mtrr on UP

swoop (swoop@bkg.stp.lt)
Thu, 22 Apr 1999 14:53:09 +0200 (CEST)


Just wondering why it is this way :
linux/init/main.c
...
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

and in the same file below

#if defined(CONFIG_MTRR) && defined(__SMP__)
init_mtrr_config();
#endif

if I have UP system, mtrr is not configured ?
No entry under /proc directory.

the kernel source 2.0.3[6,7].
$ cat /proc/cpuinfo
processor : 0
cpu : 686
model : Pentium II (Klamath)
vendor_id : GenuineIntel
stepping : 4
fdiv_bug : no
hlt_bug : no
f00f_bug : no
fpu : yes
fpu_exception : yes
cpuid : yes
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov mmx
bogomips : 265.42

shows that there should be MTRR support.

Thanks in advance.

ps.
Maybe it should be this way :

...
#if defined(CONFIG_MTRR) || defined(__SMP__)
#include <asm/mtrr.h>
#endif

....
#if defined(CONFIG_MTRR) || defined(__SMP__)
init_mtrr_config();
#endif

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