Messages in this thread Patch in this message | | | Subject | patch staging-ramzswap-remove-arm-specific-d-cache-hack.patch added to gregkh-2.6 tree | From | <> | Date | Fri, 18 Dec 2009 11:33:47 -0800 |
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This is a note to let you know that I've just added the patch titled
Subject: Staging: ramzswap: remove ARM specific d-cache hack
to my gregkh-2.6 tree. Its filename is
staging-ramzswap-remove-arm-specific-d-cache-hack.patch
This tree can be found at http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
From ngupta@vflare.org Fri Dec 18 10:22:00 2009 From: Nitin Gupta <ngupta@vflare.org> Date: Sat, 12 Dec 2009 11:44:46 +0530 Subject: Staging: ramzswap: remove ARM specific d-cache hack To: Greg KH <greg@kroah.com> Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel <linux-kernel@vger.kernel.org> Message-ID: <1260598486-12623-1-git-send-email-ngupta@vflare.org>
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 <ngupta@vflare.org> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/staging/ramzswap/TODO | 1 - drivers/staging/ramzswap/ramzswap_drv.c | 28 +++------------------------- 2 files changed, 3 insertions(+), 26 deletions(-)
--- a/drivers/staging/ramzswap/ramzswap_drv.c +++ b/drivers/staging/ramzswap/ramzswap_drv.c @@ -222,28 +222,6 @@ out: 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 * 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(stru 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 goto out; } - ramzswap_flush_dcache_page(page); + flush_dcache_page(page); set_bit(BIO_UPTODATE, &bio->bi_flags); bio_endio(bio, 0); --- 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 <greg@kroah.com> and Nitin Gupta <ngupta@vflare.org>
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