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powerpc: implement vmemmap_remove_mapping() for BOOK3S 

This is to be called in vmemmap_free(), leave the implementation on BOOK3E
empty as before.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Acked-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Li Zhong 2014-06-11 16:23:37 +08:00 committed by Benjamin Herrenschmidt
parent bd8cb03dbe
commit ed5694a846
2 changed files with 23 additions and 1 deletions
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2
arch/powerpc/mm/hash_utils_64.c
View File

@ -243,7 +243,7 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
}
#ifdef CONFIG_MEMORY_HOTPLUG
static int htab_remove_mapping(unsigned long vstart, unsigned long vend,
int htab_remove_mapping(unsigned long vstart, unsigned long vend,
int psize, int ssize)
{
unsigned long vaddr;

22
arch/powerpc/mm/init_64.c
View File

@ -212,6 +212,13 @@ static void __meminit vmemmap_create_mapping(unsigned long start,
for (i = 0; i < page_size; i += PAGE_SIZE)
BUG_ON(map_kernel_page(start + i, phys, flags));
}
#ifdef CONFIG_MEMORY_HOTPLUG
static void vmemmap_remove_mapping(unsigned long start,
unsigned long page_size)
{
}
#endif
#else /* CONFIG_PPC_BOOK3E */
static void __meminit vmemmap_create_mapping(unsigned long start,
unsigned long page_size,
@ -223,6 +230,21 @@ static void __meminit vmemmap_create_mapping(unsigned long start,
mmu_kernel_ssize);
BUG_ON(mapped < 0);
}
#ifdef CONFIG_MEMORY_HOTPLUG
extern int htab_remove_mapping(unsigned long vstart, unsigned long vend,
int psize, int ssize);
static void vmemmap_remove_mapping(unsigned long start,
unsigned long page_size)
{
int mapped = htab_remove_mapping(start, start + page_size,
mmu_vmemmap_psize,
mmu_kernel_ssize);
BUG_ON(mapped < 0);
}
#endif
#endif /* CONFIG_PPC_BOOK3E */
struct vmemmap_backing *vmemmap_list;