1*fb6a0408SMaciej W. Rozycki // SPDX-License-Identifier: GPL-2.0 2*fb6a0408SMaciej W. Rozycki /* 3*fb6a0408SMaciej W. Rozycki * Support for the configuration register space at port I/O locations 4*fb6a0408SMaciej W. Rozycki * 0x22 and 0x23 variously used by PC architectures, e.g. the MP Spec, 5*fb6a0408SMaciej W. Rozycki * Cyrix CPUs, numerous chipsets. As the space is indirectly addressed 6*fb6a0408SMaciej W. Rozycki * it may have to be protected with a spinlock, depending on the context. 7*fb6a0408SMaciej W. Rozycki */ 8*fb6a0408SMaciej W. Rozycki 9*fb6a0408SMaciej W. Rozycki #include <linux/spinlock.h> 10*fb6a0408SMaciej W. Rozycki 11*fb6a0408SMaciej W. Rozycki #include <asm/pc-conf-reg.h> 12*fb6a0408SMaciej W. Rozycki 13*fb6a0408SMaciej W. Rozycki DEFINE_RAW_SPINLOCK(pc_conf_lock); 14