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SubjectRe: [PATCH v2 1/2] config: Add new CONFIG_PROVE_LOCKING_SMALL
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On 9/27/2016 10:43 AM, Sam Ravnborg wrote:
> On Tue, Sep 27, 2016 at 09:51:40AM -0500, Babu Moger wrote:
>> On 9/27/2016 6:40 AM, Peter Zijlstra wrote:
>>> On Tue, Sep 27, 2016 at 06:46:25AM +0200, Sam Ravnborg wrote:
>>>> Since this is only relevant for sparc, and for sparc this is "select"ed,
>>>> then there is limited/no gain having this as a visible menu config option.
>>>>
>>>> How about adding just a simple non-visible config symbol:
>>>>
>>>> config PROVE_LOCKING_SMALL
>>>> bool
>>>>
>>>> The nice help text can be added to the H file, and the select
>>>> can be move to the sparc/Kconfig file where it really belongs.
>>> Yes, this should not be user selectable. I don't mind the help being
>>> here though.
>> How about this?
>> Moved everything to arch/sparc/Kconfig.debug. It may be not useful
>> to have help in
>> config file as it is not visible. Lets have some explanation in .h file.
>> I will send v3 version if you all agree.
>> =====================================
>> diff --git a/arch/sparc/Kconfig.debug b/arch/sparc/Kconfig.debug
>> index 6db35fb..67e58a1 100644
>> --- a/arch/sparc/Kconfig.debug
>> +++ b/arch/sparc/Kconfig.debug
>> @@ -21,4 +21,9 @@ config FRAME_POINTER
>> depends on MCOUNT
>> default y
>>
>> +config PROVE_LOCKING_SMALL
>> + bool
>> + depends on PROVE_LOCKING && SPARC
>> + default y
>> +
>> endmenu
> The idea is to have the SPAC specific stuff in arch/sparc/Kconfig,
> and not scattered in Kconfig files all over the tree.
>
> Therefore drop the "depends".
>
> In sparc/Kconfig you then just do:
>
> config SPARC
> select PROVE_LOCKING_SMALL if PROVE_LOCKING
>
> The if part is likely not needed as PROVE_LOCKING_SMALL will be ignored
> unless PROVE_LOCKING is enabled.
Sure. thanks. Here it is below. I will re-post v3.


diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index cde1a62..353731f 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -43,6 +43,7 @@ config SPARC
select ODD_RT_SIGACTION
select OLD_SIGSUSPEND
select ARCH_HAS_SG_CHAIN
+ select PROVE_LOCKING_SMALL if PROVE_LOCKING

config SPARC32
def_bool !64BIT
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index ba2b0c8..3ba1665 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1008,6 +1008,9 @@ config PROVE_LOCKING

For more details, see Documentation/locking/lockdep-design.txt.

+config PROVE_LOCKING_SMALL
+ bool
+
config LOCKDEP
bool
depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT &&
STACKTRACE_SUPPORT && LOCKDEP_SUPPORT



> Sam

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