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mm/sparse: move buffer init/fini to the common place 

Now that both variants of sparse memory use the same buffers to populate
memory map, we can move sparse_buffer_init()/sparse_buffer_fini() to the
common place.

Link: http://lkml.kernel.org/r/20180712203730.8703-4-pasha.tatashin@oracle.com
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>	[powerpc]
Tested-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Pasha Tatashin <Pavel.Tatashin@microsoft.com>
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Steven Sistare <steven.sistare@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Tatashin 2018-08-17 15:49:30 -07:00 committed by Linus Torvalds
parent e131c06b14
commit afda57bc13
3 changed files with 7 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/mm.h
View File

@ -2671,9 +2671,6 @@ void sparse_mem_maps_populate_node(struct page **map_map,
unsigned long map_count,
int nodeid);
unsigned long __init section_map_size(void);
void sparse_buffer_init(unsigned long size, int nid);
void sparse_buffer_fini(void);
void *sparse_buffer_alloc(unsigned long size);
struct page *sparse_mem_map_populate(unsigned long pnum, int nid,
struct vmem_altmap *altmap);

2
mm/sparse-vmemmap.c
View File

@ -270,7 +270,6 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
unsigned long pnum;
int nr_consumed_maps = 0;
sparse_buffer_init(section_map_size() * map_count, nodeid);
for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
if (!present_section_nr(pnum))
continue;
@ -282,5 +281,4 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
__func__);
}
sparse_buffer_fini();
}

14
mm/sparse.c
View File

@ -401,14 +401,14 @@ static void __init sparse_early_usemaps_alloc_node(void *data,
}
#ifdef CONFIG_SPARSEMEM_VMEMMAP
unsigned long __init section_map_size(void)
static unsigned long __init section_map_size(void)
{
return ALIGN(sizeof(struct page) * PAGES_PER_SECTION, PMD_SIZE);
}
#else
unsigned long __init section_map_size(void)
static unsigned long __init section_map_size(void)
{
return PAGE_ALIGN(sizeof(struct page) * PAGES_PER_SECTION);
}
@ -433,10 +433,8 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
unsigned long map_count, int nodeid)
{
unsigned long pnum;
unsigned long size = section_map_size();
int nr_consumed_maps = 0;
sparse_buffer_init(size * map_count, nodeid);
for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
if (!present_section_nr(pnum))
continue;
@ -447,14 +445,13 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
__func__);
}
sparse_buffer_fini();
}
#endif /* !CONFIG_SPARSEMEM_VMEMMAP */
static void *sparsemap_buf __meminitdata;
static void *sparsemap_buf_end __meminitdata;
void __init sparse_buffer_init(unsigned long size, int nid)
static void __init sparse_buffer_init(unsigned long size, int nid)
{
WARN_ON(sparsemap_buf); /* forgot to call sparse_buffer_fini()? */
sparsemap_buf =
@ -464,7 +461,7 @@ void __init sparse_buffer_init(unsigned long size, int nid)
sparsemap_buf_end = sparsemap_buf + size;
}
void __init sparse_buffer_fini(void)
static void __init sparse_buffer_fini(void)
{
unsigned long size = sparsemap_buf_end - sparsemap_buf;
@ -494,8 +491,11 @@ static void __init sparse_early_mem_maps_alloc_node(void *data,
unsigned long map_count, int nodeid)
{
struct page **map_map = (struct page **)data;
sparse_buffer_init(section_map_size() * map_count, nodeid);
sparse_mem_maps_populate_node(map_map, pnum_begin, pnum_end,
map_count, nodeid);
sparse_buffer_fini();
}
#else
static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)