mm/mlock.c: change can_do_mlock return value type to boolean
Since can_do_mlock only return 1 or 0, so make it boolean. No functional change. [akpm@linux-foundation.org: update declaration in mm.h] Signed-off-by: Wang Xiaoqiang <wangxq10@lzu.edu.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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