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kdb: Fix early debugging crash regression 

The kdb_current legally be equal to NULL in the early boot of the x86
arch.  The problem pcan be observed by booting with the kernel arguments:

    earlyprintk=vga ekgdboc=kbd kgdbwait

The kdb shell will oops on entry and recursively fault because it
cannot get past the final stage of shell initialization.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jason Wessel 2010-10-29 13:14:41 -05:00
parent 834b2964b7
commit 578bd4dfcd
1 changed files with 1 additions and 1 deletions
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2
kernel/debug/kdb/kdb_main.c
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@ -1127,7 +1127,7 @@ static int kdb_local(kdb_reason_t reason, int error, struct pt_regs *regs,
/* special case below */
} else {
kdb_printf("\nEntering kdb (current=0x%p, pid %d) ",
kdb_current, kdb_current->pid);
kdb_current, kdb_current ? kdb_current->pid : 0);
#if defined(CONFIG_SMP)
kdb_printf("on processor %d ", raw_smp_processor_id());
#endif