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staging: zsmalloc: rename zspage_order with zspage_pages

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zspage_order defines how many pages are needed to make a zspage.
So _order_ is rather awkward naming. It already deceive Jonathan
- http://lwn.net/Articles/477067/
" For each size, the code calculates an optimum number of pages (up to 16)"

Let's change from _order_ to _pages_ and some function names.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Acked-by: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Minchan Kim 2012-05-03 15:40:39 +09:00 committed by Greg Kroah-Hartman
parent 71a30f68c6
commit 2e3b615471
2 changed files with 8 additions and 8 deletions
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14
drivers/staging/zsmalloc/zsmalloc-main.c
View file

@ -180,7 +180,7 @@ static enum fullness_group fix_fullness_group(struct zs_pool *pool,
* link together 3 PAGE_SIZE sized pages to form a zspage
* since then we can perfectly fit in 8 such objects.
*/
static int get_zspage_order(int class_size)
static int get_pages_per_zspage(int class_size)
{
int i, max_usedpc = 0;
/* zspage order which gives maximum used size per KB */
@ -368,7 +368,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags)
* identify the last page.
*/
error = -ENOMEM;
for (i = 0; i < class->zspage_order; i++) {
for (i = 0; i < class->pages_per_zspage; i++) {
struct page *page, *prev_page;
page = alloc_page(flags);
@ -388,7 +388,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags)
page->first_page = first_page;
if (i >= 2)
list_add(&page->lru, &prev_page->lru);
if (i == class->zspage_order - 1) /* last page */
if (i == class->pages_per_zspage - 1) /* last page */
SetPagePrivate2(page);
prev_page = page;
}
@ -397,7 +397,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags)
first_page->freelist = obj_location_to_handle(first_page, 0);
/* Maximum number of objects we can store in this zspage */
first_page->objects = class->zspage_order * PAGE_SIZE / class->size;
first_page->objects = class->pages_per_zspage * PAGE_SIZE / class->size;
error = 0; /* Success */
@ -512,7 +512,7 @@ struct zs_pool *zs_create_pool(const char *name, gfp_t flags)
class->size = size;
class->index = i;
spin_lock_init(&class->lock);
class->zspage_order = get_zspage_order(size);
class->pages_per_zspage = get_pages_per_zspage(size);
}
@ -603,7 +603,7 @@ void *zs_malloc(struct zs_pool *pool, size_t size)
set_zspage_mapping(first_page, class->index, ZS_EMPTY);
spin_lock(&class->lock);
class->pages_allocated += class->zspage_order;
class->pages_allocated += class->pages_per_zspage;
}
obj = first_page->freelist;
@ -658,7 +658,7 @@ void zs_free(struct zs_pool *pool, void *obj)
fullness = fix_fullness_group(pool, first_page);
if (fullness == ZS_EMPTY)
class->pages_allocated -= class->zspage_order;
class->pages_allocated -= class->pages_per_zspage;
spin_unlock(&class->lock);

2
drivers/staging/zsmalloc/zsmalloc_int.h
View file

@ -124,7 +124,7 @@ struct size_class {
unsigned int index;
/* Number of PAGE_SIZE sized pages to combine to form a 'zspage' */
int zspage_order;
int pages_per_zspage;
spinlock_t lock;