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lib: export bitrev16

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Bluetooth will be able to use this.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Dave Young <hidave.darkstar@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Harvey Harrison 2008-06-05 22:46:19 -07:00 committed by Linus Torvalds
parent f2eb432715
commit 3527fb326f
2 changed files with 3 additions and 1 deletions
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1
include/linux/bitrev.h
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@ -10,6 +10,7 @@ static inline u8 bitrev8(u8 byte)
return byte_rev_table[byte]; return byte_rev_table[byte];
} }
extern u16 bitrev16(u16 in);
extern u32 bitrev32(u32 in); extern u32 bitrev32(u32 in);
#endif /* _LINUX_BITREV_H */ #endif /* _LINUX_BITREV_H */

3
lib/bitrev.c
View file

@ -42,10 +42,11 @@ const u8 byte_rev_table[256] = {
}; };
EXPORT_SYMBOL_GPL(byte_rev_table); EXPORT_SYMBOL_GPL(byte_rev_table);
static __always_inline u16 bitrev16(u16 x) u16 bitrev16(u16 x)
{ {
return (bitrev8(x & 0xff) << 8) | bitrev8(x >> 8); return (bitrev8(x & 0xff) << 8) | bitrev8(x >> 8);
} }
EXPORT_SYMBOL(bitrev16);
/** /**
* bitrev32 - reverse the order of bits in a u32 value * bitrev32 - reverse the order of bits in a u32 value