mm: change type of cma_area_count to unsigned int
Prefer 'unsigned int' over plain 'unsigned'. Also make it
consistent with mm/cma.c
Link: https://lkml.kernel.org/r/tencent_1E5E3AA25C261196D8C1F7097F130E382008@qq.com
Signed-off-by: Jiale Yang <295107659@qq.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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