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SubjectRe: [PATCH 5/7] gcov: add gcov profiling infrastructure
On Fri, May 23, 2008 at 12:11:36AM -0700, Andrew Morton wrote:

> On Mon, 19 May 2008 10:44:22 +0200 Peter Oberparleiter <peter.oberparleiter@de.ibm.com> wrote:
>
> > + Note that a kernel compiled with profiling flags will be significantly
> > + larger and run slower. Also be sure to exclude files from profiling
> > + which are not linked to the kernel image to prevent linker errors.
>
> heh, it was all too much for mips.
>
> {standard input}: Assembler messages:
> {standard input}:2716: Error: Branch out of range
> {standard input}:2819: Error: Branch out of range
> {standard input}:2884: Error: Branch out of range
> {standard input}:3032: Error: Branch out of range
> {standard input}:3097: Error: Branch out of range
> {standard input}:3151: Error: Branch out of range
> {standard input}:3216: Error: Branch out of range
> make[1]: *** [drivers/telephony/ixj.o] Error 1
> make: *** [drivers/telephony/ixj.o] Error 2

A known problem which I had decieded to ignore until it begins to actually
bite. It's triggered by something like this

__asm__ __volatile__(
" .set mips3 \n"
"1: ll %0, %1 # atomic_add \n"
" addu %0, %2 \n"
" sc %0, %1 \n"
" beqz %0, 2f \n"
" .subsection 2 \n"
"2: b 1b \n"
" .previous \n"
" .set mips0 \n"
: "=&r" (temp), "=m" (v->counter)
: "Ir" (i), "m" (v->counter));

when compiled into a large compilation unit.

Ralf


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