diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2019-05-15 01:41:32 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-15 05:52:48 +0300 |
| commit | b03641af680959df57c275a80ff0dc116627c7ae (patch) | |
| tree | 7420434fe3c82ebdd7b05cc59febe49e0e946366 /include/linux/mmzone.h | |
| parent | e900a918b0984ec8f2eb150b8477a47b75d17692 (diff) | |
| download | linux-b03641af680959df57c275a80ff0dc116627c7ae.tar.xz | |
mm: move buddy list manipulations into helpers
In preparation for runtime randomization of the zone lists, take all
(well, most of) the list_*() functions in the buddy allocator and put
them in helper functions. Provide a common control point for injecting
additional behavior when freeing pages.
[dan.j.williams@intel.com: fix buddy list helpers]
Link: http://lkml.kernel.org/r/155033679702.1773410.13041474192173212653.stgit@dwillia2-desk3.amr.corp.intel.com
[vbabka@suse.cz: remove del_page_from_free_area() migratetype parameter]
Link: http://lkml.kernel.org/r/4672701b-6775-6efd-0797-b6242591419e@suse.cz
Link: http://lkml.kernel.org/r/154899812264.3165233.5219320056406926223.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Robert Elliott <elliott@hpe.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 1fb5a04530aa..acd6f9cb01bd 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -18,6 +18,8 @@ #include <linux/pageblock-flags.h> #include <linux/page-flags-layout.h> #include <linux/atomic.h> +#include <linux/mm_types.h> +#include <linux/page-flags.h> #include <asm/page.h> /* Free memory management - zoned buddy allocator. */ @@ -98,6 +100,50 @@ struct free_area { unsigned long nr_free; }; +/* Used for pages not on another list */ +static inline void add_to_free_area(struct page *page, struct free_area *area, + int migratetype) +{ + list_add(&page->lru, &area->free_list[migratetype]); + area->nr_free++; +} + +/* Used for pages not on another list */ +static inline void add_to_free_area_tail(struct page *page, struct free_area *area, + int migratetype) +{ + list_add_tail(&page->lru, &area->free_list[migratetype]); + area->nr_free++; +} + +/* Used for pages which are on another list */ +static inline void move_to_free_area(struct page *page, struct free_area *area, + int migratetype) +{ + list_move(&page->lru, &area->free_list[migratetype]); +} + +static inline struct page *get_page_from_free_area(struct free_area *area, + int migratetype) +{ + return list_first_entry_or_null(&area->free_list[migratetype], + struct page, lru); +} + +static inline void del_page_from_free_area(struct page *page, + struct free_area *area) +{ + list_del(&page->lru); + __ClearPageBuddy(page); + set_page_private(page, 0); + area->nr_free--; +} + +static inline bool free_area_empty(struct free_area *area, int migratetype) +{ + return list_empty(&area->free_list[migratetype]); +} + struct pglist_data; /* |