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| author | Mike Rapoport <rppt@linux.ibm.com> | 2021-09-02 23:58:02 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-03 18:58:15 +0200 |
| commit | c803b3c8b3b70f306ee6300bf8acdd70ffd1441a (patch) | |
| tree | 7ffa7206a7d32de16edc7741d482c9c3d2c8f219 /mm/internal.h | |
| parent | microblaze: simplify pte_alloc_one_kernel() (diff) | |
| download | linux-c803b3c8b3b70f306ee6300bf8acdd70ffd1441a.tar.xz linux-c803b3c8b3b70f306ee6300bf8acdd70ffd1441a.zip | |
mm: introduce memmap_alloc() to unify memory map allocation
There are several places that allocate memory for the memory map:
alloc_node_mem_map() for FLATMEM, sparse_buffer_init() and
__populate_section_memmap() for SPARSEMEM.
The memory allocated in the FLATMEM case is zeroed and it is never
poisoned, regardless of CONFIG_PAGE_POISON setting.
The memory allocated in the SPARSEMEM cases is not zeroed and it is
implicitly poisoned inside memblock if CONFIG_PAGE_POISON is set.
Introduce memmap_alloc() wrapper for memblock allocators that will be used
for both FLATMEM and SPARSEMEM cases and will makei memory map zeroing and
poisoning consistent for different memory models.
Link: https://lkml.kernel.org/r/20210714123739.16493-4-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 31ff935b2547..57e28261a3b1 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -211,6 +211,10 @@ extern void zone_pcp_reset(struct zone *zone); extern void zone_pcp_disable(struct zone *zone); extern void zone_pcp_enable(struct zone *zone); +extern void *memmap_alloc(phys_addr_t size, phys_addr_t align, + phys_addr_t min_addr, + int nid, bool exact_nid); + #if defined CONFIG_COMPACTION || defined CONFIG_CMA /* |