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From: Peter Zijlstra <peterz@infradead.org>
To: kernel test robot <lkp@intel.com>
Cc: Song Liu <songliubraving@fb.com>,
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
	kbuild-all@lists.01.org, acme@kernel.org, mingo@redhat.com,
	kjain@linux.ibm.com, kernel-team@fb.com
Subject: Re: [PATCH v2 bpf-next 2/3] bpf: introduce helper bpf_get_branch_snapshot
Date: Mon, 30 Aug 2021 12:47:40 +0200	[thread overview]
Message-ID: <20210830104740.GK4353@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <202108272326.sMsn5b1g-lkp@intel.com>

On Fri, Aug 27, 2021 at 11:10:39PM +0800, kernel test robot wrote:

> All errors (new ones prefixed by >>):
> 
>    riscv32-linux-ld: kernel/bpf/trampoline.o: in function `.L57':
> >> trampoline.c:(.text+0x34c): undefined reference to `__SCK__perf_snapshot_branch_stack'
>    riscv32-linux-ld: kernel/bpf/trampoline.o: in function `.L61':
>    trampoline.c:(.text+0x360): undefined reference to `bpf_perf_branch_snapshot'
> 

This a build with PERF_EVENTS=n, I suppose you'd better make calling
perf_snapshot_branch_stack() dependent on having that :-)

  reply	other threads:[~2021-08-30 10:48 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
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 [this message]
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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