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btrfs-progs: kerncompat: introduce get_unaligned helpers 

Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2016-05-03 15:59:45 +02:00
parent 9971f00edd
commit a6ffadee7b
1 changed files with 4 additions and 0 deletions
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4
kerncompat.h
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@ -334,12 +334,16 @@ struct __una_u32 { __le32 x; } __attribute__((__packed__));
struct __una_u64 { __le64 x; } __attribute__((__packed__));
#define get_unaligned_le8(p) (*((u8 *)(p)))
#define get_unaligned_8(p) (*((u8 *)(p)))
#define put_unaligned_le8(val,p) ((*((u8 *)(p))) = (val))
#define get_unaligned_le16(p) le16_to_cpu(((const struct __una_u16 *)(p))->x)
#define get_unaligned_16(p) (((const struct __una_u16 *)(p))->x)
#define put_unaligned_le16(val,p) (((struct __una_u16 *)(p))->x = cpu_to_le16(val))
#define get_unaligned_le32(p) le32_to_cpu(((const struct __una_u32 *)(p))->x)
#define get_unaligned_32(p) (((const struct __una_u32 *)(p))->x)
#define put_unaligned_le32(val,p) (((struct __una_u32 *)(p))->x = cpu_to_le32(val))
#define get_unaligned_le64(p) le64_to_cpu(((const struct __una_u64 *)(p))->x)
#define get_unaligned_64(p) (((const struct __una_u64 *)(p))->x)
#define put_unaligned_le64(val,p) (((struct __una_u64 *)(p))->x = cpu_to_le64(val))
#ifndef true