diff options
Diffstat (limited to 'kernel/arch/avr32/include/uapi/asm/swab.h')
-rw-r--r-- | kernel/arch/avr32/include/uapi/asm/swab.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/kernel/arch/avr32/include/uapi/asm/swab.h b/kernel/arch/avr32/include/uapi/asm/swab.h new file mode 100644 index 000000000..1a03549e7 --- /dev/null +++ b/kernel/arch/avr32/include/uapi/asm/swab.h @@ -0,0 +1,35 @@ +/* + * AVR32 byteswapping functions. + */ +#ifndef _UAPI__ASM_AVR32_SWAB_H +#define _UAPI__ASM_AVR32_SWAB_H + +#include <linux/types.h> +#include <linux/compiler.h> + +#define __SWAB_64_THRU_32__ + +#ifdef __CHECKER__ +extern unsigned long __builtin_bswap_32(unsigned long x); +extern unsigned short __builtin_bswap_16(unsigned short x); +#endif + +/* + * avr32-linux-gcc versions earlier than 4.2 improperly sign-extends + * the result. + */ +#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2) +static inline __attribute_const__ __u16 __arch_swab16(__u16 val) +{ + return __builtin_bswap_16(val); +} +#define __arch_swab16 __arch_swab16 + +static inline __attribute_const__ __u32 __arch_swab32(__u32 val) +{ + return __builtin_bswap_32(val); +} +#define __arch_swab32 __arch_swab32 +#endif + +#endif /* _UAPI__ASM_AVR32_SWAB_H */ |