nds32: Flush the cache of the page at vmaddr instead of kaddr in flush_anon_page

According to Documentation/cachetlb.txt, the cache of the page at vmaddr
shall be flushed in flush_anon_page instead of the cache of the page at
page_address(page).

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Reviewed-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/arch/nds32/mm/cacheflush.c b/arch/nds32/mm/cacheflush.c
index 02f25ee39c1d..ae31cd2c21be 100644
--- a/arch/nds32/mm/cacheflush.c
+++ b/arch/nds32/mm/cacheflush.c
@@ -274,7 +274,7 @@ void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
 void flush_anon_page(struct vm_area_struct *vma,
                      struct page *page, unsigned long vaddr)
 {
-        unsigned long flags;
+        unsigned long kaddr, flags, ktmp;
         if (!PageAnon(page))
                 return;
 
@@ -284,7 +284,12 @@ void flush_anon_page(struct vm_area_struct *vma,
         local_irq_save(flags);
         if (vma->vm_flags & VM_EXEC)
                 cpu_icache_inval_page(vaddr & PAGE_MASK);
-        cpu_dcache_wbinval_page((unsigned long)page_address(page));
+        kaddr = (unsigned long)page_address(page);
+        if (aliasing(vaddr, kaddr)) {
+                ktmp = kremap0(vaddr, page_to_phys(page));
+                cpu_dcache_wbinval_page(ktmp);
+                kunmap01(ktmp);
+        }
         local_irq_restore(flags);
 }