diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-13 11:05:51 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-13 11:05:51 +0200 |
commit | accba5f3965d6a9d1bf7c1e1a7995d17e9d521b6 (patch) | |
tree | 8fb40782e79472ed882ff2098d4dd295557278ee /arch/sh/include/asm/cmpxchg-irq.h | |
parent | 6852fd9b86d05063c6ef49d2e12e061cc7f6a105 (diff) | |
parent | 4480f15b3306f43bbb0310d461142b4e897ca45b (diff) |
Merge branch 'linus' into oprofile-v2
Conflicts:
arch/x86/kernel/apic_32.c
arch/x86/oprofile/nmi_int.c
include/linux/pci_ids.h
Diffstat (limited to 'arch/sh/include/asm/cmpxchg-irq.h')
-rw-r--r-- | arch/sh/include/asm/cmpxchg-irq.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/sh/include/asm/cmpxchg-irq.h b/arch/sh/include/asm/cmpxchg-irq.h new file mode 100644 index 00000000000..43049ec0554 --- /dev/null +++ b/arch/sh/include/asm/cmpxchg-irq.h @@ -0,0 +1,40 @@ +#ifndef __ASM_SH_CMPXCHG_IRQ_H +#define __ASM_SH_CMPXCHG_IRQ_H + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + unsigned long flags, retval; + + local_irq_save(flags); + retval = *m; + *m = val; + local_irq_restore(flags); + return retval; +} + +static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) +{ + unsigned long flags, retval; + + local_irq_save(flags); + retval = *m; + *m = val & 0xff; + local_irq_restore(flags); + return retval; +} + +static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, + unsigned long new) +{ + __u32 retval; + unsigned long flags; + + local_irq_save(flags); + retval = *m; + if (retval == old) + *m = new; + local_irq_restore(flags); /* implies memory barrier */ + return retval; +} + +#endif /* __ASM_SH_CMPXCHG_IRQ_H */ |