diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-04-29 23:01:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-30 11:20:43 -0700 |
| commit | 6421ec764a62c51f810c5dc40cd45eeb15801ad9 (patch) | |
| tree | b7d639bb83bd9f7b9aba6e9554ee0e1211139128 | |
| parent | d7f946d0faf90014547ee5d090e9d05018278c7a (diff) | |
mm/mempolicy: rewrite alloc_pages documentation
Document alloc_pages() for both NUMA and non-NUMA cases as kernel-doc
doesn't care.
Link: https://lkml.kernel.org/r/20210225150642.2582252-6-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mempolicy.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index c71532b7e3f8..24c2100fccba 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2245,19 +2245,18 @@ out: EXPORT_SYMBOL(alloc_pages_vma); /** - * alloc_pages - Allocate pages. + * alloc_pages - Allocate pages. + * @gfp: GFP flags. + * @order: Power of two of number of pages to allocate. * - * @gfp: - * %GFP_USER user allocation, - * %GFP_KERNEL kernel allocation, - * %GFP_HIGHMEM highmem allocation, - * %GFP_FS don't call back into a file system. - * %GFP_ATOMIC don't sleep. - * @order: Power of two of allocation size in pages. 0 is a single page. + * Allocate 1 << @order contiguous pages. The physical address of the + * first page is naturally aligned (eg an order-3 allocation will be aligned + * to a multiple of 8 * PAGE_SIZE bytes). The NUMA policy of the current + * process is honoured when in process context. * - * Allocate a page from the kernel page pool. When not in - * interrupt context and apply the current process NUMA policy. - * Returns NULL when no page can be allocated. + * Context: Can be called from any context, providing the appropriate GFP + * flags are used. + * Return: The page on success or NULL if allocation fails. */ struct page *alloc_pages(gfp_t gfp, unsigned order) { |