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mm/mempolicy: rewrite alloc_pages documentation

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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>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-04-29 23:01:21 -07:00 committed by Linus Torvalds
parent d7f946d0fa
commit 6421ec764a
1 changed files with 10 additions and 11 deletions
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21
mm/mempolicy.c
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@ -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)
{