diff options
Diffstat (limited to 'include/linux/page-isolation.h')
| -rw-r--r-- | include/linux/page-isolation.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h index 051c1b1..4502fdc 100644 --- a/include/linux/page-isolation.h +++ b/include/linux/page-isolation.h @@ -1,6 +1,7 @@ #ifndef __LINUX_PAGEISOLATION_H #define __LINUX_PAGEISOLATION_H +#ifndef CONFIG_DMA_CMA /* * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE. * If specified range includes migrate types other than MOVABLE, @@ -33,5 +34,38 @@ test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn); extern int set_migratetype_isolate(struct page *page); extern void unset_migratetype_isolate(struct page *page); +#else +/* + * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE. + * If specified range includes migrate types other than MOVABLE or CMA, + * this will fail with -EBUSY. + * + * For isolating all pages in the range finally, the caller have to + * free all pages in the range. test_page_isolated() can be used for + * test it. + */ +extern int +start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, + unsigned migratetype); + +/* + * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE. + * target range is [start_pfn, end_pfn) + */ +extern int +undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, + unsigned migratetype); + +/* + * Test all pages in [start_pfn, end_pfn) are isolated or not. + */ +int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn); + +/* + * Internal functions. Changes pageblock's migrate type. + */ +extern int set_migratetype_isolate(struct page *page); +extern void unset_migratetype_isolate(struct page *page, unsigned migratetype); +#endif #endif |