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uapi: add INT_MAX and INT_MIN constants

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Some UAPI headers use INT_MAX and INT_MIN. Currently they include
<limits.h> for their definitions, which introduces a problematic
dependency on libc.

Add custom, namespaced definitions of INT_MAX and INT_MIN using the
same values as the regular kernel code.
These definitions are not added to uapi/linux/limits.h, as that header
will conflict with libc definitions on some platforms.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://patch.msgid.link/20260113-uapi-limits-v2-1-93c20f4b2c1a@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Thomas Weißschuh
2026-01-13 08:44:17 +01:00
committed by Jakub Kicinski
parent 171e8ed482
commit ca9d74eb5f
1 changed files with 8 additions and 0 deletions
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8
include/uapi/linux/typelimits.h Normal file
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@@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_TYPELIMITS_H
#define _UAPI_LINUX_TYPELIMITS_H
#define __KERNEL_INT_MAX ((int)(~0U >> 1))
#define __KERNEL_INT_MIN (-__KERNEL_INT_MAX - 1)
#endif /* _UAPI_LINUX_TYPELIMITS_H */