From: Michael Ellerman <mpe@ellerman.id.au>
To: Frederic Weisbecker <frederic@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Joel Fernandes <joel.opensrc@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Chris Zankel <chris@zankel.net>,
Paul Mackerras <paulus@samba.org>,
Thomas Gleixner <tglx@linutronix.de>,
Will Deacon <will.deacon@arm.com>, Rich Felker <dalias@libc.org>,
Ingo Molnar <mingo@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Max Filippov <jcmvbkbc@gmail.com>
Subject: Re: [PATCH 01/12] perf/breakpoint: Split attribute parse and commit
Date: Thu, 24 May 2018 11:56:01 +1000 [thread overview]
Message-ID: <87h8mxstou.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <1526697950-7091-2-git-send-email-frederic@kernel.org>
Frederic Weisbecker <frederic@kernel.org> writes:
> diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
> index 6e28d28..51320c2 100644
> --- a/kernel/events/hw_breakpoint.c
> +++ b/kernel/events/hw_breakpoint.c
> @@ -424,19 +443,22 @@ static int validate_hw_breakpoint(struct perf_event *bp)
>
> int register_perf_hw_breakpoint(struct perf_event *bp)
> {
> - int ret;
> + struct arch_hw_breakpoint hw;
> + int err;
>
> - ret = reserve_bp_slot(bp);
> - if (ret)
> - return ret;
> + err = reserve_bp_slot(bp);
> + if (err)
> + return err;
>
> - ret = validate_hw_breakpoint(bp);
> -
> - /* if arch_validate_hwbkpt_settings() fails then release bp slot */
> - if (ret)
> + err = hw_breakpoint_parse(bp, &bp->attr, &hw);
Is there a good reason we pass bp and bp->attr? (I assume so)
That added to the confusion in the existing code I think.
cheers
next prev parent reply other threads:[~2018-05-24 1:56 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-19 2:45 [PATCH 00/12] breakpoint: Rework arch validation v2 Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 01/12] perf/breakpoint: Split attribute parse and commit Frederic Weisbecker
2018-05-24 1:56 ` Michael Ellerman [this message]
2018-05-25 13:58 ` Frederic Weisbecker
2018-05-28 11:29 ` Michael Ellerman
2018-05-19 2:45 ` [PATCH 02/12] perf/breakpoint: Pass arch breakpoint struct to arch_check_bp_in_kernelspace() Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 03/12] x86: Implement hw_breakpoint_arch_parse() Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 04/12] powerpc: " Frederic Weisbecker
2018-05-24 2:01 ` Michael Ellerman
2018-05-25 14:05 ` Frederic Weisbecker
2018-05-28 11:31 ` Michael Ellerman
2018-06-01 14:46 ` Frederic Weisbecker
2018-06-05 11:06 ` Michael Ellerman
2018-05-19 2:45 ` [PATCH 05/12] arm: " Frederic Weisbecker
2018-05-25 12:18 ` Mark Rutland
2018-05-19 2:45 ` [PATCH 06/12] arm64: " Frederic Weisbecker
2018-05-23 15:23 ` Will Deacon
2018-05-25 12:18 ` Mark Rutland
2018-05-19 2:45 ` [PATCH 07/12] sh: Remove "struct arch_hw_breakpoint::name" unused field Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 08/12] sh: Implement hw_breakpoint_arch_parse() Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 09/12] xtensa: " Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 10/12] perf/breakpoint: Remove default hw_breakpoint_arch_parse() Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 11/12] perf/breakpoint: Pass new breakpoint type to modify_breakpoint_slot() Frederic Weisbecker
2018-05-19 2:45 ` [PATCH 12/12] perf/breakpoint: Clean up and consolidate modify_user_hw_breakpoint_check() Frederic Weisbecker
2018-06-01 14:31 [GIT PULL] breakpoint: Rework arch validation v3 Frederic Weisbecker
2018-06-01 14:31 ` [PATCH 01/12] perf/breakpoint: Split attribute parse and commit Frederic Weisbecker
2018-06-26 2:58 [GIT PULL] breakpoint: Rework arch validation v4 Frederic Weisbecker
2018-06-26 2:58 ` [PATCH 01/12] perf/breakpoint: Split attribute parse and commit Frederic Weisbecker
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