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mm: split altmap memory map allocation from normal case 

No functional changes, just untangling the call chain and document
why the altmap is passed around the hotplug code.

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 08:53:58 +01:00 committed by Dan Williams
parent a99583e780
commit a8fc357b28
4 changed files with 13 additions and 21 deletions
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5
arch/powerpc/mm/init_64.c
View File

@ -200,7 +200,10 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
if (vmemmap_populated(start, page_size))
continue;
p = __vmemmap_alloc_block_buf(page_size, node, altmap);
if (altmap)
p = altmap_alloc_block_buf(page_size, altmap);
else
p = vmemmap_alloc_block_buf(page_size, node);
if (!p)
return -ENOMEM;

5
arch/x86/mm/init_64.c
View File

@ -1385,7 +1385,10 @@ static int __meminit vmemmap_populate_hugepages(unsigned long start,
if (pmd_none(*pmd)) {
void *p;
p = __vmemmap_alloc_block_buf(PMD_SIZE, node, altmap);
if (altmap)
p = altmap_alloc_block_buf(PMD_SIZE, altmap);
else
p = vmemmap_alloc_block_buf(PMD_SIZE, node);
if (p) {
pte_t entry;

9
include/linux/mm.h
View File

@ -2547,13 +2547,8 @@ pmd_t *vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node);
pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node);
void *vmemmap_alloc_block(unsigned long size, int node);
struct vmem_altmap;
void *__vmemmap_alloc_block_buf(unsigned long size, int node,
struct vmem_altmap *altmap);
static inline void *vmemmap_alloc_block_buf(unsigned long size, int node)
{
return __vmemmap_alloc_block_buf(size, node, NULL);
}
void *vmemmap_alloc_block_buf(unsigned long size, int node);
void *altmap_alloc_block_buf(unsigned long size, struct vmem_altmap *altmap);
void vmemmap_verify(pte_t *, int, unsigned long, unsigned long);
int vmemmap_populate_basepages(unsigned long start, unsigned long end,
int node);

15
mm/sparse-vmemmap.c
View File

@ -74,7 +74,7 @@ void * __meminit vmemmap_alloc_block(unsigned long size, int node)
}
/* need to make sure size is all the same during early stage */
static void * __meminit alloc_block_buf(unsigned long size, int node)
void * __meminit vmemmap_alloc_block_buf(unsigned long size, int node)
{
void *ptr;
@ -129,7 +129,7 @@ static unsigned long __meminit vmem_altmap_alloc(struct vmem_altmap *altmap,
return pfn + nr_align;
}
static void * __meminit altmap_alloc_block_buf(unsigned long size,
void * __meminit altmap_alloc_block_buf(unsigned long size,
struct vmem_altmap *altmap)
{
unsigned long pfn, nr_pfns;
@ -153,15 +153,6 @@ static void * __meminit altmap_alloc_block_buf(unsigned long size,
return ptr;
}
/* need to make sure size is all the same during early stage */
void * __meminit __vmemmap_alloc_block_buf(unsigned long size, int node,
struct vmem_altmap *altmap)
{
if (altmap)
return altmap_alloc_block_buf(size, altmap);
return alloc_block_buf(size, node);
}
void __meminit vmemmap_verify(pte_t *pte, int node,
unsigned long start, unsigned long end)
{
@ -178,7 +169,7 @@ pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node)
pte_t *pte = pte_offset_kernel(pmd, addr);
if (pte_none(*pte)) {
pte_t entry;
void *p = alloc_block_buf(PAGE_SIZE, node);
void *p = vmemmap_alloc_block_buf(PAGE_SIZE, node);
if (!p)
return NULL;
entry = pfn_pte(__pa(p) >> PAGE_SHIFT, PAGE_KERNEL);