locking/Kconfig: Add LOCK_DEBUGGING_SUPPORT to make it more readable

There are a couples of lock debugging Kconfig options that depends on
the following support options:

 - TRACE_IRQFLAGS_SUPPORT
 - STACKTRACE_SUPPORT
 - LOCKDEP_SUPPORT

That makes those lock debugging options harder to read and understand.
So a new LOCK_DEBUGGING_SUPPORT option is added that is equivalent to
the above three options together. That makes the Kconfig.debug file
more readable.

Signed-off-by: Waiman Long <longman@redhat.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1522445280-7767-3-git-send-email-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 88650ab5cedb2936fe52f1c0b9ecba83ead89e78..ee7ca42e737e06f83bda335f4acacc199609b51e 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1034,6 +1034,11 @@ config DEBUG_PREEMPT
 
 menu "Lock Debugging (spinlocks, mutexes, etc...)"
 
+config LOCK_DEBUGGING_SUPPORT
+       bool
+       depends on TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+       default y
+
 config DEBUG_RT_MUTEXES
        bool "RT Mutex debugging, deadlock detection"
        depends on DEBUG_KERNEL && RT_MUTEXES
@@ -1060,7 +1065,7 @@ config DEBUG_MUTEXES
 
 config DEBUG_WW_MUTEX_SLOWPATH
        bool "Wait/wound mutex debugging: Slowpath testing"
-       depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+       depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
        select DEBUG_LOCK_ALLOC
        select DEBUG_SPINLOCK
        select DEBUG_MUTEXES
@@ -1084,7 +1089,7 @@ config DEBUG_RWSEMS
 
 config DEBUG_LOCK_ALLOC
        bool "Lock debugging: detect incorrect freeing of live locks"
-       depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+       depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
        select DEBUG_SPINLOCK
        select DEBUG_MUTEXES
        select DEBUG_RT_MUTEXES if RT_MUTEXES
@@ -1099,7 +1104,7 @@ config DEBUG_LOCK_ALLOC
 
 config PROVE_LOCKING
        bool "Lock debugging: prove locking correctness"
-       depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+       depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
        select LOCKDEP
        select DEBUG_SPINLOCK
        select DEBUG_MUTEXES
@@ -1144,7 +1149,7 @@ config PROVE_LOCKING
 
 config LOCKDEP
        bool
-       depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+       depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
        select STACKTRACE
        select FRAME_POINTER if !MIPS && !PPC && !ARM_UNWIND && !S390 && !MICROBLAZE && !ARC && !SCORE && !X86
        select KALLSYMS
@@ -1155,7 +1160,7 @@ config LOCKDEP_SMALL
 
 config LOCK_STAT
        bool "Lock usage statistics"
-       depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+       depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
        select LOCKDEP
        select DEBUG_SPINLOCK
        select DEBUG_MUTEXES