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>
TODO:
- Add support for swap notifiers
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>
Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
Nitin Gupta <ngupta@vflare.org>
-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)
{
void ramzswap_ioctl_get_stats(struct ramzswap *rzs,
struct ramzswap_ioctl_stats *s)
{
memset(user_mem, 0, PAGE_SIZE);
kunmap_atomic(user_mem, KM_USER0);
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);
set_bit(BIO_UPTODATE, &bio->bi_flags);
bio_endio(bio, 0);
kunmap_atomic(user_mem, KM_USER0);
kunmap_atomic(cmem, KM_USER1);
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);
set_bit(BIO_UPTODATE, &bio->bi_flags);
bio_endio(bio, 0);
- ramzswap_flush_dcache_page(page);
+ flush_dcache_page(page);
set_bit(BIO_UPTODATE, &bio->bi_flags);
bio_endio(bio, 0);
set_bit(BIO_UPTODATE, &bio->bi_flags);
bio_endio(bio, 0);