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| author |   Logan Gunthorpe <logang@deltatee.com> | 2018-12-14 14:16:57 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-14 15:05:45 -0800 |
| commit | 9def36e0fa9a0d9c5393c039db59f1f2d3a388b3 (patch) | |
| tree | 5288794d13f07dba8f7a326b3b0ba49b7d832413 /mm/sparse.c | |
| parent | mm: introduce common STRUCT_PAGE_MAX_SHIFT define (diff) | |
| download | linux-dev-9def36e0fa9a0d9c5393c039db59f1f2d3a388b3.tar.xz linux-dev-9def36e0fa9a0d9c5393c039db59f1f2d3a388b3.zip | |
mm/sparse: add common helper to mark all memblocks present
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>
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 33307fc05c4d..3abc8cc50201 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -240,6 +240,22 @@ 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 * physical page frame number. |