[PATCH 27/37] debug_core, kdb: Allow the debug core to process a recursive debug entry

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This allows kdb to debug a crash with in the kms code with a
single level recursive re-entry.

Signed-off-by: Jason Wessel <jason.wessel at windriver.com>
 kernel/debug/debug_core.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index e44e693..e6c6f8a 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -443,6 +443,10 @@ static int kgdb_reenter_check(struct kgdb_state *ks)
 	printk(KERN_CRIT "KGDB: re-enter exception: ALL breakpoints killed\n");
+	/* Allow kdb to debug itself one level */
+	return 0;
 	panic("Recursive entry to debugger");
@@ -487,6 +491,9 @@ acquirelock:
 	atomic_set(&cpu_in_kgdb[cpu], 1);
+	if (exception_level == 1)
+		goto cpu_master_loop;
 	 * CPU will loop if it is a slave or request to become a kgdb
 	 * master cpu and acquire the kgdb_active lock:

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