linux-kernel - Re: [PATCH v2 06/16] powerpc/watchpoint: Provide DAWR number to __set

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Date:   Wed, 1 Apr 2020 14:27:24 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     mpe@...erman.id.au, mikey@...ling.org, apopple@...ux.ibm.com,
        paulus@...ba.org, npiggin@...il.com,
        naveen.n.rao@...ux.vnet.ibm.com, peterz@...radead.org,
        jolsa@...nel.org, oleg@...hat.com, fweisbec@...il.com,
        mingo@...nel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Subject: Re: [PATCH v2 06/16] powerpc/watchpoint: Provide DAWR number to
 __set_breakpoint



On 4/1/20 12:33 PM, Christophe Leroy wrote:
> 
> 
> Le 01/04/2020 à 08:12, Ravi Bangoria a écrit :
>> Introduce new parameter 'nr' to __set_breakpoint() which indicates
>> which DAWR should be programed. Also convert current_brk variable
>> to an array.
>>
>> Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
>> ---
>>   arch/powerpc/include/asm/debug.h         |  2 +-
>>   arch/powerpc/include/asm/hw_breakpoint.h |  2 +-
>>   arch/powerpc/kernel/hw_breakpoint.c      |  8 ++++----
>>   arch/powerpc/kernel/process.c            | 14 +++++++-------
>>   arch/powerpc/kernel/signal.c             |  2 +-
>>   arch/powerpc/xmon/xmon.c                 |  2 +-
>>   6 files changed, 15 insertions(+), 15 deletions(-)
>>
>> diff --git a/arch/powerpc/include/asm/debug.h b/arch/powerpc/include/asm/debug.h
>> index 7756026b95ca..6228935a8b64 100644
>> --- a/arch/powerpc/include/asm/debug.h
>> +++ b/arch/powerpc/include/asm/debug.h
>> @@ -45,7 +45,7 @@ static inline int debugger_break_match(struct pt_regs *regs) { return 0; }
>>   static inline int debugger_fault_handler(struct pt_regs *regs) { return 0; }
>>   #endif
>> -void __set_breakpoint(struct arch_hw_breakpoint *brk);
>> +void __set_breakpoint(struct arch_hw_breakpoint *brk, int nr);
> 
> Same, I think it would make more sense to have nr as first argument.

Sorry, didn't get your point. How will that help?

Ravi