MIPS: make oprofile use cp0_perfcount_irq if it is set
Make the oprofile code use the performance counters irq. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John Crispin <blogic@openwrt.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/3723/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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