On Feb 22, 2006, at 2:29 PM, Michael Buesch wrote:
Hi,
On a powerPC 32bit, I got the following debugging assertion failure:
[ 733.209827] Debug: sleeping function called from invalid context
at arch/powerpc/kernel/traps.c:697
[ 733.210682] in_atomic():0, irqs_disabled():1
[ 733.211347] Call Trace:
[ 733.211969] [D6023EB0] [C0007F84] show_stack+0x58/0x174
(unreliable)
[ 733.212765] [D6023EE0] [C0022C34] __might_sleep+0xbc/0xd0
[ 733.213523] [D6023EF0] [C000D158] program_check_exception
+0x1d8/0x4fc
[ 733.214309] [D6023F40] [C000E744] ret_from_except_full+0x0/0x4c
[ 733.215076] --- Exception: 700 at 0x102a7100
[ 733.215785] LR = 0xdb9ef04
It is caused by the line
if (get_user(instword, (u32 __user *)(regs->nip)))
in arch/powerpc/kernel/traps.c:emulate_instruction()
I am not sure, if this is an indication for a bug, or just false
alarm.
In case of false alarm, the debugging message should be made quiet
somehow, though.
Paul,
Last time this was brought up we left it wondering why you had made
program_check_exception() run with interrupts disabled. Any further
ideas on that one?
- kumar
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