[ARM] Ensure machine information structures aren't optimised away

Since the machine information structures are now static, the
compiler might optimise them away.  Mark them with
__attribute_used__ to prevent this occuring.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/include/asm-arm/mach/arch.h b/include/asm-arm/mach/arch.h
index 7273c6fd95b53d39a3bae2e882c134e789030fcb..eb262e078c46edf4c126e635e4279bb73437630d 100644 (file)
--- a/include/asm-arm/mach/arch.h
+++ b/include/asm-arm/mach/arch.h
@@ -50,6 +50,7 @@ struct machine_desc {
  */
 #define MACHINE_START(_type,_name)                     \
 static const struct machine_desc __mach_desc_##_type   \
+ __attribute_used__                                    \
  __attribute__((__section__(".arch.info.init"))) = {   \
        .nr             = MACH_TYPE_##_type,            \
        .name           = _name,