m68k: implement flush_icache_user_range

Rename the current flush_icache_range to flush_icache_user_range as per
commit ae92ef8a4424 ("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.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/m68k/include/asm/cacheflush_mm.h b/arch/m68k/include/asm/cacheflush_mm.h
index 95376bf..1ac55e7 100644 (file)
--- a/arch/m68k/include/asm/cacheflush_mm.h
+++ b/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,

diff --git a/arch/m68k/mm/cache.c b/arch/m68k/mm/cache.c
index 99057cd..7915be3 100644 (file)
--- a/arch/m68k/mm/cache.c
+++ b/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,