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authorJason Wessel <jason.wessel@windriver.com>2010-10-29 13:14:41 -0500
committerJason Wessel <jason.wessel@windriver.com>2010-10-29 13:14:41 -0500
commit578bd4dfcda63d2ef15f025f1d5d55c0e56b9660 (patch)
tree1c8e62b55dff82b64a0e4148134074cf4d8ffdae /kernel
parent834b2964b7ab047610da038e42d61dc8dac6339a (diff)
downloadlinux-2.6.38-lt-ux500-578bd4dfcda63d2ef15f025f1d5d55c0e56b9660.tar.gz
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/debug/kdb/kdb_main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 9755ac05e44..37755d62192 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -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