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authorIngo Molnar <mingo@elte.hu>2006-01-09 15:59:21 -0800
committerIngo Molnar <mingo@hera.kernel.org>2006-01-09 15:59:21 -0800
commitde5097c2e73f826302cd8957c225b3725e0c7553 (patch)
tree3d56ab6fd891088ac55a9ef529faf4360391a22f /drivers
parent408894ee4dd4debfdedd472eb4d8414892fc90f6 (diff)
[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 <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/sysrq.c19
1 files changed, 19 insertions, 0 deletions
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,