mm/sparse: add common helper to mark all memblocks present (9def36e0) · Commits · 戴 / test

Presently the arches arm64, arm and sh have a function which loops through each memblock and calls memory present. riscv will require a similar function. Introduce a common memblocks_present() function that can be used by all the arches. Subsequent patches will cleanup the arches that make use of this. Link: http://lkml.kernel.org/r/20181107205433.3875-3-logang@deltatee.com Signed-off-by:

Logan Gunthorpe <logang@deltatee.com> Acked-by:

Andrew Morton <akpm@linux-foundation.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Oscar Salvador <osalvador@suse.de> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

include/linux/mmzone.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -783,6 +783,12 @@ void memory_present(int nid, unsigned long start, unsigned long end);
		static inline void memory_present(int nid, unsigned long start, unsigned long end) {}
		#endif

		#if defined(CONFIG_SPARSEMEM)
		void memblocks_present(void);
		#else
		static inline void memblocks_present(void) {}
		#endif

		#ifdef CONFIG_HAVE_MEMORYLESS_NODES
		int local_memory_node(int node_id);
		#else

mm/sparse.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -239,6 +239,22 @@ void __init memory_present(int nid, unsigned long start, unsigned long end)
		}
		}

		/*
		* Mark all memblocks as present using memory_present(). This is a
		* convienence function that is useful for a number of arches
		* to mark all of the systems memory as present during initialization.
		*/
		void __init memblocks_present(void)
		{
		struct memblock_region *reg;

		for_each_memblock(memory, reg) {
		memory_present(memblock_get_region_node(reg),
		memblock_region_memory_base_pfn(reg),
		memblock_region_memory_end_pfn(reg));
		}
		}

		/*
		* Subtle, we encode the real pfn into the mem_map such that
		* the identity pfn - section_mem_map will return the actual

Admin message