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Viewing changes to arch/x86/include/asm/rwlock.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/x86/include/asm/rwlock.h
 
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#ifndef _ASM_X86_RWLOCK_H
 
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#define _ASM_X86_RWLOCK_H
 
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#include <asm/asm.h>
 
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#if CONFIG_NR_CPUS <= 2048
 
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#ifndef __ASSEMBLY__
 
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typedef union {
 
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        s32 lock;
 
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        s32 write;
 
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} arch_rwlock_t;
 
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#endif
 
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#define RW_LOCK_BIAS            0x00100000
 
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#define READ_LOCK_SIZE(insn)    __ASM_FORM(insn##l)
 
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#define READ_LOCK_ATOMIC(n)     atomic_##n
 
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#define WRITE_LOCK_ADD(n)       __ASM_FORM_COMMA(addl n)
 
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#define WRITE_LOCK_SUB(n)       __ASM_FORM_COMMA(subl n)
 
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#define WRITE_LOCK_CMP          RW_LOCK_BIAS
 
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#else /* CONFIG_NR_CPUS > 2048 */
 
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#include <linux/const.h>
 
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#ifndef __ASSEMBLY__
 
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typedef union {
 
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        s64 lock;
 
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        struct {
 
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                u32 read;
 
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                s32 write;
 
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        };
 
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} arch_rwlock_t;
 
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#endif
 
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#define RW_LOCK_BIAS            (_AC(1,L) << 32)
 
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#define READ_LOCK_SIZE(insn)    __ASM_FORM(insn##q)
 
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#define READ_LOCK_ATOMIC(n)     atomic64_##n
 
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#define WRITE_LOCK_ADD(n)       __ASM_FORM(incl)
 
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#define WRITE_LOCK_SUB(n)       __ASM_FORM(decl)
 
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#define WRITE_LOCK_CMP          1
 
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#endif /* CONFIG_NR_CPUS */
 
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#define __ARCH_RW_LOCK_UNLOCKED         { RW_LOCK_BIAS }
 
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/* Actual code is in asm/spinlock.h or in arch/x86/lib/rwlock.S */
 
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#endif /* _ASM_X86_RWLOCK_H */