From f15cbe6f1a4b4d9df59142fc8e4abb973302cf44 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Tue, 29 Jul 2008 08:09:44 +0900 Subject: sh: migrate to arch/sh/include/ This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac. Most of the moving about was done with Sam's directions at: http://marc.info/?l=linux-sh&m=121724823706062&w=2 with subsequent hacking and fixups entirely my fault. Signed-off-by: Sam Ravnborg Signed-off-by: Paul Mundt --- arch/sh/include/asm/cmpxchg-irq.h | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 arch/sh/include/asm/cmpxchg-irq.h (limited to 'arch/sh/include/asm/cmpxchg-irq.h') 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 */ -- cgit v1.2.3-70-g09d2