sparse.c (0ea8a56de21be24cb79abb03dee79aabcd60a316) sparse.c (c9118e6c37bff9ade90b638207a6e0db676ee6a9)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * sparse memory mappings.
4 */
5#include <linux/mm.h>
6#include <linux/slab.h>
7#include <linux/mmzone.h>
8#include <linux/memblock.h>

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286
287/*
288 * Mark all memblocks as present using memory_present().
289 * This is a convenience function that is useful to mark all of the systems
290 * memory as present during initialization.
291 */
292static void __init memblocks_present(void)
293{
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * sparse memory mappings.
4 */
5#include <linux/mm.h>
6#include <linux/slab.h>
7#include <linux/mmzone.h>
8#include <linux/memblock.h>

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286
287/*
288 * Mark all memblocks as present using memory_present().
289 * This is a convenience function that is useful to mark all of the systems
290 * memory as present during initialization.
291 */
292static void __init memblocks_present(void)
293{
294 struct memblock_region *reg;
294 unsigned long start, end;
295 int i, nid;
295
296
296 for_each_memblock(memory, reg) {
297 memory_present(memblock_get_region_node(reg),
298 memblock_region_memory_base_pfn(reg),
299 memblock_region_memory_end_pfn(reg));
300 }
297 for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, &nid)
298 memory_present(nid, start, end);
301}
302
303/*
304 * Subtle, we encode the real pfn into the mem_map such that
305 * the identity pfn - section_mem_map will return the actual
306 * physical page frame number.
307 */
308static unsigned long sparse_encode_mem_map(struct page *mem_map, unsigned long pnum)

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300
301/*
302 * Subtle, we encode the real pfn into the mem_map such that
303 * the identity pfn - section_mem_map will return the actual
304 * physical page frame number.
305 */
306static unsigned long sparse_encode_mem_map(struct page *mem_map, unsigned long pnum)

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