[PATCH 6/8] ARM: Implement copy_to_user_page() for noMMU
Catalin Marinas
catalin.marinas at arm.com
Tue May 4 12:44:48 EDT 2010
Commit 7959722 introduced calls to copy_(to|from)_user_page() from
access_process_vm() in mm/nommu.c. The copy_to_user_page() was not
implemented on noMMU ARM.
Signed-off-by: Catalin Marinas <catalin.marinas at arm.com>
---
arch/arm/mm/nommu.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index f8791ee..33b3273 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -65,6 +65,15 @@ void flush_dcache_page(struct page *page)
}
EXPORT_SYMBOL(flush_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)
+{
+ memcpy(dst, src, len);
+ if (vma->vm_flags & VM_EXEC)
+ __cpuc_coherent_user_range(uaddr, uaddr + len);
+}
+
void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
size_t size, unsigned int mtype)
{
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