kernel/sched.c gets compiled with -fno-omit-frame-pointer, and this was

already done in kernel 1.0 (sic).
Later, it has been modified to be this way only on some architectures.
It might not be an earthshaking amount, but removing it saves some

bytes, and there's no visible breakage when running the modified kernel

on i386.
$ ls -la kernel/sched.o*

-rw-rw-r-- 1 bunk bunk 25600 2007-08-19 16:10 kernel/sched.o

-rw-rw-r-- 1 bunk bunk 26084 2007-08-19 16:03 kernel/sched.o.old

$ size kernel/sched.o*

   text    data     bss     dec     hex filename

  11835     184    2000   14019    36c3 kernel/sched.o

  12321     184    2000   14505    38a9 kernel/sched.o.old

$ 
Is the -fno-omit-frame-pointer still required for some reason, or is

this a relict that could be removed?
cu

Adrian
-- 
       "Is there not promise of rain?" Ling Tan asked suddenly out

        of the darkness. There had been need of rain for many days.

       "Only a promise," Lao Er said.

                                       Pearl S. Buck - Dragon Seed
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It's needed so that the WCHAN /proc display can backtrace one

level up out of schedule()
-Andi

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it's not just one level - we'll back out until we are in scheduler

functions (up to 16 levels). So it will back out of io_schedule() and

other functions as well.
	Ingo

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vague memory: this was needed for wchan to work properly
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