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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: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
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