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sh: cmpxchg: fix a bit shift bug in big_endian os
Correct bitoff in big endian OS.
Current code works correctly for 1 byte but not for 2 bytes.
Fixes: 3226aad81a
("sh: support 1 and 2 byte xchg")
Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rich Felker <dalias@libc.org>
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1 changed files with 1 additions and 1 deletions
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@ -21,7 +21,7 @@ static inline u32 __xchg_cmpxchg(volatile void *ptr, u32 x, int size)
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int off = (unsigned long)ptr % sizeof(u32);
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volatile u32 *p = ptr - off;
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#ifdef __BIG_ENDIAN
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int bitoff = (sizeof(u32) - 1 - off) * BITS_PER_BYTE;
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int bitoff = (sizeof(u32) - size - off) * BITS_PER_BYTE;
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#else
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int bitoff = off * BITS_PER_BYTE;
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#endif
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