From mboxrd@z Thu Jan 1 00:00:00 1970 From: gmbnomis@gmail.com (Simon Baatz) Date: Wed, 19 Jun 2013 22:15:10 +0200 Subject: [PATCH] ARM: fix missing flush_kernel_dcache_page() for noMMU Message-ID: <1371672910-9340-1-git-send-email-gmbnomis@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Commit 1bc3974 moved the implementation of flush_kernel_dcache_page() into in mm/flush.c but did not implement it on noMMU ARM. Signed-off-by: Simon Baatz Cc: # 3.2+: 1bc3974: ARM: 7755/1 Cc: # 3.2+ --- ARM 7755/1 "handle user space mapped pages in flush_kernel_dcache_page" unfortunately broke the no MMU case. Compile tested with allnoconfig and at91x40_defconfig on v3.10-rc6/v3.9.6 + ARM 7755/1. On older stable kernels (3.2.47 & 3.4.49) compiled with at91x40_defconfig. - Simon arch/arm/mm/nommu.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c index d51225f..eb5293a 100644 --- a/arch/arm/mm/nommu.c +++ b/arch/arm/mm/nommu.c @@ -57,6 +57,12 @@ void flush_dcache_page(struct page *page) } EXPORT_SYMBOL(flush_dcache_page); +void flush_kernel_dcache_page(struct page *page) +{ + __cpuc_flush_dcache_area(page_address(page), PAGE_SIZE); +} +EXPORT_SYMBOL(flush_kernel_dcache_page); + void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long uaddr, void *dst, const void *src, unsigned long len) -- 1.7.9.5