UBUNTU: SAUCE: [arm] fixup __aeabi_uldivmod undefined build error

When building on arm we run into the following build error due to
gcc-4.6 optimizing do_div into a uldivmod call:

ERROR: "__aeabi_uldivmod" [drivers/scsi/megaraid/megaraid_sas.ko] undefined!

Inline some assembly to prevent the compiler optimization.

Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/arm/include/asm/div64.h b/arch/arm/include/asm/div64.h
index d3f0a9eee9f..0445d361371 100644
--- a/arch/arm/include/asm/div64.h
+++ b/arch/arm/include/asm/div64.h
@@ -73,6 +73,7 @@
 #define do_div(n, base)                                                 \
 ({                                                                      \
         unsigned int __r, __b = (base);                                 \
+        asm("" : "+r" (__b));                                           \
         if (!__builtin_constant_p(__b) || __b == 0 ||                   \
             (__LINUX_ARM_ARCH__ < 4 && (__b & (__b - 1)) != 0)) {       \
                 /* non-constant divisor (or zero): slow path */         \