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mm: merge vmem_altmap_alloc into altmap_alloc_block_buf 

There is no clear separation between the two, so merge them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Christoph Hellwig 2017-12-29 08:53:59 +01:00 committed by Dan Williams
parent a8fc357b28
commit eb8045335c
1 changed files with 16 additions and 29 deletions
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45
mm/sparse-vmemmap.c
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@ -107,33 +107,16 @@ static unsigned long __meminit vmem_altmap_nr_free(struct vmem_altmap *altmap)
}
/**
* vmem_altmap_alloc - allocate pages from the vmem_altmap reservation
* @altmap - reserved page pool for the allocation
* @nr_pfns - size (in pages) of the allocation
* altmap_alloc_block_buf - allocate pages from the device page map
* @altmap: device page map
* @size: size (in bytes) of the allocation
*
* Allocations are aligned to the size of the request
* Allocations are aligned to the size of the request.
*/
static unsigned long __meminit vmem_altmap_alloc(struct vmem_altmap *altmap,
unsigned long nr_pfns)
{
unsigned long pfn = vmem_altmap_next_pfn(altmap);
unsigned long nr_align;
nr_align = 1UL << find_first_bit(&nr_pfns, BITS_PER_LONG);
nr_align = ALIGN(pfn, nr_align) - pfn;
if (nr_pfns + nr_align > vmem_altmap_nr_free(altmap))
return ULONG_MAX;
altmap->alloc += nr_pfns;
altmap->align += nr_align;
return pfn + nr_align;
}
void * __meminit altmap_alloc_block_buf(unsigned long size,
struct vmem_altmap *altmap)
{
unsigned long pfn, nr_pfns;
void *ptr;
unsigned long pfn, nr_pfns, nr_align;
if (size & ~PAGE_MASK) {
pr_warn_once("%s: allocations must be multiple of PAGE_SIZE (%ld)\n",
@ -141,16 +124,20 @@ void * __meminit altmap_alloc_block_buf(unsigned long size,
return NULL;
}
pfn = vmem_altmap_next_pfn(altmap);
nr_pfns = size >> PAGE_SHIFT;
pfn = vmem_altmap_alloc(altmap, nr_pfns);
if (pfn < ULONG_MAX)
ptr = __va(__pfn_to_phys(pfn));
else
ptr = NULL;
nr_align = 1UL << find_first_bit(&nr_pfns, BITS_PER_LONG);
nr_align = ALIGN(pfn, nr_align) - pfn;
if (nr_pfns + nr_align > vmem_altmap_nr_free(altmap))
return NULL;
altmap->alloc += nr_pfns;
altmap->align += nr_align;
pfn += nr_align;
pr_debug("%s: pfn: %#lx alloc: %ld align: %ld nr: %#lx\n",
__func__, pfn, altmap->alloc, altmap->align, nr_pfns);
return ptr;
return __va(__pfn_to_phys(pfn));
}
void __meminit vmemmap_verify(pte_t *pte, int node,