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Re: [PATCH V2 3/5] arm64: hw_breakpoint: Handle inexact watchpoint addresses

From Pavel Labath <labath@google.com>
Newsgroups linux.kernel
Subject Re: [PATCH V2 3/5] arm64: hw_breakpoint: Handle inexact watchpoint addresses
Date 2016-11-08 13:10 +0100
Message-ID <sBdnY-Jq-33@gated-at.bofh.it> (permalink)
References <sueoN-3mL-7@gated-at.bofh.it> <sueoN-3mL-5@gated-at.bofh.it> <sB5gJ-3TL-15@gated-at.bofh.it>
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>>
>>               /* Do we need to handle the stepping? */
>>               if (is_default_overflow_handler(wp))
>>                       step = 1;
>> -
>> -unlock:
>> -             rcu_read_unlock();
>>       }
>> +     if (min_dist > 0 && min_dist != -1) {
>> +             /* No exact match found. */
>> +             wp = slots[closest_match];
>> +             info = counter_arch_bp(wp);
>> +             info->trigger = addr;
>> +             perf_bp_event(wp, regs);
>> +     }
>
> Why don't we need to bother with the stepping in the case of a non-exact
> match?

Good catch. I think we do. I must have dropped that part somehow.

Pratyush, could you include the attached fixup in the next batch?

regards,
pavel

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Thread

Re: [PATCH V2 3/5] arm64: hw_breakpoint: Handle inexact watchpoint  addresses Will Deacon <will.deacon@arm.com> - 2016-11-08 04:30 +0100
  Re: [PATCH V2 3/5] arm64: hw_breakpoint: Handle inexact watchpoint addresses Pavel Labath <labath@google.com> - 2016-11-08 13:10 +0100
    Re: [PATCH V2 3/5] arm64: hw_breakpoint: Handle inexact watchpoint  addresses Pratyush Anand <panand@redhat.com> - 2016-11-09 18:40 +0100

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