diff options
Diffstat (limited to 'arch/arm/mm/copypage-v6.c')
| -rw-r--r-- | arch/arm/mm/copypage-v6.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c index 4127a7bddfe5..8bca4dea6dfa 100644 --- a/arch/arm/mm/copypage-v6.c +++ b/arch/arm/mm/copypage-v6.c @@ -34,13 +34,21 @@ static DEFINE_SPINLOCK(v6_lock); * attack the kernel's existing mapping of these pages. */ static void v6_copy_user_highpage_nonaliasing(struct page *to, - struct page *from, unsigned long vaddr) + struct page *from, unsigned long vaddr, struct vm_area_struct *vma) { void *kto, *kfrom; kfrom = kmap_atomic(from, KM_USER0); kto = kmap_atomic(to, KM_USER1); copy_page(kto, kfrom); +#ifdef CONFIG_HIGHMEM + /* + * kmap_atomic() doesn't set the page virtual address, and + * kunmap_atomic() takes care of cache flushing already. + */ + if (page_address(to) != NULL) +#endif + __cpuc_flush_dcache_area(kto, PAGE_SIZE); kunmap_atomic(kto, KM_USER1); kunmap_atomic(kfrom, KM_USER0); } @@ -73,7 +81,7 @@ static void discard_old_kernel_data(void *kto) * Copy the page, taking account of the cache colour. */ static void v6_copy_user_highpage_aliasing(struct page *to, - struct page *from, unsigned long vaddr) + struct page *from, unsigned long vaddr, struct vm_area_struct *vma) { unsigned int offset = CACHE_COLOUR(vaddr); unsigned long kfrom, kto; |