[ARM] 3488/1: make icedcc_putc do the right thing

Patch from Uwe Zeisberger

 a) use coprocessor 14
 b) make reading the dcc status volatile

Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c
index 0af3772efcb79c56e0e08f4659fed0292071c427..ace3fb5835d9278833a0c539b8fff0b74e8af885 100644 (file)
--- a/arch/arm/boot/compressed/misc.c
+++ b/arch/arm/boot/compressed/misc.c
@@ -38,10 +38,10 @@ static void icedcc_putc(int ch)
                if (--i < 0)
                        return;
 
-               asm("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
+               asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
        } while (status & 2);
 
-       asm("mcr p15, 0, %0, c1, c0, 0" : : "r" (ch));
+       asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
 }
 
 #define putc(ch)       icedcc_putc(ch)