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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> | 2012-07-10 17:26:58 +0200 |
| commit | f957d278eadd2893cd34aff222e350d15bd53a4e (patch) | |
| tree | 18de25b41cb48cafb0ca7a8f1ff6a925c57d12b6 | |
| parent | 0dfcf692e71a85e35f7f706a0f8d37dddbf45839 (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 fe92ccf1d0b0..2dedab7ae089 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 */ \ |