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authorAndrea Arcangeli <aarcange@redhat.com>2017-02-23 02:42:37 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-23 03:41:28 +0300
commit90794bf19dc19691a16b71bcd75c04094d9e392d (patch)
tree96c80c3f2d4b0aa5b72ab5965269e7050fec4185 /mm/mremap.c
parent72f87654c69690ff4721bd9b4a39983f971de9a5 (diff)
downloadlinux-90794bf19dc19691a16b71bcd75c04094d9e392d.tar.xz
userfaultfd: non-cooperative: optimize mremap_userfaultfd_complete()
Optimize the mremap_userfaultfd_complete() interface to pass only the vm_userfaultfd_ctx pointer through the stack as a microoptimization. Link: http://lkml.kernel.org/r/20161216144821.5183-13-aarcange@redhat.com Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Reported-by: Hillf Danton <hillf.zj@alibaba-inc.com> Acked-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Cc: Michael Rapoport <RAPOPORT@il.ibm.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mremap.c')
-rw-r--r--mm/mremap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mremap.c b/mm/mremap.c
index 504b560c013c..8779928d6a70 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -608,6 +608,6 @@ out:
up_write(&current->mm->mmap_sem);
if (locked && new_len > old_len)
mm_populate(new_addr + old_len, new_len - old_len);
- mremap_userfaultfd_complete(uf, addr, new_addr, old_len);
+ mremap_userfaultfd_complete(&uf, addr, new_addr, old_len);
return ret;
}