Compiling 2.4.20-pre7 fails for i486 (still a fer of them around) without
Symmetric multi-processing support. With SMP support, the kernel compiles,
but resets immediately after boot.
This is with gcc 2.95.3
Yours
Ian
/usr/src/linux/include/linux/modules/ksyms.ver:548: warning: `del_timer_sync' redefined
/usr/src/linux/include/linux/timer.h:30: warning: this is the location of the previous definition
In file included from /usr/src/linux/include/linux/interrupt.h:45,
from ksyms.c:21:
/usr/src/linux/include/asm/hardirq.h:37: warning: `synchronize_irq' redefined
/usr/src/linux/include/linux/modules/i386_ksyms.ver:90: warning: this is the location of the previous definition
In file included from ksyms.c:17:
/usr/src/linux/include/linux/kernel_stat.h: In function `kstat_irqs':
/usr/src/linux/include/linux/kernel_stat.h:57: `smp_num_cpus' undeclared (first
use in this function)
/usr/src/linux/include/linux/kernel_stat.h:57: (Each undeclared identifier is reported only once
/usr/src/linux/include/linux/kernel_stat.h:57: for each function it appears in.)make[2]: *** [ksyms.o] Error 1
make[2]: Leaving directory `/usr/src/linux/kernel'
make[1]: *** [first_rule] Error 2
make[1]: Leaving directory `/usr/src/linux/kernel'
make: *** [_dir_kernel] Error 2
<snip>
> /usr/src/linux/include/linux/kernel_stat.h: In function `kstat_irqs':
> /usr/src/linux/include/linux/kernel_stat.h:57: `smp_num_cpus' undeclared (first
> use in this function)
> /usr/src/linux/include/linux/kernel_stat.h:57: (Each undeclared identifier is reported
only once
> /usr/src/linux/include/linux/kernel_stat.h:57: for each function it appears in.)make[2]:
*** [ksyms.o] Error 1
> make[2]: Leaving directory `/usr/src/linux/kernel'
> make[1]: *** [first_rule] Error 2
> make[1]: Leaving directory `/usr/src/linux/kernel'
> make: *** [_dir_kernel] Error 2
Strange that this has not being noticed before 2.4 define kstat_irqs as
#if defined (__hppa__)
/*
* Number of interrupts per specific IRQ source, since bootup
*/
static inline int kstat_irqs (int irq)
{
return kstat.irqs[IRQ_REGION(irq)][IRQ_OFFSET(irq)];
}
#elif !defined(CONFIG_ARCH_S390)
/*
* Number of interrupts per specific IRQ source, since bootup
*/
extern inline int kstat_irqs (int irq)
{
int i, sum=0;
for (i = 0 ; i < smp_num_cpus ; i++)
sum += kstat.irqs[cpu_logical_map(i)][irq];
return sum;
}
#endif
But smp_num_cpus is only defined for SMP kernels
on the other hand 2.5 defines it as
#if !defined(CONFIG_ARCH_S390)
/*
* Number of interrupts per specific IRQ source, since bootup
*/
static inline int kstat_irqs (int irq)
{
int i, sum=0;
for (i = 0 ; i < NR_CPUS ; i++)
sum += kstat.irqs[i][irq];
return sum;
}
#endif
which seems correct cause NR_CPUS is defined as 1 for UP
is this a correct patch?
diff -uNr include/linux/kernel_stat.h~ include/linux/kernel_stat.h
--- include/linux/kernel_stat.h~ 2002-09-23 16:16:45.000000000 +0200
+++ include/linux/kernel_stat.h 2002-09-23 16:42:42.000000000 +0200
@@ -54,7 +54,7 @@
{
int i, sum=0;
- for (i = 0 ; i < smp_num_cpus ; i++)
+ for (i = 0 ; i < NR_CPUS ; i++)
sum += kstat.irqs[cpu_logical_map(i)][irq];
return sum;
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