diff options
| -rw-r--r-- | mm/percpu.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 6e09741ddc6..1aeb081f30e 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -177,6 +177,21 @@ static struct list_head *pcpu_slot __read_mostly; /* chunk list slots */ static void pcpu_reclaim(struct work_struct *work); static DECLARE_WORK(pcpu_reclaim_work, pcpu_reclaim); +static bool pcpu_addr_in_first_chunk(void *addr) +{ + void *first_start = pcpu_first_chunk->base_addr; + + return addr >= first_start && addr < first_start + pcpu_unit_size; +} + +static bool pcpu_addr_in_reserved_chunk(void *addr) +{ + void *first_start = pcpu_first_chunk->base_addr; + + return addr >= first_start && + addr < first_start + pcpu_reserved_chunk_limit; +} + static int __pcpu_size_to_slot(int size) { int highbit = fls(size); /* size is in bytes */ @@ -334,12 +349,10 @@ static void pcpu_chunk_relocate(struct pcpu_chunk *chunk, int oslot) */ static struct pcpu_chunk *pcpu_chunk_addr_search(void *addr) { - void *first_start = pcpu_first_chunk->base_addr; - /* is it in the first chunk? */ - if (addr >= first_start && addr < first_start + pcpu_unit_size) { + if (pcpu_addr_in_first_chunk(addr)) { /* is it in the reserved area? */ - if (addr < first_start + pcpu_reserved_chunk_limit) + if (pcpu_addr_in_reserved_chunk(addr)) return pcpu_reserved_chunk; return pcpu_first_chunk; } @@ -1343,10 +1356,13 @@ bool is_kernel_percpu_address(unsigned long addr) */ phys_addr_t per_cpu_ptr_to_phys(void *addr) { - if ((unsigned long)addr < VMALLOC_START || - (unsigned long)addr >= VMALLOC_END) - return __pa(addr); - else + if (pcpu_addr_in_first_chunk(addr)) { + if ((unsigned long)addr < VMALLOC_START || + (unsigned long)addr >= VMALLOC_END) + return __pa(addr); + else + return page_to_phys(vmalloc_to_page(addr)); + } else return page_to_phys(vmalloc_to_page(addr)); } |