Commit 6c260d58 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by John Stultz

x86: vdso: Remove bogus locking in update_vsyscall_tz()

Changing the sequence count in update_vsyscall_tz() is completely
pointless.

The vdso code copies the data unprotected. There is no point to change
this as sys_tz is nowhere protected at all. See sys_gettimeofday().
Reviewed-by: default avatarAndy Lutomirski <luto@amacapital.net>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz's avatarJohn Stultz <john.stultz@linaro.org>
parent a4ca1298
......@@ -80,12 +80,7 @@ early_param("vsyscall", vsyscall_setup);
void update_vsyscall_tz(void)
{
unsigned long flags;
write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
/* sys_tz has changed */
vsyscall_gtod_data.sys_tz = sys_tz;
write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
}
void update_vsyscall(struct timespec *wall_time, struct timespec *wtm,
......
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