linux-kernel - [PATCH v2 00/13] tools/nolibc: always use 64-bit time-related types

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Message-Id: <20251122-nolibc-uapi-types-v2-0-b814a43654f5@weissschuh.net>
Date: Sat, 22 Nov 2025 17:59:06 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH v2 00/13] tools/nolibc: always use 64-bit time-related
 types

nolibc currently uses 32-bit types for various APIs. These are
problematic as their reduced value range can lead to truncated values.

Intended for 6.19.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
Changes in v2:
- Drop already applied ino_t and off_t patches.
- Also handle 'struct timeval'.
- Make the progression of the series a bit clearer.
- Add compatibility assertions.
- Link to v1: https://lore.kernel.org/r/20251029-nolibc-uapi-types-v1-0-e79de3b215d8@weissschuh.net

---
Thomas Weißschuh (13):
      tools/nolibc/poll: use kernel types for system call invocations
      tools/nolibc/poll: drop __NR_poll fallback
      tools/nolibc/select: drop non-pselect based implementations
      tools/nolibc/time: drop invocation of gettimeofday system call
      tools/nolibc: prefer explicit 64-bit time-related system calls
      tools/nolibc/gettimeofday: avoid libgcc 64-bit divisions
      tools/nolibc/select: avoid libgcc 64-bit multiplications
      tools/nolibc: use custom structs timespec and timeval
      tools/nolibc: always use 64-bit time types
      selftests/nolibc: test compatibility of nolibc and kernel time types
      tools/nolibc: remove time conversions
      tools/nolibc: add __nolibc_static_assert()
      selftests/nolibc: add static assertions around time types handling

 tools/include/nolibc/arch-s390.h             |   3 +
 tools/include/nolibc/compiler.h              |   2 +
 tools/include/nolibc/poll.h                  |  14 ++--
 tools/include/nolibc/std.h                   |   2 +-
 tools/include/nolibc/sys/select.h            |  25 ++-----
 tools/include/nolibc/sys/time.h              |   6 +-
 tools/include/nolibc/sys/timerfd.h           |  32 +++------
 tools/include/nolibc/time.h                  | 102 +++++++++------------------
 tools/include/nolibc/types.h                 |  17 ++++-
 tools/testing/selftests/nolibc/nolibc-test.c |  27 +++++++
 10 files changed, 107 insertions(+), 123 deletions(-)
---
base-commit: 586e8d5137dfcddfccca44c3b992b92d2be79347
change-id: 20251001-nolibc-uapi-types-1c072d10fcc7

Best regards,
-- 
Thomas Weißschuh <linux@...ssschuh.net>