Messages in this thread | | | Date | Sat, 25 Dec 2004 22:15:57 +0100 (CET) | From | Jesper Juhl <> | Subject | Re: [PATCH] fix inlining related build failures in mxser.c |
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On Sat, 25 Dec 2004, Jan Engelhardt wrote:
> >>>> Add -funit-at-a-time to the CFLAGS, and the compiler is happy. > >>>> > >>> But, does unit-at-a-time work reliably for all compilers on all archs back > >>> to and including gcc 2.95.3 ? > >> > >>Unit-at-a-time is only available in GCC 3.4 and above. > > No, it's already in my 3.3.0 (SUSE Linux 8.2) and continues to exist in 3.3.3 > (9.2) > > >The problem with unit-at-a-time isn't compiler availability, > >but the fact that at least with gcc-3.4 on x86 it causes > >significant stack usage increases, which in the kernel lead > >to stack overflow problems. This is not a theoretical issue, > >the overflows have been observed in normal kernels. > > > >So wrt inlining failures, the correct fix is to remove the > >inlines or rearrange the code to allow inlining w/o unit-at-a-time. > > Or making some pressure on gcc developers to fix the increase. > But that won't do people using older gcc's to build the kernel any good.
-- Jesper Juhl
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