From: "Arnd Bergmann" <arnd@arndb.de>
To: "Willy Tarreau" <w@1wt.eu>
Cc: "Zhangjin Wu" <falcon@tinylab.org>,
"Thomas Weißschuh" <thomas@t-8ch.de>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-kselftest <linux-kselftest@vger.kernel.org>,
linux-riscv <linux-riscv@lists.infradead.org>
Subject: Re: [PATCH v3 11/12] selftests/nolibc: add new gettimeofday test cases
Date: Sun, 04 Jun 2023 13:38:39 +0200 [thread overview]
Message-ID: <54edae1f-0c1c-4beb-b6ac-fcd61fc81de8@app.fastmail.com> (raw)
In-Reply-To: <ZHx1OliMqHx9U1Lw@1wt.eu>
On Sun, Jun 4, 2023, at 13:27, Willy Tarreau wrote:
> On Sun, Jun 04, 2023 at 11:24:39AM +0200, Arnd Bergmann wrote:
>>
>> For user supplied non-normalized timeval values, it's not obvious
>> whether we need the full 64-bit division
>
> We don't have to care about these here for the microsecond part,
> because for decades these were exclusively 32-bit. Also the only
> one consuming this field would have been settimeofday() and it's
> already documented as returning EINVAL if tv_usec is not within
> the expected 0..999999 range.
Right
> Over time we managed
> to make simple code compile with both glibc and nolibc, but when it
> comes at the cost of adding size and burden for the developers, such
> as forcing them to add libgcc, I prefer that we slightly limit the
> domain of application instead.
Good point. This also reminds me that the compilers I build for
https://mirrors.edge.kernel.org/pub/tools/crosstool/ don't always
have every version of libgcc that may be needed, for instance
the mips compilers only provide a big-endian libgcc and the
arm compilers only provide a little-endian one, even though
the compilers can build code both ways with the right flags.
Arnd
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next prev parent reply other threads:[~2023-06-04 11:39 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-03 7:59 [PATCH v3 00/12] nolibc: add generic part1 of prepare for rv32 Zhangjin Wu
2023-06-03 8:00 ` [PATCH v3 01/12] selftests/nolibc: syscall_args: use generic __NR_statx Zhangjin Wu
2023-06-03 8:02 ` [PATCH v3 02/12] tools/nolibc: add missing nanoseconds support for __NR_statx Zhangjin Wu
2023-06-04 11:18 ` Willy Tarreau
2023-06-04 12:00 ` Thomas Weißschuh
2023-06-04 12:53 ` Willy Tarreau
2023-06-03 8:04 ` [PATCH v3 03/12] selftests/nolibc: allow specify extra arguments for qemu Zhangjin Wu
2023-06-03 8:05 ` [PATCH v3 04/12] selftests/nolibc: fix up compile warning with glibc on x86_64 Zhangjin Wu
2023-06-03 8:06 ` [PATCH v3 05/12] selftests/nolibc: not include limits.h for nolibc Zhangjin Wu
2023-06-03 8:08 ` [PATCH v3 06/12] selftests/nolibc: use INT_MAX instead of __INT_MAX__ Zhangjin Wu
2023-06-03 8:09 ` [PATCH v3 07/12] tools/nolibc: arm: add missing my_syscall6 Zhangjin Wu
2023-06-03 8:11 ` [PATCH v3 08/12] tools/nolibc: open: fix up compile warning for arm Zhangjin Wu
2023-06-03 8:13 ` [PATCH v3 09/12] selftests/nolibc: support two errnos with EXPECT_SYSER2() Zhangjin Wu
2023-06-03 8:14 ` [PATCH v3 10/12] selftests/nolibc: remove gettimeofday_bad1/2 completely Zhangjin Wu
2023-06-03 8:16 ` [PATCH v3 11/12] selftests/nolibc: add new gettimeofday test cases Zhangjin Wu
2023-06-04 6:46 ` Thomas Weißschuh
[not found] ` <tencent_4668A50A08C3D31E7531619E@qq.com>
2023-06-04 9:24 ` Arnd Bergmann
2023-06-04 11:27 ` Willy Tarreau
2023-06-04 11:38 ` Arnd Bergmann [this message]
2023-06-04 11:46 ` Willy Tarreau
2023-06-05 11:12 ` Zhangjin Wu
2023-06-03 8:17 ` [PATCH v3 12/12] selftests/nolibc: test_fork: fix up duplicated print Zhangjin Wu
2023-06-04 6:49 ` [PATCH v3 00/12] nolibc: add generic part1 of prepare for rv32 Thomas Weißschuh
2023-06-04 12:54 ` Willy Tarreau
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