arch/x86/lib/pc-conf-reg.c

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