From: Jason Wessel Date: Fri, 21 May 2010 02:04:27 +0000 (-0500) Subject: debug_core,kdb: Allow the debug core to process a recursive debug entry X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6d90634076200af035f1d9dcc8fc11acefd603e9;p=linux-beck.git debug_core,kdb: Allow the debug core to process a recursive debug entry This allows kdb to debug a crash with in the kms code with a single level recursive re-entry. Signed-off-by: Jason Wessel --- diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index fff59019cca0..b38bb25dbbb3 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -445,6 +445,10 @@ static int kgdb_reenter_check(struct kgdb_state *ks) } printk(KERN_CRIT "KGDB: re-enter exception: ALL breakpoints killed\n"); +#ifdef CONFIG_KGDB_KDB + /* Allow kdb to debug itself one level */ + return 0; +#endif dump_stack(); panic("Recursive entry to debugger"); @@ -489,6 +493,9 @@ acquirelock: */ atomic_inc(&cpu_in_kgdb[cpu]); + 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: