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| author |   David Hildenbrand <david@redhat.com> | 2020-11-11 15:53:17 +0100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-11-19 16:56:58 +1100 |
| commit | 4abb1e5b63ac3281275315fc6b0cde0b9c2e2e42 (patch) | |
| tree | 1882235d135680c61cabf4a8bcc56fd6d640aac8 /include/linux/memory_hotplug.h | |
| parent | powerpc/powernv/memtrace: Fix crashing the kernel when enabling concurrently (diff) | |
| download | linux-dev-4abb1e5b63ac3281275315fc6b0cde0b9c2e2e42.tar.xz linux-dev-4abb1e5b63ac3281275315fc6b0cde0b9c2e2e42.zip | |
powerpc/mm: factor out creating/removing linear mapping
We want to stop abusing memory hotplug infrastructure in memtrace code
to perform allocations and remove the linear mapping. Instead we will use
alloc_contig_pages() and remove the linear mapping manually.
Let's factor out creating/removing the linear mapping into
arch_create_linear_mapping() / arch_remove_linear_mapping() - so in the
future, we might be able to have whole arch_add_memory() /
arch_remove_memory() be implemented in common code.
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201111145322.15793-4-david@redhat.com
Diffstat (limited to 'include/linux/memory_hotplug.h')
| -rw-r--r-- | include/linux/memory_hotplug.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index d65c6fdc5cfc..00b9e9bd3850 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -375,6 +375,9 @@ extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, unsigned long pnum); extern struct zone *zone_for_pfn_range(int online_type, int nid, unsigned start_pfn, unsigned long nr_pages); +extern int arch_create_linear_mapping(int nid, u64 start, u64 size, + struct mhp_params *params); +void arch_remove_linear_mapping(u64 start, u64 size); #endif /* CONFIG_MEMORY_HOTPLUG */ #endif /* __LINUX_MEMORY_HOTPLUG_H */ |