diff options
| author | Logan Gunthorpe <logang@deltatee.com> | 2018-11-17 13:39:10 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2018-11-28 15:34:30 +1100 |
| commit | a8d4052c935ad064896edb74c0574f5c3081e776 (patch) | |
| tree | 6c1c9ca7f8ae84e406af84d72afe7b70becaa440 | |
| parent | 7e4e3e662b45146a6e57a49a3a133d647e74db28 (diff) | |
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: Stephen Rothwell <sfr@canb.auug.org.au>
| -rw-r--r-- | include/linux/mmzone.h | 6 | ||||
| -rw-r--r-- | mm/sparse.c | 16 |
2 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index c71b4d911ebb..05b2e0e95e9e 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -782,6 +782,12 @@ 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 diff --git a/mm/sparse.c b/mm/sparse.c index b6ed029a2f46..691544a2814c 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. |