---

yaml --- r: 98154 b: refs/heads/master c: c9c5023 h: refs/heads/master v: v3
git-mirror · Jun 16, 2008 · 75593d9 · 75593d9
1 parent 8f602bc
commit 75593d9
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Showing 2 changed files with 6 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0c3bd83b0974238a5808d342663c6407512564d0
+refs/heads/master: c9c5023d83df5dc7d58830a63fd0e082120f00e3
diff --git a/trunk/arch/mips/mm/c-r4k.c b/trunk/arch/mips/mm/c-r4k.c
@@ -446,6 +446,7 @@ static inline void local_r4k_flush_cache_page(void *args)
 	struct page *page = pfn_to_page(fcp_args->pfn);
 	int exec = vma->vm_flags & VM_EXEC;
 	struct mm_struct *mm = vma->vm_mm;
+	int map_coherent = 0;
 	pgd_t *pgdp;
 	pud_t *pudp;
 	pmd_t *pmdp;
@@ -479,7 +480,9 @@ static inline void local_r4k_flush_cache_page(void *args)
 		 * Use kmap_coherent or kmap_atomic to do flushes for
 		 * another ASID than the current one.
 		 */
-		if (cpu_has_dc_aliases)
+		map_coherent = (cpu_has_dc_aliases &&
+				page_mapped(page) && !Page_dcache_dirty(page));
+		if (map_coherent)
 			vaddr = kmap_coherent(page, addr);
 		else
 			vaddr = kmap_atomic(page, KM_USER0);
@@ -502,7 +505,7 @@ static inline void local_r4k_flush_cache_page(void *args)
 	}
 
 	if (vaddr) {
-		if (cpu_has_dc_aliases)
+		if (map_coherent)
 			kunmap_coherent();
 		else
 			kunmap_atomic(vaddr, KM_USER0);