diff options
| -rw-r--r-- | mm/page_alloc.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e20ade858e71..b5a6c815ae28 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5784,14 +5784,18 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { if (addr) { - unsigned long alloc_end = addr + (PAGE_SIZE << order); - unsigned long used = addr + PAGE_ALIGN(size); - - split_page(virt_to_page((void *)addr), order); - while (used < alloc_end) { - free_page(used); - used += PAGE_SIZE; - } + unsigned long nr = DIV_ROUND_UP(size, PAGE_SIZE); + struct page *page = virt_to_page((void *)addr); + struct page *last = page + nr; + + split_page_owner(page, 1 << order); + split_page_memcg(page, 1 << order); + while (page < --last) + set_page_refcounted(last); + + last = page + (1UL << order); + for (page += nr; page < last; page++) + __free_pages_ok(page, 0, FPI_TO_TAIL); } return (void *)addr; } |