csky: Enable defer flush_dcache_page for abiv2 cpus (807/810/860)

[linux-2.6-microblaze.git] / arch / csky / abiv2 / cacheflush.c

diff --git a/arch/csky/abiv2/cacheflush.c b/arch/csky/abiv2/cacheflush.c
index f64b415..ba46995 100644 (file)
--- a/arch/csky/abiv2/cacheflush.c
+++ b/arch/csky/abiv2/cacheflush.c
@@ -9,20 +9,22 @@
 void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
                      pte_t *pte)
 {
-       unsigned long addr, pfn;
+       unsigned long addr;
        struct page *page;
 
-       pfn = pte_pfn(*pte);
-       if (unlikely(!pfn_valid(pfn)))
+       page = pfn_to_page(pte_pfn(*pte));
+       if (page == ZERO_PAGE(0))
                return;
 
-       page = pfn_to_page(pfn);
-       if (page == ZERO_PAGE(0))
+       if (test_and_set_bit(PG_dcache_clean, &page->flags))
                return;
 
        addr = (unsigned long) kmap_atomic(page);
 
-       cache_wbinv_range(addr, addr + PAGE_SIZE);
+       dcache_wb_range(addr, addr + PAGE_SIZE);
+
+       if (vma->vm_flags & VM_EXEC)
+               icache_inv_range(addr, addr + PAGE_SIZE);
 
        kunmap_atomic((void *) addr);
 }