diff options
Diffstat (limited to 'include/asm-arm/memory.h')
| -rw-r--r-- | include/asm-arm/memory.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h index e47bea7d172..a8a933a775d 100644 --- a/include/asm-arm/memory.h +++ b/include/asm-arm/memory.h @@ -160,12 +160,25 @@ static inline __deprecated void *bus_to_virt(unsigned long x) #define page_to_pfn(page) \ (( (page) - page_zone(page)->zone_mem_map) \ + page_zone(page)->zone_start_pfn) + #define pfn_to_page(pfn) \ (PFN_TO_MAPBASE(pfn) + LOCAL_MAP_NR((pfn) << PAGE_SHIFT)) -#define pfn_valid(pfn) (PFN_TO_NID(pfn) < MAX_NUMNODES) + +#define pfn_valid(pfn) \ + ({ \ + unsigned int nid = PFN_TO_NID(pfn); \ + int valid = nid < MAX_NUMNODES; \ + if (valid) { \ + pg_data_t *node = NODE_DATA(nid); \ + valid = (pfn - node->node_start_pfn) < \ + node->node_spanned_pages; \ + } \ + valid; \ + }) #define virt_to_page(kaddr) \ (ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr)) + #define virt_addr_valid(kaddr) (KVADDR_TO_NID(kaddr) < MAX_NUMNODES) /* |