | |
Merge tag 'v3.15-rc1' into for-3.16/core
We don't like this, but things have diverged with the blk-mq fixes
in 3.15-rc1. So merge it in.
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index adaeab6f7a87..fba0f29401ea 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1996,6 +1996,21 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, if (arg2 || arg3 || arg4 || arg5) return -EINVAL; return current->no_new_privs ? 1 : 0; + case PR_GET_THP_DISABLE: + if (arg2 || arg3 || arg4 || arg5) + return -EINVAL; + error = !!(me->mm->def_flags & VM_NOHUGEPAGE); + break; + case PR_SET_THP_DISABLE: + if (arg3 || arg4 || arg5) + return -EINVAL; + down_write(&me->mm->mmap_sem); + if (arg2) + me->mm->def_flags |= VM_NOHUGEPAGE; + else + me->mm->def_flags &= ~VM_NOHUGEPAGE; + up_write(&me->mm->mmap_sem); + break; default: error = -EINVAL; break; |