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| author |   Arnd Bergmann <arnd@arndb.de> | 2017-11-23 14:29:37 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2019-11-15 14:38:27 +0100 |
| commit | ddccf40fe82b7ac7c44b186ec4b6d1d1bbc2cbff (patch) | |
| tree | 72fb6a1393d55066a99f14ebbd63a721b457dcb4 /arch/nds32 | |
| parent | y2038: add __kernel_old_timespec and __kernel_old_time_t (diff) | |
| download | wireguard-linux-ddccf40fe82b7ac7c44b186ec4b6d1d1bbc2cbff.tar.xz wireguard-linux-ddccf40fe82b7ac7c44b186ec4b6d1d1bbc2cbff.zip | |
y2038: vdso: change timeval to __kernel_old_timeval
The gettimeofday() function in vdso uses the traditional 'timeval'
structure layout, which will be incompatible with future versions of
glibc on 32-bit architectures that use a 64-bit time_t.
This interface is problematic for y2038, when time_t overflows on 32-bit
architectures, but the plan so far is that a libc with 64-bit time_t
will not call into the gettimeofday() vdso helper at all, and only
have a method for entering clock_gettime(). This means we don't have
to fix it here, though we probably want to add a new clock_gettime()
entry point using a 64-bit version of 'struct timespec' at some point.
Changing the vdso code to use __kernel_old_timeval helps isolate
this usage from the other ones that still need to be fixed properly,
and it gets us closer to removing the 'timeval' definition from the
kernel sources.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/nds32')
| -rw-r--r-- | arch/nds32/kernel/vdso/gettimeofday.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/nds32/kernel/vdso/gettimeofday.c b/arch/nds32/kernel/vdso/gettimeofday.c index b02581891c33..1e69fd5b067b 100644 --- a/arch/nds32/kernel/vdso/gettimeofday.c +++ b/arch/nds32/kernel/vdso/gettimeofday.c @@ -230,10 +230,10 @@ notrace int __vdso_clock_getres(clockid_t clk_id, struct timespec *res) return 0; } -static notrace inline int gettimeofday_fallback(struct timeval *_tv, +static notrace inline int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz) { - register struct timeval *tv asm("$r0") = _tv; + register struct __kernel_old_timeval *tv asm("$r0") = _tv; register struct timezone *tz asm("$r1") = _tz; register int ret asm("$r0"); @@ -246,7 +246,7 @@ static notrace inline int gettimeofday_fallback(struct timeval *_tv, return ret; } -notrace int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz) +notrace int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) { struct timespec ts; struct vdso_data *vdata; |