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mm/mempolicy: rewrite alloc_pages_vma documentation 

The current formatting doesn't quite work with kernel-doc.

Link: https://lkml.kernel.org/r/20210225150642.2582252-7-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@suse.com>
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 23:01:24 -07:00 committed by Linus Torvalds
parent 6421ec764a
commit eb35073960
1 changed files with 13 additions and 21 deletions
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34
mm/mempolicy.c
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@ -2153,30 +2153,22 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order,
}
/**
* alloc_pages_vma - Allocate a page for a VMA.
* alloc_pages_vma - Allocate a page for a VMA.
* @gfp: GFP flags.
* @order: Order of the GFP allocation.
* @vma: Pointer to VMA or NULL if not available.
* @addr: Virtual address of the allocation. Must be inside @vma.
* @node: Which node to prefer for allocation (modulo policy).
* @hugepage: For hugepages try only the preferred node if possible.
*
* @gfp:
* %GFP_USER user allocation.
* %GFP_KERNEL kernel allocations,
* %GFP_HIGHMEM highmem/user allocations,
* %GFP_FS allocation should not call back into a file system.
* %GFP_ATOMIC don't sleep.
* Allocate a page for a specific address in @vma, using the appropriate
* NUMA policy. When @vma is not NULL the caller must hold the mmap_lock
* of the mm_struct of the VMA to prevent it from going away. Should be
* used for all allocations for pages that will be mapped into user space.
*
* @order:Order of the GFP allocation.
* @vma: Pointer to VMA or NULL if not available.
* @addr: Virtual Address of the allocation. Must be inside the VMA.
* @node: Which node to prefer for allocation (modulo policy).
* @hugepage: for hugepages try only the preferred node if possible
*
* This function allocates a page from the kernel page pool and applies
* a NUMA policy associated with the VMA or the current process.
* When VMA is not NULL caller must read-lock the mmap_lock of the
* mm_struct of the VMA to prevent it from going away. Should be used for
* all allocations for pages that will be mapped into user space. Returns
* NULL when no page can be allocated.
* Return: The page on success or NULL if allocation fails.
*/
struct page *
alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
struct page *alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
unsigned long addr, int node, bool hugepage)
{
struct mempolicy *pol;