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From: Peter Zijlstra <peterz@infradead.org>
To: Song Liu <songliubraving@fb.com>
Cc: "open list:BPF (Safe dynamic programs and tools)" 
	<bpf@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	"acme@kernel.org" <acme@kernel.org>,
	"mingo@redhat.com" <mingo@redhat.com>,
	"kjain@linux.ibm.com" <kjain@linux.ibm.com>,
	Kernel Team <Kernel-team@fb.com>
Subject: Re: [PATCH v2 bpf-next 1/3] perf: enable branch record for software events
Date: Mon, 30 Aug 2021 20:07:24 +0200	[thread overview]
Message-ID: <YS0eXMd5Y5yV/m1m@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <719D2DC2-CC5D-4C6A-94F4-DBCADDA291CC@fb.com>

On Mon, Aug 30, 2021 at 05:41:46PM +0000, Song Liu wrote:
> DECLARE_STATIC_CALL(perf_snapshot_branch_stack,
>                    int (*)(struct perf_branch_snapshot *));

> Something like 
> 
> typedef int (perf_snapshot_branch_stack_t)(struct perf_branch_snapshot *);
> DECLARE_STATIC_CALL(perf_snapshot_branch_stack, perf_snapshot_branch_stack_t);
> 
> seems to work fine. 

Oh urg, indeed. It wants a function type, not a function pointer type.
I've been bitten by that before. Go with the typedef, that's the sanest.

  reply	other threads:[~2021-08-30 18:08 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-26 22:13 [PATCH v2 bpf-next 0/3] bpf: introduce bpf_get_branch_snapshot Song Liu
2021-08-26 22:13 ` [PATCH v2 bpf-next 1/3] perf: enable branch record for software events Song Liu
2021-08-30 10:22   ` Peter Zijlstra
2021-08-30 15:25     ` Song Liu
2021-08-30 16:06       ` Peter Zijlstra
2021-08-30 16:36         ` Song Liu
2021-09-01 17:09           ` Peter Zijlstra
2021-08-30 17:41     ` Song Liu
2021-08-30 18:07       ` Peter Zijlstra [this message]
2021-09-01 17:12         ` Peter Zijlstra
2021-09-04 23:01           ` Josh Poimboeuf
2021-08-30 10:43   ` Peter Zijlstra
2021-08-30 16:06     ` Song Liu
2021-08-26 22:13 ` [PATCH v2 bpf-next 2/3] bpf: introduce helper bpf_get_branch_snapshot Song Liu
2021-08-27  9:28   ` kernel test robot
2021-08-27 15:10   ` kernel test robot
2021-08-30 10:47     ` Peter Zijlstra
2021-08-26 22:13 ` [PATCH v2 bpf-next 3/3] selftests/bpf: add test for bpf_get_branch_snapshot Song Liu

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