linux-kernel - [PATCH 02/23] y2038: add __kernel_old_timespec and __kernel_old_time

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Message-Id: <20191108210824.1534248-2-arnd@arndb.de>
Date:   Fri,  8 Nov 2019 22:07:22 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     y2038@...ts.linaro.org, Arnd Bergmann <arnd@...db.de>
Cc:     linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        linux-arch@...r.kernel.org
Subject: [PATCH 02/23] y2038: add __kernel_old_timespec and __kernel_old_time_t

The 'struct timespec' definition can no longer be part of the uapi headers
because it conflicts with a a now incompatible libc definition. Also,
we really want to remove it in order to prevent new uses from creeping in.

The same namespace conflict exists with time_t, which should also be
removed. __kernel_time_t could be used safely, but adding 'old' in the
name makes it clearer that this should not be used for new interfaces.

Add a replacement __kernel_old_timespec structure and __kernel_old_time_t
along the lines of __kernel_old_timeval.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 include/uapi/asm-generic/posix_types.h | 1 +
 include/uapi/linux/time_types.h        | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/include/uapi/asm-generic/posix_types.h b/include/uapi/asm-generic/posix_types.h
index f0733a26ebfc..2f9c80595ba7 100644
--- a/include/uapi/asm-generic/posix_types.h
+++ b/include/uapi/asm-generic/posix_types.h
@@ -86,6 +86,7 @@ typedef struct {
  */
 typedef __kernel_long_t	__kernel_off_t;
 typedef long long	__kernel_loff_t;
+typedef __kernel_long_t	__kernel_old_time_t;
 typedef __kernel_long_t	__kernel_time_t;
 typedef long long __kernel_time64_t;
 typedef __kernel_long_t	__kernel_clock_t;
diff --git a/include/uapi/linux/time_types.h b/include/uapi/linux/time_types.h
index 27bfc8fc6904..60b37f29842d 100644
--- a/include/uapi/linux/time_types.h
+++ b/include/uapi/linux/time_types.h
@@ -28,6 +28,11 @@ struct __kernel_old_timeval {
 };
 #endif
 
+struct __kernel_old_timespec {
+	__kernel_time_t	tv_sec;			/* seconds */
+	long		tv_nsec;		/* nanoseconds */
+};
+
 struct __kernel_sock_timeval {
 	__s64 tv_sec;
 	__s64 tv_usec;
-- 
2.20.0