--- zzzz-none-000/linux-3.10.107/arch/mips/include/asm/cacheflush.h	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/arch/mips/include/asm/cacheflush.h	2021-11-10 11:53:53.000000000 +0000
@@ -51,35 +51,35 @@
 
 #define ARCH_HAS_FLUSH_ANON_PAGE
 extern void __flush_anon_page(struct page *, unsigned long);
-static inline void flush_anon_page(struct vm_area_struct *vma,
+static inline void flush_anon_page(struct vm_area_struct *vma __maybe_unused,
 	struct page *page, unsigned long vmaddr)
 {
 	if (cpu_has_dc_aliases && PageAnon(page))
 		__flush_anon_page(page, vmaddr);
 }
 
-static inline void flush_icache_page(struct vm_area_struct *vma,
-	struct page *page)
+static inline void flush_icache_page(struct vm_area_struct *vma __maybe_unused,
+	struct page *page __maybe_unused)
 {
 }
 
 extern void (*flush_icache_range)(unsigned long start, unsigned long end);
 extern void (*local_flush_icache_range)(unsigned long start, unsigned long end);
 
-extern void (*__flush_cache_vmap)(void);
+extern void (*__flush_cache_vmap)(unsigned long start, unsigned long end);
 
 static inline void flush_cache_vmap(unsigned long start, unsigned long end)
 {
 	if (cpu_has_dc_aliases)
-		__flush_cache_vmap();
+		__flush_cache_vmap(start,end);
 }
 
-extern void (*__flush_cache_vunmap)(void);
+extern void (*__flush_cache_vunmap)(unsigned long start, unsigned long end);
 
 static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
 {
 	if (cpu_has_dc_aliases)
-		__flush_cache_vunmap();
+		__flush_cache_vunmap(start,end);
 }
 
 extern void copy_to_user_page(struct vm_area_struct *vma,
@@ -94,6 +94,8 @@
 extern void (*flush_icache_all)(void);
 extern void (*local_flush_data_cache_page)(void * addr);
 extern void (*flush_data_cache_page)(unsigned long addr);
+extern void (*mips_flush_data_cache_range)(struct vm_area_struct *vma,
+	struct page *page, unsigned long addr, unsigned long size);
 
 /*
  * This flag is used to indicate that the page pointed to by a pte
@@ -117,7 +119,8 @@
 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
 static inline void flush_kernel_dcache_page(struct page *page)
 {
-	BUG_ON(cpu_has_dc_aliases && PageHighMem(page));
+	if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
+		__flush_dcache_page(page);
 }
 
 /*