tree 0033042fe9ff030817fdc005d6788e2ba25e8a3b
parent 203e6e5ca4eac64c8909debfd64aae3fd62b2a16
author Miaohe Lin <linmiaohe@huawei.com> 1602976443 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1603038429 -0700

mm/migrate: avoid possible unnecessary process right check in kernel_move_pages()

There is no need to check if this process has the right to modify the
specified process when they are same.  And we could also skip the security
hook call if a process is modifying its own pages.  Add helper function to
handle these.

Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Hongxiang Lou <louhongxiang@huawei.com>
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christopher Lameter <cl@linux.com>
Link: https://lkml.kernel.org/r/20200819083331.19012-1-linmiaohe@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>