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mm: use 'unsigned int' for page order

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Let's try to be consistent about data type of page order.

[[email protected]: fix build (type of pageblock_order)]
[[email protected]: some configs end up with MAX_ORDER and pageblock_order having different types]
Signed-off-by: Kirill A. Shutemov <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Reviewed-by: Andrea Arcangeli <[email protected]>
Cc: "Paul E. McKenney" <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Aneesh Kumar K.V <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Signed-off-by: Stephen Rothwell <[email protected]>
Signed-off-by: Hugh Dickins <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Kirill A. Shutemov 2015-11-06 16:29:57 -08:00 • committed by Linus Torvalds
commit d00181b96e
5 changed files with 32 additions and 27 deletions
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4
mm/internal.h
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@ -177,7 +177,7 @@ __find_buddy_index(unsigned long page_idx, unsigned int order)
extern int __isolate_free_page(struct page *page, unsigned int order);
extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
unsigned int order);
extern void prep_compound_page(struct page *page, unsigned long order);
extern void prep_compound_page(struct page *page, unsigned int order);
#ifdef CONFIG_MEMORY_FAILURE
extern bool is_free_buddy_page(struct page *page);
#endif
@ -235,7 +235,7 @@ int find_suitable_fallback(struct free_area *area, unsigned int order,
* page cannot be allocated or merged in parallel. Alternatively, it must
* handle invalid values gracefully, and use page_order_unsafe() below.
*/
static inline unsigned long page_order(struct page *page)
static inline unsigned int page_order(struct page *page)
{
/* PageBuddy() must be checked by the caller */
return page_private(page);