Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

[firefly-linux-kernel-4.4.55.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 566cf2bc08eaac44813dd9a1d1ac0d816a072237..7154f799541a41c5a4b7f3a351696d24b6e7db49 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -547,6 +547,19 @@ config DEBUG_MUTEXES
         This feature allows mutex semantics violations to be detected and
         reported.
 
+config DEBUG_WW_MUTEX_SLOWPATH
+       bool "Wait/wound mutex debugging: Slowpath testing"
+       depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+       select DEBUG_LOCK_ALLOC
+       select DEBUG_SPINLOCK
+       select DEBUG_MUTEXES
+       help
+        This feature enables slowpath testing for w/w mutex users by
+        injecting additional -EDEADLK wound/backoff cases. Together with
+        the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this
+        will test all possible w/w mutex interface abuse with the
+        exception of simply not acquiring all the required locks.
+
 config DEBUG_LOCK_ALLOC
        bool "Lock debugging: detect incorrect freeing of live locks"
        depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT