memblock: Implement for_each_free_mem_range()
Implement for_each_free_mem_range() which iterates over free memory areas according to memblock (memory && !reserved). This will be used to simplify memblock users. Signed-off-by: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/1310462166-31469-7-git-send-email-tj@kernel.org Cc: Yinghai Lu <yinghai@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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