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powerpc: Fix build with CONFIG_MEMORY_HOTPLUG on some configs 

For memory hotplug to work, the MMU code needs to provide the functions
create_section_mapping() and remove_section_mapping() to respectively
map and unmap portions of the linear mapping.

At the moment only hash64 provides these, so we provide weak stubs that
just error out. This fixes the build with configurations such as 64-bit
BookE with CONFIG_MEMORY_HOTPLUG enabled.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2016-07-05 15:07:54 +10:00 committed by Michael Ellerman
parent e93d8e6773
commit fecbfabe1d
1 changed files with 10 additions and 0 deletions
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10
arch/powerpc/mm/mem.c
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@ -116,6 +116,16 @@ int memory_add_physaddr_to_nid(u64 start)
}
#endif
int __weak create_section_mapping(unsigned long start, unsigned long end)
{
return -ENODEV;
}
int __weak remove_section_mapping(unsigned long start, unsigned long end)
{
return -ENODEV;
}
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
{
struct pglist_data *pgdata;