On Fri, 2008-10-17 at 09:02 -0500, Nate Case wrote:
> > With this patch it compiles and boots fine.
> > The option -mabi=no-spe is not required.
>
> Please don't accept this patch yet. My past testing showed that
> "-mabi=no-spe" was required for my toolchain. I'll go back and double
> check though.
OK, I went back and re-tested.
Kernel: 2.6.27
CPU: MPC8572
Toolchain:
Cross-compiler built using crosstool-ng
gcc 4.3.1, default target CFLAGS include '-mabi=spe -mspe'
binutils 2.18.90 snapshot (built with --enable-spe=yes)
Kbuild flags Result
------------ ------
-mno-spe (*) FAILED
-mno-spe -mabi=no-spe FAILED
-mno-spe -mspe=no OK
-mspe=no OK
(*) 2.6.27 default
In the failure case, the kernel would repeatedly dump out "SPE used in
kernel (task=xxxxxxxx, pc=xxxxxxxx)".
I think I was fooled before because I added _both_ "-mspe=no" and
"-mabi=no-spe" to my KBUILD_CFLAGS and saw the problem go away. Since I
trusted the documentation that -mspe=no and -mno-spe were the same, I
assumed that -mabi=no-spe was the key.
So, I've changed my mind. I now agree with Sebastian that
"-mabi=no-spe" is not required. "-mno-spe -mspe=no" is probably the
safe way to go.
--
Nate Case <[EMAIL PROTECTED]>
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