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authorArnd Bergmann <arnd@arndb.de>2018-08-21 22:33:00 +0200
committerThomas Gleixner <tglx@linutronix.de>2018-08-22 15:11:35 +0200
commitfd991a23c8f6ef30692f77409602ccf3614353b2 (patch)
tree212ebd0eeb1ce42e71f1d6d592dc3d35a9ce53a9
parentf19f5c49bbc3ffcc9126cc245fc1b24cc29f4a37 (diff)
download96b-common-fd991a23c8f6ef30692f77409602ccf3614353b2.tar.gz
y2038: Provide aliases for compat helpers
As part of the system call rework for 64-bit time_t, we are restructuring the way that compat syscalls deal with 32-bit time_t, reusing the implementation for 32-bit architectures. Christoph Hellwig suggested a rename of the associated types and interfaces to avoid the confusing usage of the 'compat' prefix for 32-bit architectures. To prepare for doing that in linux-4.20, add a set of macros that allows to convert subsystems separately to the new names and avoids some of the nastier merge conflicts. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: y2038@lists.linaro.org Cc: John Stultz <john.stultz@linaro.org> Cc: Deepa Dinamani <deepa.kernel@gmail.com> Link: https://lkml.kernel.org/r/20180821203329.2089473-1-arnd@arndb.de
-rw-r--r--include/linux/time32.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/time32.h b/include/linux/time32.h
index 0b14f936100a..d1ae43c13e25 100644
--- a/include/linux/time32.h
+++ b/include/linux/time32.h
@@ -207,4 +207,19 @@ static inline s64 timeval_to_ns(const struct timeval *tv)
extern struct timeval ns_to_timeval(const s64 nsec);
extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec);
+/*
+ * New aliases for compat time functions. These will be used to replace
+ * the compat code so it can be shared between 32-bit and 64-bit builds
+ * both of which provide compatibility with old 32-bit tasks.
+ */
+#define old_time32_t compat_time_t
+#define old_timeval32 compat_timeval
+#define old_timespec32 compat_timespec
+#define old_itimerspec32 compat_itimerspec
+#define ns_to_old_timeval32 ns_to_compat_timeval
+#define get_old_itimerspec32 get_compat_itimerspec64
+#define put_old_itimerspec32 put_compat_itimerspec64
+#define get_old_timespec32 compat_get_timespec64
+#define put_old_timespec32 compat_put_timespec64
+
#endif