From 30fb8a7141e906116bb536dd54be99480b8fd238 Mon Sep 17 00:00:00 2001 From: Nitin Gupta Date: Sat, 12 Dec 2009 11:44:46 +0530 Subject: [PATCH] Staging: ramzswap: remove ARM specific d-cache hack Remove d-cache hack in ramzswap driver that was needed to workaround a bug in ARM version of update_mmu_cache() which caused stale data in d-cache to be transferred to userspace. This bug was fixed by git commit: 787b2faadc4356b6c2c71feb42fb944fece9a12f This also brings down one entry in TODO file. Signed-off-by: Nitin Gupta Acked-by: Pekka Enberg Signed-off-by: Greg Kroah-Hartman --- drivers/staging/ramzswap/TODO | 1 - drivers/staging/ramzswap/ramzswap_drv.c | 28 +++---------------------- 2 files changed, 3 insertions(+), 26 deletions(-) diff --git a/drivers/staging/ramzswap/TODO b/drivers/staging/ramzswap/TODO index bac40d6cb9f1..8d64e28fac0e 100644 --- a/drivers/staging/ramzswap/TODO +++ b/drivers/staging/ramzswap/TODO @@ -1,6 +1,5 @@ TODO: - Add support for swap notifiers - - Remove CONFIG_ARM hack Please send patches to Greg Kroah-Hartman and Nitin Gupta diff --git a/drivers/staging/ramzswap/ramzswap_drv.c b/drivers/staging/ramzswap/ramzswap_drv.c index b839f05efbce..989fac5b01b3 100644 --- a/drivers/staging/ramzswap/ramzswap_drv.c +++ b/drivers/staging/ramzswap/ramzswap_drv.c @@ -222,28 +222,6 @@ static int setup_swap_header(struct ramzswap *rzs, union swap_header *s) return ret; } -static void ramzswap_flush_dcache_page(struct page *page) -{ -#ifdef CONFIG_ARM - int flag = 0; - /* - * Ugly hack to get flush_dcache_page() work on ARM. - * page_mapping(page) == NULL after clearing this swap cache flag. - * Without clearing this flag, flush_dcache_page() will simply set - * "PG_dcache_dirty" bit and return. - */ - if (PageSwapCache(page)) { - flag = 1; - ClearPageSwapCache(page); - } -#endif - flush_dcache_page(page); -#ifdef CONFIG_ARM - if (flag) - SetPageSwapCache(page); -#endif -} - void ramzswap_ioctl_get_stats(struct ramzswap *rzs, struct ramzswap_ioctl_stats *s) { @@ -655,7 +633,7 @@ static int handle_zero_page(struct bio *bio) memset(user_mem, 0, PAGE_SIZE); kunmap_atomic(user_mem, KM_USER0); - ramzswap_flush_dcache_page(page); + flush_dcache_page(page); set_bit(BIO_UPTODATE, &bio->bi_flags); bio_endio(bio, 0); @@ -679,7 +657,7 @@ static int handle_uncompressed_page(struct ramzswap *rzs, struct bio *bio) kunmap_atomic(user_mem, KM_USER0); kunmap_atomic(cmem, KM_USER1); - ramzswap_flush_dcache_page(page); + flush_dcache_page(page); set_bit(BIO_UPTODATE, &bio->bi_flags); bio_endio(bio, 0); @@ -779,7 +757,7 @@ static int ramzswap_read(struct ramzswap *rzs, struct bio *bio) goto out; } - ramzswap_flush_dcache_page(page); + flush_dcache_page(page); set_bit(BIO_UPTODATE, &bio->bi_flags); bio_endio(bio, 0);