229855d6f3
Make trylock code common regardless of ticket size. (Also, rename arch_spinlock.slock to head_tail.) Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Link: http://lkml.kernel.org/r/4E5BCC40.3030501@goop.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
35 lines
703 B
C
35 lines
703 B
C
#ifndef _ASM_X86_SPINLOCK_TYPES_H
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#define _ASM_X86_SPINLOCK_TYPES_H
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#ifndef __LINUX_SPINLOCK_TYPES_H
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# error "please don't include this file directly"
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#endif
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#include <linux/types.h>
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#if (CONFIG_NR_CPUS < 256)
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typedef u8 __ticket_t;
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typedef u16 __ticketpair_t;
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#else
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typedef u16 __ticket_t;
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typedef u32 __ticketpair_t;
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#endif
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#define TICKET_SHIFT (sizeof(__ticket_t) * 8)
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#define TICKET_MASK ((__ticket_t)((1 << TICKET_SHIFT) - 1))
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typedef struct arch_spinlock {
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union {
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__ticketpair_t head_tail;
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struct __raw_tickets {
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__ticket_t head, tail;
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} tickets;
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};
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} arch_spinlock_t;
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#define __ARCH_SPIN_LOCK_UNLOCKED { { 0 } }
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#include <asm/rwlock.h>
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#endif /* _ASM_X86_SPINLOCK_TYPES_H */
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