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From: "adhemerval.zanella at linaro dot org"
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Subject: [Bug string/26540] [linux-only] nanosleep should call the syscall of
 the same name, not the posix version
Date: Wed, 26 Aug 2020 21:27:08 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26540

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |adhemerval.zanella at lina=
ro dot o
                   |                            |rg

--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot or=
g> ---
Using CLOCK_REALTIME on nanosleep is defined by POSIX [1] and not using the
direct syscall on some systems was done to avoid multiple implementations f=
or
kernel ABI that do not provide __NR_nanosleep (for instance ABIs without 32=
-bit
time_t support).

Unfortunatelly the Linux syscall does not have the freedom to change its
semantic, and I don't think this change requires a symbol versioning to keep
the old clock semantic.

Are you seeing some realwork issues with this change? Afaik other libc
implementations for Linux (musl) always use CLOCK_REALTIME, as other Unix-l=
ike
systems (BSD, Solaris, and AIX).=20

[1] https://pubs.opengroup.org/onlinepubs/9699919799/functions/nanosleep.ht=
ml

--=20
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