m68k: Remove the 030 case in virt_to_phys_slow

The 030 case in virt_to_phys_slow can't ever be reached, so remove it.

Suggested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-3-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/mm/cache.c b/arch/m68k/mm/cache.c
index b486c08..e7c1cab 100644 (file)
--- a/arch/m68k/mm/cache.c
+++ b/arch/m68k/mm/cache.c
@@ -49,24 +49,7 @@ static unsigned long virt_to_phys_slow(unsigned long vaddr)
                if (mmusr & MMU_R_040)
                        return (mmusr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
        } else {
-               unsigned short mmusr;
-               unsigned long *descaddr;
-
-               asm volatile ("ptestr %3,%2@,#7,%0\n\t"
-                             "pmove %%psr,%1"
-                             : "=a&" (descaddr), "=m" (mmusr)
-                             : "a" (vaddr), "d" (get_fs().seg));
-               if (mmusr & (MMU_I|MMU_B|MMU_L))
-                       return 0;
-               descaddr = phys_to_virt((unsigned long)descaddr);
-               switch (mmusr & MMU_NUM) {
-               case 1:
-                       return (*descaddr & 0xfe000000) | (vaddr & 0x01ffffff);
-               case 2:
-                       return (*descaddr & 0xfffc0000) | (vaddr & 0x0003ffff);
-               case 3:
-                       return (*descaddr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
-               }
+               WARN_ON_ONCE(!CPU_IS_040_OR_060);
        }
        return 0;
 }