a07f7672d7
There are various hostprogs in the kernel that are rolling their own
implementations of {get,put}_unaligned_le*(). Copy the byteshift
headers from include/linux/unaligned so that they can all use a single
implementation.
This requires changing some of the data types to the userspace
exported ones (u32 -> __u32, etc).
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Link: http://lkml.kernel.org/r/1330436245-24875-2-git-send-email-matt@console-pimps.org
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
#ifndef _TOOLS_LE_BYTESHIFT_H
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#define _TOOLS_LE_BYTESHIFT_H
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#include <linux/types.h>
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static inline __u16 __get_unaligned_le16(const __u8 *p)
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{
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return p[0] | p[1] << 8;
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}
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static inline __u32 __get_unaligned_le32(const __u8 *p)
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{
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return p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
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}
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static inline __u64 __get_unaligned_le64(const __u8 *p)
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{
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return (__u64)__get_unaligned_le32(p + 4) << 32 |
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__get_unaligned_le32(p);
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}
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static inline void __put_unaligned_le16(__u16 val, __u8 *p)
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{
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*p++ = val;
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*p++ = val >> 8;
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}
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static inline void __put_unaligned_le32(__u32 val, __u8 *p)
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{
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__put_unaligned_le16(val >> 16, p + 2);
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__put_unaligned_le16(val, p);
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}
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static inline void __put_unaligned_le64(__u64 val, __u8 *p)
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{
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__put_unaligned_le32(val >> 32, p + 4);
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__put_unaligned_le32(val, p);
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}
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static inline __u16 get_unaligned_le16(const void *p)
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{
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return __get_unaligned_le16((const __u8 *)p);
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}
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static inline __u32 get_unaligned_le32(const void *p)
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{
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return __get_unaligned_le32((const __u8 *)p);
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}
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static inline __u64 get_unaligned_le64(const void *p)
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{
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return __get_unaligned_le64((const __u8 *)p);
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}
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static inline void put_unaligned_le16(__u16 val, void *p)
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{
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__put_unaligned_le16(val, p);
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}
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static inline void put_unaligned_le32(__u32 val, void *p)
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{
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__put_unaligned_le32(val, p);
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}
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static inline void put_unaligned_le64(__u64 val, void *p)
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{
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__put_unaligned_le64(val, p);
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}
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#endif /* _TOOLS_LE_BYTESHIFT_H */
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