Blackfin arch: make sure the BSS and kernel load address are 4 byte aligned

Signed-off-by: NMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>

arch/blackfin/kernel/vmlinux.lds.S

@@ -83,6 +83,7 @@ SECTIONS
 #if !L1_DATA_B_LENGTH
 		*(.l1.bss.B)
 #endif
+		. = ALIGN(4);
 		___bss_stop = .;
 	}
 

arch/blackfin/mach-common/arch_checks.c

@@ -27,6 +27,7 @@
  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
+#include <asm/fixed_code.h>
 #include <asm/mach/anomaly.h>
 #include <asm/mach-common/clocks.h>
 
@@ -53,3 +54,11 @@
 # endif
 
 #endif /* CONFIG_BFIN_KERNEL_CLOCK */
+
+#if CONFIG_BOOT_LOAD < FIXED_CODE_END
+# error "The kernel load address must be after the fixed code section"
+#endif
+
+#if (CONFIG_BOOT_LOAD & 0x3)
+# error "The kernel load address must be 4 byte aligned"
+#endif