s390/ebcdic: Fix length decrement in codepage_convert()

The inline assembly uses the ahi instruction to decrement and test
whether more than 256 bytes are left for conversion. But the nr
variable passed is of type unsigned long. Therefore use aghi.

Signed-off-by: Sven Schnelle <[email protected]>
Reported-by: Jens Remus <[email protected]>
Reviewed-by: Heiko Carstens <[email protected]>
Signed-off-by: Alexander Gordeev <[email protected]>

Author: svens-s390

arch/s390/include/asm/ebcdic.h

@@ -29,7 +29,7 @@ codepage_convert(const __u8 *codepage, volatile char *addr, unsigned long nr)
 		"0:	tr	0(1,%0),0(%2)\n"
 		"1:	tr	0(256,%0),0(%2)\n"
 		"	la	%0,256(%0)\n"
-		"2:	ahi	%1,-256\n"
+		"2:	aghi	%1,-256\n"
 		"	jnm	1b\n"
 		"	exrl	%1,0b"
 		: "+&a" (addr), "+&a" (nr)