diff options
author | Zhang Yanfei <zhangyanfei@cn.fujitsu.com> | 2013-11-12 15:07:42 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:06 +0900 |
commit | 85b35feaecd4d2284505b22708795bc1f03fc897 (patch) | |
tree | 0160ae1452e94c2fcaf5f20b84c0f4b39a6882d2 /mm/sparse.c | |
parent | 071aee138410210e3764f3ae8d37ef46dc6d3b42 (diff) | |
download | op-kernel-dev-85b35feaecd4d2284505b22708795bc1f03fc897.zip op-kernel-dev-85b35feaecd4d2284505b22708795bc1f03fc897.tar.gz |
mm/sparsemem: use PAGES_PER_SECTION to remove redundant nr_pages parameter
For below functions,
- sparse_add_one_section()
- kmalloc_section_memmap()
- __kmalloc_section_memmap()
- __kfree_section_memmap()
they are always invoked to operate on one memory section, so it is
redundant to always pass a nr_pages parameter, which is the page numbers
in one section. So we can directly use predefined macro PAGES_PER_SECTION
instead of passing the parameter.
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/sparse.c')
-rw-r--r-- | mm/sparse.c | 33 |
1 files changed, 15 insertions, 18 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 4ac1d7e..fbb9dbc 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -590,16 +590,15 @@ void __init sparse_init(void) #ifdef CONFIG_MEMORY_HOTPLUG #ifdef CONFIG_SPARSEMEM_VMEMMAP -static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid, - unsigned long nr_pages) +static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid) { /* This will make the necessary allocations eventually. */ return sparse_mem_map_populate(pnum, nid); } -static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages) +static void __kfree_section_memmap(struct page *memmap) { unsigned long start = (unsigned long)memmap; - unsigned long end = (unsigned long)(memmap + nr_pages); + unsigned long end = (unsigned long)(memmap + PAGES_PER_SECTION); vmemmap_free(start, end); } @@ -613,10 +612,10 @@ static void free_map_bootmem(struct page *memmap, unsigned long nr_pages) } #endif /* CONFIG_MEMORY_HOTREMOVE */ #else -static struct page *__kmalloc_section_memmap(unsigned long nr_pages) +static struct page *__kmalloc_section_memmap(void) { struct page *page, *ret; - unsigned long memmap_size = sizeof(struct page) * nr_pages; + unsigned long memmap_size = sizeof(struct page) * PAGES_PER_SECTION; page = alloc_pages(GFP_KERNEL|__GFP_NOWARN, get_order(memmap_size)); if (page) @@ -634,19 +633,18 @@ got_map_ptr: return ret; } -static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid, - unsigned long nr_pages) +static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid) { - return __kmalloc_section_memmap(nr_pages); + return __kmalloc_section_memmap(); } -static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages) +static void __kfree_section_memmap(struct page *memmap) { if (is_vmalloc_addr(memmap)) vfree(memmap); else free_pages((unsigned long)memmap, - get_order(sizeof(struct page) * nr_pages)); + get_order(sizeof(struct page) * PAGES_PER_SECTION)); } #ifdef CONFIG_MEMORY_HOTREMOVE @@ -684,8 +682,7 @@ static void free_map_bootmem(struct page *memmap, unsigned long nr_pages) * set. If this is <=0, then that means that the passed-in * map was not consumed and must be freed. */ -int __meminit sparse_add_one_section(struct zone *zone, unsigned long start_pfn, - int nr_pages) +int __meminit sparse_add_one_section(struct zone *zone, unsigned long start_pfn) { unsigned long section_nr = pfn_to_section_nr(start_pfn); struct pglist_data *pgdat = zone->zone_pgdat; @@ -702,12 +699,12 @@ int __meminit sparse_add_one_section(struct zone *zone, unsigned long start_pfn, ret = sparse_index_init(section_nr, pgdat->node_id); if (ret < 0 && ret != -EEXIST) return ret; - memmap = kmalloc_section_memmap(section_nr, pgdat->node_id, nr_pages); + memmap = kmalloc_section_memmap(section_nr, pgdat->node_id); if (!memmap) return -ENOMEM; usemap = __kmalloc_section_usemap(); if (!usemap) { - __kfree_section_memmap(memmap, nr_pages); + __kfree_section_memmap(memmap); return -ENOMEM; } @@ -719,7 +716,7 @@ int __meminit sparse_add_one_section(struct zone *zone, unsigned long start_pfn, goto out; } - memset(memmap, 0, sizeof(struct page) * nr_pages); + memset(memmap, 0, sizeof(struct page) * PAGES_PER_SECTION); ms->section_mem_map |= SECTION_MARKED_PRESENT; @@ -729,7 +726,7 @@ out: pgdat_resize_unlock(pgdat, &flags); if (ret <= 0) { kfree(usemap); - __kfree_section_memmap(memmap, nr_pages); + __kfree_section_memmap(memmap); } return ret; } @@ -771,7 +768,7 @@ static void free_section_usemap(struct page *memmap, unsigned long *usemap) if (PageSlab(usemap_page) || PageCompound(usemap_page)) { kfree(usemap); if (memmap) - __kfree_section_memmap(memmap, PAGES_PER_SECTION); + __kfree_section_memmap(memmap); return; } |