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a77f9c5dcd
This reverts commite5a2c89995. Commite5a2c899introduced an alternative_call, arch_fast_hash2, that selects between __jhash2 and __intel_crc4_2_hash based on the X86_FEATURE_XMM4_2. Unfortunately, the alternative_call system does not appear to be suitable for use with C functions, as register usage is not handled properly for the called functions. The __jhash2 function in particular clobbers registers that are not preserved when called via alternative_call, resulting in a panic for direct callers of arch_fast_hash2 on older CPUs lacking sse4_2. It is possible that __intel_crc4_2_hash works merely by chance because it uses fewer registers. This commit was suggested as the source of the problem by Jesse Gross <jesse@nicira.com>. Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
10 lines
187 B
C
10 lines
187 B
C
#ifndef __ASM_GENERIC_HASH_H
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#define __ASM_GENERIC_HASH_H
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struct fast_hash_ops;
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static inline void setup_arch_fast_hash(struct fast_hash_ops *ops)
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{
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}
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#endif /* __ASM_GENERIC_HASH_H */
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