arch/x86/kernel/paravirt-spinlocks.c

   1 /*
   2  * Split spinlock implementation out into its own file, so it can be
   3  * compiled in a FTRACE-compatible way.
   4  */
   5 #include <linux/spinlock.h>
   6 #include <linux/module.h>
   7
   8 #include <asm/paravirt.h>
   9
  10 struct pv_lock_ops pv_lock_ops = {
  11 #ifdef CONFIG_SMP
  12         .spin_is_locked = __ticket_spin_is_locked,
  13         .spin_is_contended = __ticket_spin_is_contended,
  14
  15         .spin_lock = __ticket_spin_lock,
  16         .spin_trylock = __ticket_spin_trylock,
  17         .spin_unlock = __ticket_spin_unlock,
  18 #endif
  19 };
  20 EXPORT_SYMBOL_GPL(pv_lock_ops);
  21
  22 void __init paravirt_use_bytelocks(void)
  23 {
  24 #ifdef CONFIG_SMP
  25         pv_lock_ops.spin_is_locked = __byte_spin_is_locked;
  26         pv_lock_ops.spin_is_contended = __byte_spin_is_contended;
  27         pv_lock_ops.spin_lock = __byte_spin_lock;
  28         pv_lock_ops.spin_trylock = __byte_spin_trylock;
  29         pv_lock_ops.spin_unlock = __byte_spin_unlock;
  30 #endif
  31 }