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use_lock flag is used once for acpi_hw_register_read, and never for acpi_hw_register_write. It will greatly simplify understanding of locking if we just drop this use_lock altogether, and wrap the only call to ..._read in lock/unlock. Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>