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SubjectRe: 2.2.2 Alpha SMP - compilation problem with __down_trylock
Alex,

> Here, Alpha LX164, SMP, kernel 2.2.2:
The most recent kernel (Alan Cox patches excluded) that compiles
straight on the Alpha is 2.2.2pre4. 2.2.2pre5 introduced IA32-specific
semaphores into ksyms.c and other kernel/ files.
> gcc -D__KERNEL__ -I/usr/src/linux-2.2.2/include -Wall -Wstrict-prototypes
> -O2 -fomit-frame-pointer -D__SMP__ -pipe -mno-fp-regs -ffixed-8 -mcpu=ev56
> -Wa,-mev6 -DEXPORT_SYMTAB -c ksyms.c
> ksyms.c:375: `__down_trylock' undeclared here (not in a function)
> ksyms.c:375: initializer element for `__ksymtab___down_trylock.value' is not
> constant
> make[2]: *** [ksyms.o] Error 1
> make[2]: Leaving directory `/usr/src/linux-2.2.2/kernel'
> make[1]: *** [first_rule] Error 2
> make[1]: Leaving directory `/usr/src/linux-2.2.2/kernel'
> make: *** [_dir_kernel] Error 2
I hope to produce a patch for 2.2.2final tonight (probably around
3am with my hectic schedule). A patch for building 2.2.2pre5 on the Alpha
is attached to this message. This has been tested on my system
(21164a EV56, DEC hardware), a single processor LX164, an EV4 Multia, and
a few other random boxes. I assume it also works for building an
SMP kernel, but have not tested it myself.

> Looks like there is no down_trylock in ./include/asm-alpha/semaphore.h
> at all (unlike the intel-specific one).
Right, we are aware of this. I corresponded with Dave Miller
(sparc64 guru) on this last night, and he pointed me in the right direction
for working on axp semaphores.

Regards,
Daniel
--
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