net: mdiobus: Disable preemption upon u64_stats update
The u64_stats mechanism uses sequence counters to protect against 64-bit values tearing on 32-bit architectures. Updating u64_stats is thus a sequence counter write side critical section where preemption must be disabled. For mdiobus_stats_acct(), disable preemption upon the u64_stats update. It is called from process context through mdiobus_read() and mdiobus_write(). Reported-by: Nkernel test robot <lkp@intel.com> Signed-off-by: NAhmed S. Darwish <a.darwish@linutronix.de> Reviewed-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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