From de5097c2e73f826302cd8957c225b3725e0c7553 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 9 Jan 2006 15:59:21 -0800 Subject: [PATCH] mutex subsystem, more debugging code more mutex debugging: check for held locks during memory freeing, task exit, enable sysrq printouts, etc. Signed-off-by: Ingo Molnar Signed-off-by: Arjan van de Ven --- drivers/char/sysrq.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers/char') diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c index 145275ebdd7e..5765f672e853 100644 --- a/drivers/char/sysrq.c +++ b/drivers/char/sysrq.c @@ -153,6 +153,21 @@ static struct sysrq_key_op sysrq_mountro_op = { /* END SYNC SYSRQ HANDLERS BLOCK */ +#ifdef CONFIG_DEBUG_MUTEXES + +static void +sysrq_handle_showlocks(int key, struct pt_regs *pt_regs, struct tty_struct *tty) +{ + mutex_debug_show_all_locks(); +} + +static struct sysrq_key_op sysrq_showlocks_op = { + .handler = sysrq_handle_showlocks, + .help_msg = "show-all-locks(D)", + .action_msg = "Show Locks Held", +}; + +#endif /* SHOW SYSRQ HANDLERS BLOCK */ @@ -294,7 +309,11 @@ static struct sysrq_key_op *sysrq_key_table[SYSRQ_KEY_TABLE_LENGTH] = { #else /* c */ NULL, #endif +#ifdef CONFIG_DEBUG_MUTEXES +/* d */ &sysrq_showlocks_op, +#else /* d */ NULL, +#endif /* e */ &sysrq_term_op, /* f */ &sysrq_moom_op, /* g */ NULL, -- cgit v1.2.1