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| author | Leann Ogasawara <leann.ogasawara@canonical.com> | 2011-05-05 06:51:39 -0700 |
|---|---|---|
| committer | Xavier Boudet <x-boudet@ti.com> | 2012-04-11 18:45:00 +0200 |
| commit | 77bddf996e63edcb45f36b2375ee313689edd8b6 (patch) | |
| tree | 886d7afc1485c2f7005c78d3006d5dabd32f549a | |
| parent | c3e7bab22d8ec3badb9a6b2bba11ebdbbc9027fa (diff) | |
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>
| -rw-r--r-- | arch/arm/include/asm/div64.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/include/asm/div64.h b/arch/arm/include/asm/div64.h index d3f0a9eee9f6..0445d361371e 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 */ \ |