linux-kernel - [PATCH v2 08/13] tools/nolibc: use custom structs timespec and timeval

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Message-Id: <20251122-nolibc-uapi-types-v2-8-b814a43654f5@weissschuh.net>
Date: Sat, 22 Nov 2025 17:59:14 +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 08/13] tools/nolibc: use custom structs timespec and
 timeval

A custom 'struct timespec' and 'struct timeval' will be necessary for
64-bit time types on 32-bit architectures. <linux/time.h> will define
other time-related types in terms of the custom 'struct timespec'.

Add custom struct definitions which for now mirror exactly the ones from
the UAPI headers, but provide the foundation for further changes.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 tools/include/nolibc/arch-s390.h |  3 +++
 tools/include/nolibc/types.h     | 16 +++++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/tools/include/nolibc/arch-s390.h b/tools/include/nolibc/arch-s390.h
index 6237211385c0..1e87ac42ab9c 100644
--- a/tools/include/nolibc/arch-s390.h
+++ b/tools/include/nolibc/arch-s390.h
@@ -5,6 +5,9 @@
 
 #ifndef _NOLIBC_ARCH_S390_H
 #define _NOLIBC_ARCH_S390_H
+
+#include "types.h"
+
 #include <linux/signal.h>
 #include <linux/unistd.h>
 
diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h
index 470a5f77bc0f..5d180ffabcb6 100644
--- a/tools/include/nolibc/types.h
+++ b/tools/include/nolibc/types.h
@@ -13,9 +13,23 @@
 #include "std.h"
 #include <linux/mman.h>
 #include <linux/stat.h>
-#include <linux/time.h>
+#include <linux/time_types.h>
 #include <linux/wait.h>
 
+struct timespec {
+	__kernel_old_time_t	tv_sec;
+	long			tv_nsec;
+};
+#define _STRUCT_TIMESPEC
+
+struct timeval {
+	__kernel_old_time_t	tv_sec;
+	__kernel_suseconds_t	tv_usec;
+};
+
+#define timeval __nolibc_kernel_timeval
+#include <linux/time.h>
+#undef timeval
 
 /* Only the generic macros and types may be defined here. The arch-specific
  * ones such as the O_RDONLY and related macros used by fcntl() and open()

-- 
2.52.0