diff options
-rw-r--r-- | mm/percpu.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 5fe37842e0ea..3311c8919f37 100644 --- a/mm/percpu.c +++ b/mm/percpu.c | |||
@@ -197,7 +197,12 @@ static unsigned long pcpu_chunk_addr(struct pcpu_chunk *chunk, | |||
197 | static bool pcpu_chunk_page_occupied(struct pcpu_chunk *chunk, | 197 | static bool pcpu_chunk_page_occupied(struct pcpu_chunk *chunk, |
198 | int page_idx) | 198 | int page_idx) |
199 | { | 199 | { |
200 | return *pcpu_chunk_pagep(chunk, 0, page_idx) != NULL; | 200 | /* |
201 | * Any possible cpu id can be used here, so there's no need to | ||
202 | * worry about preemption or cpu hotplug. | ||
203 | */ | ||
204 | return *pcpu_chunk_pagep(chunk, raw_smp_processor_id(), | ||
205 | page_idx) != NULL; | ||
201 | } | 206 | } |
202 | 207 | ||
203 | /* set the pointer to a chunk in a page struct */ | 208 | /* set the pointer to a chunk in a page struct */ |
@@ -297,6 +302,14 @@ static struct pcpu_chunk *pcpu_chunk_addr_search(void *addr) | |||
297 | return pcpu_first_chunk; | 302 | return pcpu_first_chunk; |
298 | } | 303 | } |
299 | 304 | ||
305 | /* | ||
306 | * The address is relative to unit0 which might be unused and | ||
307 | * thus unmapped. Offset the address to the unit space of the | ||
308 | * current processor before looking it up in the vmalloc | ||
309 | * space. Note that any possible cpu id can be used here, so | ||
310 | * there's no need to worry about preemption or cpu hotplug. | ||
311 | */ | ||
312 | addr += raw_smp_processor_id() * pcpu_unit_size; | ||
300 | return pcpu_get_page_chunk(vmalloc_to_page(addr)); | 313 | return pcpu_get_page_chunk(vmalloc_to_page(addr)); |
301 | } | 314 | } |
302 | 315 | ||