diff options
Diffstat (limited to 'arch/arm64/mm/init.c')
| -rw-r--r-- | arch/arm64/mm/init.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index e55409caaee3..148e752a70f7 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -256,6 +256,18 @@ int pfn_valid(unsigned long pfn) } EXPORT_SYMBOL(pfn_valid); +int pfn_is_map_memory(unsigned long pfn) +{ + phys_addr_t addr = PFN_PHYS(pfn); + + /* avoid false positives for bogus PFNs, see comment in pfn_valid() */ + if (PHYS_PFN(addr) != pfn) + return 0; + + return memblock_is_map_memory(addr); +} +EXPORT_SYMBOL(pfn_is_map_memory); + static phys_addr_t memory_limit = PHYS_ADDR_MAX; /* |