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userfaultfd: non-cooperative: optimize mremap_userfaultfd_complete()

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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/[email protected]
Signed-off-by: Andrea Arcangeli <[email protected]>
Reported-by: Hillf Danton <[email protected]>
Acked-by: Mike Rapoport <[email protected]>
Cc: "Dr. David Alan Gilbert" <[email protected]>
Cc: Michael Rapoport <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrea Arcangeli 2017-02-22 15:42:37 -08:00 • committed by Linus Torvalds
commit 90794bf19d
3 changed files with 5 additions and 5 deletions
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2
mm/mremap.c
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@ -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;
}