[2.5.47] Unable to load XFS module

[2.5.47] Unable to load XFS module

[Kronos]

Hi,
I'm playing with kernel 2.5.47. XFS support is compiled as module and at
boot time, while mounting /home, I get this:

insmod /lib/modules/2.5.47/kernel/fs/xfs/xfs.o failed

Then, trying to modprobe xfs by hand:

/lib/modules/2.5.47/kernel/fs/xfs/xfs.o: unresolved symbol page_states__per_cpu
/lib/modules/2.5.47/kernel/fs/xfs/xfs.o: insmod /lib/modules/2.5.47/kernel/fs/xfs/xfs.o failed
/lib/modules/2.5.47/kernel/fs/xfs/xfs.o: insmod xfs failed

I'm using modutils 2.4.19

ciao,
Luca
-- 
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Re: [2.5.47] Unable to load XFS module

[Stephen Lord]

On Wed, 2002-11-13 at 12:48, Kronos wrote:
> 
> Hi,
> I'm playing with kernel 2.5.47. XFS support is compiled as module and at
> boot time, while mounting /home, I get this:
> 
> insmod /lib/modules/2.5.47/kernel/fs/xfs/xfs.o failed
> 
> Then, trying to modprobe xfs by hand:
> 
> /lib/modules/2.5.47/kernel/fs/xfs/xfs.o: unresolved symbol page_states__per_cpu
> /lib/modules/2.5.47/kernel/fs/xfs/xfs.o: insmod /lib/modules/2.5.47/kernel/fs/xfs/xfs.o failed
> /lib/modules/2.5.47/kernel/fs/xfs/xfs.o: insmod xfs failed

If you turn off modversions it works, this appears to be an issue
with the per_cpu variables and how module versioning works with
them.

Steve

Re: [2.5.47] Unable to load XFS module

[Andrew Morton]

Kronos wrote:
> 
> Hi,
> I'm playing with kernel 2.5.47. XFS support is compiled as module and at
> boot time, while mounting /home, I get this:
> 
> insmod /lib/modules/2.5.47/kernel/fs/xfs/xfs.o failed
> 
> Then, trying to modprobe xfs by hand:
> 
> /lib/modules/2.5.47/kernel/fs/xfs/xfs.o: unresolved symbol page_states__per_cpu
> /lib/modules/2.5.47/kernel/fs/xfs/xfs.o: insmod /lib/modules/2.5.47/kernel/fs/xfs/xfs.o failed
> /lib/modules/2.5.47/kernel/fs/xfs/xfs.o: insmod xfs failed
> 

You'll need to disable module symbol versioning, or apply this
patch from Rusty:



 include/asm-generic/percpu.h |    6 ++++++
 1 files changed, 6 insertions(+)

--- 25/include/asm-generic/percpu.h~genksyms-fix	Wed Nov 13 00:57:06 2002
+++ 25-akpm/include/asm-generic/percpu.h	Wed Nov 13 00:57:06 2002
@@ -35,4 +35,10 @@ extern unsigned long __per_cpu_offset[NR
 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(var##__per_cpu)
 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(var##__per_cpu)
 
+/* Genksyms can't follow the percpu declaration.  Give it a fake one. */
+#ifdef __GENKSYMS__
+#undef DEFINE_PER_CPU
+#define DEFINE_PER_CPU(type, name) type name##__per_cpu
+#endif /*__GENKSYMS__*/
+
 #endif /* _ASM_GENERIC_PERCPU_H_ */

_