Date: Fri, 19 Jan 2024 19:50:04 +0100 From: Jan Beich <jbeich@FreeBSD.org> To: Rozhuk Ivan <rozhuk.im@gmail.com> Cc: FreeBSD Hackers <freebsd-hackers@FreeBSD.org>, FreeBSD Mailing List <freebsd-ports@freebsd.org> Subject: Re: kcmp implementation for mesa Message-ID: <5xzp-noo3-wny@FreeBSD.org> In-Reply-To: <20240119131047.6975f574@rimwks.local> (Rozhuk Ivan's message of "Fri, 19 Jan 2024 13:10:47 %2B0200") References: <20240119131047.6975f574@rimwks.local>
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Rozhuk Ivan <rozhuk.im@gmail.com> writes:
> Hi!
>
>
> graphics/mesa-* uses SYS_kcmp [1] to compare two fds:
>
> int
> os_same_file_description(int fd1, int fd2)
> {
> pid_t pid = getpid();
>
> /* Same file descriptor trivially implies same file description */
> if (fd1 == fd2)
> return 0;
>
> return syscall(SYS_kcmp, pid, pid, KCMP_FILE, fd1, fd2);
> }
>
> FreeBSD does not implemet this and we got in terminal:
> "amdgpu: os_same_file_description couldn't determine if two DRM fds reference the same file description."
See https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6881
It's already applied in graphics/mesa-devel.
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