csky: Remove unnecessary flush_icache_* implementation

The abiv2 CPUs are all PIPT cache, so there is no need to implement
flush_icache_page function.

The function flush_icache_user_range hasn't been used, so just
remove it.

The function flush_cache_range is not necessary for PIPT cache when
tlb mapping changed.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>

arch/csky/abiv1/inc/abi/cacheflush.h

@@ -49,9 +49,6 @@ extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, u
 #define flush_icache_page(vma, page)		do {} while (0);
 #define flush_icache_range(start, end)		cache_wbinv_range(start, end)
 
-#define flush_icache_user_range(vma,page,addr,len) \
-	flush_dcache_page(page)
-
 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 do { \
 	memcpy(dst, src, len); \

arch/csky/abiv2/cacheflush.c

@@ -6,29 +6,6 @@
 #include <linux/mm.h>
 #include <asm/cache.h>
 
-void flush_icache_page(struct vm_area_struct *vma, struct page *page)
-{
-	unsigned long start;
-
-	start = (unsigned long) kmap_atomic(page);
-
-	cache_wbinv_range(start, start + PAGE_SIZE);
-
-	kunmap_atomic((void *)start);
-}
-
-void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
-			     unsigned long vaddr, int len)
-{
-	unsigned long kaddr;
-
-	kaddr = (unsigned long) kmap_atomic(page) + (vaddr & ~PAGE_MASK);
-
-	cache_wbinv_range(kaddr, kaddr + len);
-
-	kunmap_atomic((void *)kaddr);
-}
-
 void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
 		      pte_t *pte)
 {

arch/csky/abiv2/inc/abi/cacheflush.h

@@ -13,25 +13,16 @@
 #define flush_cache_all()			do { } while (0)
 #define flush_cache_mm(mm)			do { } while (0)
 #define flush_cache_dup_mm(mm)			do { } while (0)
-
-#define flush_cache_range(vma, start, end) \
-	do { \
-		if (vma->vm_flags & VM_EXEC) \
-			icache_inv_all(); \
-	} while (0)
-
+#define flush_cache_range(vma, start, end)	do { } while (0)
 #define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
 #define flush_dcache_page(page)			do { } while (0)
 #define flush_dcache_mmap_lock(mapping)		do { } while (0)
 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
+#define flush_icache_page(vma, page)		do { } while (0)
 
 #define flush_icache_range(start, end)		cache_wbinv_range(start, end)
 
-void flush_icache_page(struct vm_area_struct *vma, struct page *page);
-void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
-			     unsigned long vaddr, int len);
-
 #define flush_cache_vmap(start, end)		do { } while (0)
 #define flush_cache_vunmap(start, end)		do { } while (0)