[ARM] 5320/1: fix assembly constraints in implementation of do_div()

Those inline assembly segments using the umlal instruction must have
the & modifier so to be sure that a purely input register won't alias
one of the registers used as input+output.  In most cases, the inputs
are still used after the outputs are touched, and most binutil versions
insist on "rdhi, rdlo and rm must all be different" even for ARMv6+.

Signed-off-by: Nicolas Pitre <[email protected]>
Signed-off-by: Russell King <[email protected]>

Author: Nicolas Pitre

arch/arm/include/asm/div64.h

@@ -165,7 +165,7 @@
 			__res = __m;					\
 			asm (	"umlal	%Q0, %R0, %Q1, %Q2\n\t"		\
 				"mov	%Q0, #0"			\
-				: "+r" (__res)				\
+				: "+&r" (__res)				\
 				: "r" (__m), "r" (__n)			\
 				: "cc" );				\
 		} else {						\
@@ -182,7 +182,7 @@
 				"umlal	%R0, %Q0, %Q1, %R2\n\t"		\
 				"mov	%R0, #0\n\t"			\
 				"umlal	%Q0, %R0, %R1, %R2"		\
-				: "+r" (__res)				\
+				: "+&r" (__res)				\
 				: "r" (__m), "r" (__n)			\
 				: "cc" );				\
 		} else {						\
@@ -192,7 +192,7 @@
 				"adds	%Q0, %1, %Q0\n\t"		\
 				"adc	%R0, %R0, #0\n\t"		\
 				"umlal	%Q0, %R0, %R2, %R3"		\
-				: "+r" (__res), "+r" (__z)		\
+				: "+&r" (__res), "+&r" (__z)		\
 				: "r" (__m), "r" (__n)			\
 				: "cc" );				\
 		}							\