From: "Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
To: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
Andrew Lunn <andrew@lunn.ch>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Jozsef Kadlecsik <kadlec@netfilter.org>,
Florian Westphal <fw@strlen.de>, Phil Sutter <phil@nwl.cc>
Cc: "Arnd Bergmann" <arnd@arndb.de>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
Subject: [PATCH v2 1/3] uapi: add INT_MAX and INT_MIN constants
Date: Tue, 13 Jan 2026 08:44:17 +0100 [thread overview]
Message-ID: <20260113-uapi-limits-v2-1-93c20f4b2c1a@linutronix.de> (raw)
In-Reply-To: <20260113-uapi-limits-v2-0-93c20f4b2c1a@linutronix.de>
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>
---
include/uapi/linux/typelimits.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/uapi/linux/typelimits.h b/include/uapi/linux/typelimits.h
new file mode 100644
index 000000000000..8166c639b518
--- /dev/null
+++ b/include/uapi/linux/typelimits.h
@@ -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 */
--
2.52.0
next prev parent reply other threads:[~2026-01-13 7:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-13 7:44 [PATCH v2 0/3] uapi: Use UAPI definitions of INT_MAX and INT_MIN Thomas Weißschuh
2026-01-13 7:44 ` Thomas Weißschuh [this message]
2026-01-13 7:44 ` [PATCH v2 2/3] ethtool: uapi: Use UAPI definition of INT_MAX Thomas Weißschuh
2026-01-13 7:44 ` [PATCH v2 3/3] netfilter: uapi: Use UAPI definition of INT_MAX and INT_MIN Thomas Weißschuh
2026-01-19 14:19 ` [PATCH v2 0/3] uapi: Use UAPI definitions " patchwork-bot+netdevbpf
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