diff options
Diffstat (limited to 'arch/x86/include/asm/spinlock_types.h')
-rw-r--r-- | arch/x86/include/asm/spinlock_types.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/x86/include/asm/spinlock_types.h b/arch/x86/include/asm/spinlock_types.h new file mode 100644 index 000000000..5f9d7572d --- /dev/null +++ b/arch/x86/include/asm/spinlock_types.h @@ -0,0 +1,39 @@ +#ifndef _ASM_X86_SPINLOCK_TYPES_H +#define _ASM_X86_SPINLOCK_TYPES_H + +#include <linux/types.h> + +#ifdef CONFIG_PARAVIRT_SPINLOCKS +#define __TICKET_LOCK_INC 2 +#define TICKET_SLOWPATH_FLAG ((__ticket_t)1) +#else +#define __TICKET_LOCK_INC 1 +#define TICKET_SLOWPATH_FLAG ((__ticket_t)0) +#endif + +#if (CONFIG_NR_CPUS < (256 / __TICKET_LOCK_INC)) +typedef u8 __ticket_t; +typedef u16 __ticketpair_t; +#else +typedef u16 __ticket_t; +typedef u32 __ticketpair_t; +#endif + +#define TICKET_LOCK_INC ((__ticket_t)__TICKET_LOCK_INC) + +#define TICKET_SHIFT (sizeof(__ticket_t) * 8) + +typedef struct arch_spinlock { + union { + __ticketpair_t head_tail; + struct __raw_tickets { + __ticket_t head, tail; + } tickets; + }; +} arch_spinlock_t; + +#define __ARCH_SPIN_LOCK_UNLOCKED { { 0 } } + +#include <asm-generic/qrwlock_types.h> + +#endif /* _ASM_X86_SPINLOCK_TYPES_H */ |