mm: use dedicated helper to access rlimit value
Use rlimit() helper instead of manually writing whole chain from current task to rlim_cur. Link: http://lkml.kernel.org/r/20170705172811.8027-1-k.opasiak@samsung.comSigned-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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