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Commitfd991a2

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arndbKAGA-KOKO
authored andcommitted
y2038: Provide aliases for compat helpers
As part of the system call rework for 64-bit time_t, we are restructuringthe way that compat syscalls deal with 32-bit time_t, reusing theimplementation for 32-bit architectures. Christoph Hellwig suggested arename of the associated types and interfaces to avoid the confusing usageof the 'compat' prefix for 32-bit architectures.To prepare for doing that in linux-4.20, add a set of macros that allows toconvert subsystems separately to the new names and avoids some of thenastier 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.orgCc: 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
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‎include/linux/time32.h‎

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@@ -207,4 +207,19 @@ static inline s64 timeval_to_ns(const struct timeval *tv)
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externstructtimevalns_to_timeval(consts64nsec);
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externstruct__kernel_old_timevalns_to_kernel_old_timeval(s64nsec);
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/*
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* New aliases for compat time functions. These will be used to replace
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* the compat code so it can be shared between 32-bit and 64-bit builds
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* both of which provide compatibility with old 32-bit tasks.
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*/
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#defineold_time32_tcompat_time_t
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#defineold_timeval32compat_timeval
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#defineold_timespec32compat_timespec
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#defineold_itimerspec32compat_itimerspec
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#definens_to_old_timeval32ns_to_compat_timeval
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#defineget_old_itimerspec32get_compat_itimerspec64
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#defineput_old_itimerspec32put_compat_itimerspec64
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#defineget_old_timespec32compat_get_timespec64
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#defineput_old_timespec32compat_put_timespec64
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#endif

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