NET: am79c961: fix assembler warnings

Fix:
/tmp/ccvoZ6h8.s: Assembler messages:
/tmp/ccvoZ6h8.s:284: Warning: register range not in ascending order
/tmp/ccvoZ6h8.s:881: Warning: register range not in ascending order
/tmp/ccvoZ6h8.s:1087: Warning: register range not in ascending order

by ensuring that we have temporary variables placed into specific
registers.  Reorder the code a bit to allow the resulting assembly
to be slightly more optimal.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/arm/am79c961a.c b/drivers/net/arm/am79c961a.c
index 79d88a0..7b3e23f 100644 (file)
--- a/drivers/net/arm/am79c961a.c
+++ b/drivers/net/arm/am79c961a.c
@@ -91,40 +91,41 @@ static inline unsigned short read_ireg(u_long base_addr, u_int reg)
 #define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1))
 #define am_readword(dev,off)      __raw_readw(ISAMEM_BASE + ((off) << 1))
 
-static inline void
+static void
 am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
 {
        offset = ISAMEM_BASE + (offset << 1);
        length = (length + 1) & ~1;
        if ((int)buf & 2) {
-               __asm__ __volatile__("str%?h    %2, [%0], #4"
+               asm volatile("str%?h    %2, [%0], #4"
                 : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
                buf += 2;
                length -= 2;
        }
        while (length > 8) {
-               unsigned int tmp, tmp2;
-               __asm__ __volatile__(
-                       "ldm%?ia        %1!, {%2, %3}\n\t"
+               register unsigned int tmp asm("r2"), tmp2 asm("r3");
+               asm volatile(
+                       "ldm%?ia        %0!, {%1, %2}"
+                       : "+r" (buf), "=&r" (tmp), "=&r" (tmp2));
+               length -= 8;
+               asm volatile(
+                       "str%?h %1, [%0], #4\n\t"
+                       "mov%?  %1, %1, lsr #16\n\t"
+                       "str%?h %1, [%0], #4\n\t"
                        "str%?h %2, [%0], #4\n\t"
                        "mov%?  %2, %2, lsr #16\n\t"
-                       "str%?h %2, [%0], #4\n\t"
-                       "str%?h %3, [%0], #4\n\t"
-                       "mov%?  %3, %3, lsr #16\n\t"
-                       "str%?h %3, [%0], #4"
-               : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2)
-               : "0" (offset), "1" (buf));
-               length -= 8;
+                       "str%?h %2, [%0], #4"
+               : "+r" (offset), "=&r" (tmp), "=&r" (tmp2));
        }
        while (length > 0) {
-               __asm__ __volatile__("str%?h    %2, [%0], #4"
+               asm volatile("str%?h    %2, [%0], #4"
                 : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
                buf += 2;
                length -= 2;
        }
 }
 
-static inline void
+static void
 am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
 {
        offset = ISAMEM_BASE + (offset << 1);
@@ -140,12 +141,12 @@ am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned
                length -= 2;
        }
        while (length > 8) {
-               unsigned int tmp, tmp2, tmp3;
+               register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3;
                asm volatile(
                        "ldr%?h %2, [%0], #4\n\t"
+                       "ldr%?h %4, [%0], #4\n\t"
                        "ldr%?h %3, [%0], #4\n\t"
-                       "orr%?  %2, %2, %3, lsl #16\n\t"
-                       "ldr%?h %3, [%0], #4\n\t"
+                       "orr%?  %2, %2, %4, lsl #16\n\t"
                        "ldr%?h %4, [%0], #4\n\t"
                        "orr%?  %3, %3, %4, lsl #16\n\t"
                        "stm%?ia        %1!, {%2, %3}"