diff options
| -rw-r--r-- | mm/percpu.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 653b02c..5486243 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -94,10 +94,11 @@ struct pcpu_chunk { struct list_head list; /* linked to pcpu_slot lists */ int free_size; /* free bytes in the chunk */ int contig_hint; /* max contiguous size hint */ - struct vm_struct *vm; /* mapped vmalloc region */ + void *base_addr; /* base address of this chunk */ int map_used; /* # of map entries used */ int map_alloc; /* # of map entries allocated */ int *map; /* allocation map */ + struct vm_struct *vm; /* mapped vmalloc region */ bool immutable; /* no [de]population allowed */ unsigned long populated[]; /* populated bitmap */ }; @@ -196,7 +197,7 @@ static int pcpu_page_idx(unsigned int cpu, int page_idx) static unsigned long pcpu_chunk_addr(struct pcpu_chunk *chunk, unsigned int cpu, int page_idx) { - return (unsigned long)chunk->vm->addr + pcpu_unit_offsets[cpu] + + return (unsigned long)chunk->base_addr + pcpu_unit_offsets[cpu] + (page_idx << PAGE_SHIFT); } @@ -324,7 +325,7 @@ 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->vm->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) { @@ -1014,6 +1015,7 @@ static struct pcpu_chunk *alloc_pcpu_chunk(void) INIT_LIST_HEAD(&chunk->list); chunk->free_size = pcpu_unit_size; chunk->contig_hint = pcpu_unit_size; + chunk->base_addr = chunk->vm->addr; return chunk; } @@ -1103,8 +1105,8 @@ area_found: mutex_unlock(&pcpu_alloc_mutex); - /* return address relative to unit0 */ - return __addr_to_pcpu_ptr(chunk->vm->addr + off); + /* return address relative to base address */ + return __addr_to_pcpu_ptr(chunk->base_addr + off); fail_unlock: spin_unlock_irq(&pcpu_lock); @@ -1213,7 +1215,7 @@ void free_percpu(void *ptr) spin_lock_irqsave(&pcpu_lock, flags); chunk = pcpu_chunk_addr_search(addr); - off = addr - chunk->vm->addr; + off = addr - chunk->base_addr; pcpu_free_area(chunk, off); @@ -1565,7 +1567,6 @@ static void pcpu_dump_alloc_info(const char *lvl, int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, void *base_addr) { - static struct vm_struct first_vm; static int smap[2], dmap[2]; size_t dyn_size = ai->dyn_size; size_t size_sum = ai->static_size + ai->reserved_size + dyn_size; @@ -1629,10 +1630,6 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, pcpu_chunk_struct_size = sizeof(struct pcpu_chunk) + BITS_TO_LONGS(pcpu_unit_pages) * sizeof(unsigned long); - first_vm.flags = VM_ALLOC; - first_vm.size = pcpu_chunk_size; - first_vm.addr = base_addr; - /* * Allocate chunk slots. The additional last slot is for * empty chunks. @@ -1651,7 +1648,7 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, */ schunk = alloc_bootmem(pcpu_chunk_struct_size); INIT_LIST_HEAD(&schunk->list); - schunk->vm = &first_vm; + schunk->base_addr = base_addr; schunk->map = smap; schunk->map_alloc = ARRAY_SIZE(smap); schunk->immutable = true; @@ -1675,7 +1672,7 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, if (dyn_size) { dchunk = alloc_bootmem(pcpu_chunk_struct_size); INIT_LIST_HEAD(&dchunk->list); - dchunk->vm = &first_vm; + dchunk->base_addr = base_addr; dchunk->map = dmap; dchunk->map_alloc = ARRAY_SIZE(dmap); dchunk->immutable = true; @@ -1691,7 +1688,7 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, pcpu_chunk_relocate(pcpu_first_chunk, -1); /* we're done */ - pcpu_base_addr = schunk->vm->addr; + pcpu_base_addr = base_addr; return 0; } |