m68k: implement flush_icache_user_range

Rename the current flush_icache_range to flush_icache_user_range as per
commit ae92ef8a ("PATCH] flush icache in correct context") there
seems to be an assumption that it operates on user addresses.  Add a
flush_icache_range around it that for now is a no-op.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Link: http://lkml.kernel.org/r/20200515143646.3857579-25-hch@lst.deSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/m68k/include/asm/cacheflush_mm.h

@@ -257,6 +257,8 @@ static inline void __flush_page_to_ram(void *vaddr)
 extern void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
 				    unsigned long addr, int len);
 extern void flush_icache_range(unsigned long address, unsigned long endaddr);
+extern void flush_icache_user_range(unsigned long address,
+		unsigned long endaddr);
 
 static inline void copy_to_user_page(struct vm_area_struct *vma,
 				     struct page *page, unsigned long vaddr,

arch/m68k/mm/cache.c

@@ -73,7 +73,7 @@ static unsigned long virt_to_phys_slow(unsigned long vaddr)
 
 /* Push n pages at kernel virtual address and clear the icache */
 /* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
-void flush_icache_range(unsigned long address, unsigned long endaddr)
+void flush_icache_user_range(unsigned long address, unsigned long endaddr)
 {
 	if (CPU_IS_COLDFIRE) {
 		unsigned long start, end;
@@ -104,6 +104,11 @@ void flush_icache_range(unsigned long address, unsigned long endaddr)
 			      : "di" (FLUSH_I));
 	}
 }
+
+void flush_icache_range(unsigned long address, unsigned long endaddr)
+{
+	flush_icache_user_range(address, endaddr);
+}
 EXPORT_SYMBOL(flush_icache_range);
 
 void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,