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Date:   Tue, 17 Mar 2020 19:56:55 +0100
From:   Daniel Borkmann <>
To:     Andrii Nakryiko <>,,,
Subject: Re: [PATCH v2 bpf-next] selftests/bpf: fix nanosleep for real this

On 3/14/20 1:27 AM, Andrii Nakryiko wrote:
> Amazingly, some libc implementations don't call __NR_nanosleep syscall from
> their nanosleep() APIs. Hammer it down with explicit syscall() call and never
> get back to it again. Also simplify code for timespec initialization.
> I verified that nanosleep is called w/ printk and in exactly same Linux image
> that is used in Travis CI. So it should both sleep and call correct syscall.
> v1->v2:
>    - math is too hard, fix usec -> nsec convertion (Martin);
>    - test_vmlinux has explicit nanosleep() call, convert that one as well.
> Fixes: 4e1fd25d19e8 ("selftests/bpf: Fix usleep() implementation")
> Signed-off-by: Andrii Nakryiko <>

Applied, thanks!

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