Re: [PATCH 1/3] kthread: update s390 cmm driver to use kthread

Heiko Carstens
2006-08-28T13:38:08Z

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> AP instructions not installed.
> BUG: warning at lib/kref.c:32/kref_get()
> 000000000017719a 0000000000000002 0000000000000000 0000000000a03cf0
> 0000000000a03c68 000000000037fc2c 000000000037fc2c 0000000000015dfa
> 0000000000000000 0000000000000000 000000000043ac30 0000000000000000
> 0000000000000000 000000000000000d 0000000000a03c50 0000000000a03cc8
> 0000000000362488 0000000000015dfa 0000000000a03c50 0000000000a03ca0
> Call Trace:
> (Ý<0000000000015d44>¨ show_trace+0x9c/0xb8)
> Ý<0000000000015e18>¨ show_stack+0xb8/0xc8
> Ý<0000000000015e56>¨ dump_stack+0x2e/0x3c
> Ý<0000000000163f70>¨ kref_get+0x50/0x74
> Ý<0000000000162ec6>¨ kobject_get+0x32/0x44
> Ý<0000000000178fd6>¨ get_bus+0x36/0x60
> Ý<0000000000179a12>¨ bus_add_driver+0x3a/0x1f4
> Ý<000000000017ae30>¨ driver_register+0xb0/0xc0
> Ý<000000000021a1fe>¨ ap_driver_register+0x56/0x64
> Ý<00000000004c6ba6>¨ zcrypt_pcicc_init+0x36/0x44
> Ý<000000000001330c>¨ init+0x1bc/0x3a4
> Ý<00000000000184be>¨ kernel_thread_starter+0x6/0xc
> Ý<00000000000184b8>¨ kernel_thread_starter+0x0/0xc

This should be fixed with -mm3. In addition you need this one on top of -mm3:

arch/s390/kernel/time.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6.18-rc4-mm3/arch/s390/kernel/time.c
===================================================================
--- linux-2.6.18-rc4-mm3.orig/arch/s390/kernel/time.c 2006-08-28 10:32:45.000000000 +0200
+++ linux-2.6.18-rc4-mm3/arch/s390/kernel/time.c 2006-08-28 10:42:33.000000000 +0200
@@ -85,7 +85,8 @@
{
__u64 now;

- now = (get_clock() - jiffies_timer_cc) >> 12;
+ now = (get_clock() - jiffies_timer_cc) >> 12;
+ now -= (__u64) jiffies * USECS_PER_JIFFY;
return (unsigned long) now;
}