2.5.68 and SMP on arch/sparc

2.5.68 and SMP on arch/sparc

[Schwarzseher]

Hi,
out whatever reasons I'm currently trying to update a debian 
installation on an old 2 processor SparcStation 20 clone.

Unfortunately I run into trouble compiling a 2.5.68 kernel on it. It 
seems that the inline "cpu_possible" is missing out of 
include/asm-sparc/smp.h while being existent in include/asm-i386/smp.h 
and others. A
Also unfortunately it seems to be needed for compiling successfully. 
Even more unfortunately I don't have an idea on how to add it (or rather 
what to add) because I'm not so deeply involved into inner kernel 
workings or the sparc architecture.

I attached the errors below. Am I the only one who tries to ran an 
actual 2.5 testing kernel on this vintage hardware?

While in this issue (even when it's off topic for this list, so please 
ignore if you feel insulted): Does anyone have an idea why swapon 
/dev/sdc2 throws a core since I updated to a (successfully for SMP 
compiled) 2.4.20 kernel? The swapon syscall is executed and in fact the 
swapspace is added but afterwards the swapon utility hickups with an 
segmentation fault... Had a look into the source but didn't understand 
what may be happening that results into a segfault.

Regards
Schwarzseher

---8<---8<---cut here for the kernel compile errors ---8<----8<-----8<----
  gcc -Wp,-MD,init/.main.o.d -D__KERNEL__ -Iinclude -Wall 
-Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common 
-m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7 -fomit-frame-pointer 
-nostdinc -iwithprefix include    -DKBUILD_BASENAME=main 
-DKBUILD_MODNAME=main -c -o init/.tmp_main.o init/main.c
In file included from include/linux/blkdev.h:6,
                 from include/linux/blk.h:4,
                 from init/main.c:26:
include/linux/genhd.h: In function `disk_stat_set_all':
include/linux/genhd.h:140: warning: implicit declaration of function 
`cpu_possible'
In file included from include/linux/interrupt.h:10,
                 from include/asm/highmem.h:23,
                 from include/linux/highmem.h:12,
                 from include/linux/pagemap.h:10,
                 from include/linux/blkdev.h:10,
                 from include/linux/blk.h:4,
                 from init/main.c:26:
include/asm/hardirq.h: In function `irqs_running':
include/asm/hardirq.h:135: `smp_num_cpus' undeclared (first use in this 
function)
include/asm/hardirq.h:135: (Each undeclared identifier is reported only once
include/asm/hardirq.h:135: for each function it appears in.)
include/asm/hardirq.h:136: `BR_GLOBALIRQ_LOCK' undeclared (first use in 
this function)
include/asm/hardirq.h: In function `release_irqlock':
include/asm/hardirq.h:148: `BR_GLOBALIRQ_LOCK' undeclared (first use in 
this function)
init/main.c: In function `smp_init':
init/main.c:339: warning: implicit declaration of function `num_online_cpus'
init/main.c:341: warning: implicit declaration of function `cpu_online'
make[1]: *** [init/main.o] Error 1
make: *** [init] Error 2
----8<--------8<-------8<-------8<-----

Re: 2.5.68 and SMP on arch/sparc

[Rob Radez]

On Tue, Apr 29, 2003 at 03:33:02PM +0200, Schwarzseher wrote:
> Hi,
> out whatever reasons I'm currently trying to update a debian 
> installation on an old 2 processor SparcStation 20 clone.
> 
> Unfortunately I run into trouble compiling a 2.5.68 kernel on it. It 
> seems that the inline "cpu_possible" is missing out of 
> include/asm-sparc/smp.h while being existent in include/asm-i386/smp.h 
> and others. A
> Also unfortunately it seems to be needed for compiling successfully. 
> Even more unfortunately I don't have an idea on how to add it (or rather 
> what to add) because I'm not so deeply involved into inner kernel 
> workings or the sparc architecture.

This is a known problem and one that I'm hoping (if no one else gets
around to it) to fix when I get back home and have access to my SMP
sparc to test with.

> 
> I attached the errors below. Am I the only one who tries to ran an 
> actual 2.5 testing kernel on this vintage hardware?

I know for sure that I am, check out http://osinvestor.com/sparc/ for my
sparc32 kernel status page.  I also know for sure that not many other
people are.

> While in this issue (even when it's off topic for this list, so please 
> ignore if you feel insulted): Does anyone have an idea why swapon 
> /dev/sdc2 throws a core since I updated to a (successfully for SMP 
> compiled) 2.4.20 kernel? The swapon syscall is executed and in fact the 
> swapspace is added but afterwards the swapon utility hickups with an 
> segmentation fault... Had a look into the source but didn't understand 
> what may be happening that results into a segfault.

There is a patch going around for this that will hopefully be in the
next stock release.

One note: please e-mail the sparclinux@vger.kernel.org with sparc
specific problems since you're more likely not to get lost in the noise
there.  Also, the list archives at
http://marc.theaimsgroup.com/?l=linux-sparc (or various other places)
hold answers to all sorts of questions.

Regards,
Rob Radez