From mboxrd@z Thu Jan 1 00:00:00 1970 From: steve.capper@linaro.org (Steve Capper) Date: Mon, 16 Dec 2013 15:03:43 +0000 Subject: [PATCH V2] arm: mm: fix dcache flush logic for compound high pages Message-ID: <1387206223-1670-1-git-send-email-steve.capper@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org When given a compound high page, __flush_dcache_page will only flush the first page of the compound page repeatedly rather than the entire set of constituent pages. This patch corrects the logic such that all constituent pages are now flushed. Signed-off-by: Steve Capper --- V2: style change use page + i rather than separate struct *cpage --- arch/arm/mm/flush.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c index 6d5ba9a..3387e60 100644 --- a/arch/arm/mm/flush.c +++ b/arch/arm/mm/flush.c @@ -175,16 +175,16 @@ void __flush_dcache_page(struct address_space *mapping, struct page *page) unsigned long i; if (cache_is_vipt_nonaliasing()) { for (i = 0; i < (1 << compound_order(page)); i++) { - void *addr = kmap_atomic(page); + void *addr = kmap_atomic(page + i); __cpuc_flush_dcache_area(addr, PAGE_SIZE); kunmap_atomic(addr); } } else { for (i = 0; i < (1 << compound_order(page)); i++) { - void *addr = kmap_high_get(page); + void *addr = kmap_high_get(page + i); if (addr) { __cpuc_flush_dcache_area(addr, PAGE_SIZE); - kunmap_high(page); + kunmap_high(page + i); } } } -- 1.8.1.4