Introduce helper function free_highmem_page(), which will be used by architectures with HIGHMEM enabled to free highmem pages into the buddy system.
Signed-off-by: Jiang Liu <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Michel Lespinasse <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Konstantin Khlebnikov <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Marek Szyprowski <[email protected]> Cc: Michal Nazarewicz <[email protected]> Cc: [email protected] Cc: [email protected] Cc: Russell King <[email protected]> Cc: David Howells <[email protected]> Cc: James Hogan <[email protected]> Cc: Michal Simek <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: David Daney <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Sam Ravnborg <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: "H. Peter Anvin" <[email protected]> --- include/linux/mm.h | 7 +++++++ mm/page_alloc.c | 9 +++++++++ 2 files changed, 16 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index d75c14b..f2fb750 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1303,6 +1303,13 @@ extern void free_initmem(void); */ extern unsigned long free_reserved_area(unsigned long start, unsigned long end, int poison, char *s); +#ifdef CONFIG_HIGHMEM +/* + * Free a highmem page into the buddy system, adjusting totalhigh_pages + * and totalram_pages. + */ +extern void free_highmem_page(struct page *page); +#endif static inline void adjust_managed_page_count(struct page *page, long count) { diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0fadb09..37bc8ab 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5133,6 +5133,15 @@ unsigned long free_reserved_area(unsigned long start, unsigned long end, return pages; } +#ifdef CONFIG_HIGHMEM +void free_highmem_page(struct page *page) +{ + __free_reserved_page(page); + totalram_pages++; + totalhigh_pages++; +} +#endif + /** * set_dma_reserve - set the specified number of pages reserved in the first zone * @new_dma_reserve: The number of pages to mark reserved -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
