diff options
Diffstat (limited to 'mm/percpu-vm.c')
| -rw-r--r-- | mm/percpu-vm.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/mm/percpu-vm.c b/mm/percpu-vm.c index 47b47bfbcb66..d9e0b615492e 100644 --- a/mm/percpu-vm.c +++ b/mm/percpu-vm.c @@ -22,21 +22,22 @@ static struct page *pcpu_chunk_page(struct pcpu_chunk *chunk, /** * pcpu_get_pages - get temp pages array * @chunk: chunk of interest - * @may_alloc: may allocate the array * * Returns pointer to array of pointers to struct page which can be indexed - * with pcpu_page_idx(). Note that there is only one array and access - * exclusion is the caller's responsibility. + * with pcpu_page_idx(). Note that there is only one array and accesses + * should be serialized by pcpu_alloc_mutex. * * RETURNS: * Pointer to temp pages array on success. */ -static struct page **pcpu_get_pages(struct pcpu_chunk *chunk, bool may_alloc) +static struct page **pcpu_get_pages(struct pcpu_chunk *chunk_alloc) { static struct page **pages; size_t pages_size = pcpu_nr_units * pcpu_unit_pages * sizeof(pages[0]); - if (!pages && may_alloc) + lockdep_assert_held(&pcpu_alloc_mutex); + + if (!pages) pages = pcpu_mem_zalloc(pages_size); return pages; } @@ -287,7 +288,7 @@ static int pcpu_populate_chunk(struct pcpu_chunk *chunk, int off, int size) /* need to allocate and map pages, this chunk can't be immutable */ WARN_ON(chunk->immutable); - pages = pcpu_get_pages(chunk, true); + pages = pcpu_get_pages(chunk); if (!pages) return -ENOMEM; @@ -358,7 +359,7 @@ static void pcpu_depopulate_chunk(struct pcpu_chunk *chunk, int off, int size) * successful population attempt so the temp pages array must * be available now. */ - pages = pcpu_get_pages(chunk, false); + pages = pcpu_get_pages(chunk); BUG_ON(!pages); /* unmap and free */ |