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Fix compilation of drivers with -O0
It is sometimes useful to compile individual drivers with optimization disabled for easier debugging. Currently drivers which use htonl() and similar functions don't compile with -O0. This patch fixes it. It also removes obsolete and misleading comments. This header is not for userspace, so we don't have to care about strange programs these comments mention. (akpm: -O0 probably isn't a good idea, but this code looks pretty crufty and unuseful) Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -124,19 +124,8 @@
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#define be32_to_cpus __be32_to_cpus
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#define cpu_to_be16s __cpu_to_be16s
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#define be16_to_cpus __be16_to_cpus
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#endif
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#if defined(__KERNEL__)
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/*
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* Handle ntohl and suches. These have various compatibility
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* issues - like we want to give the prototype even though we
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* also have a macro for them in case some strange program
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* wants to take the address of the thing or something..
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*
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* Note that these used to return a "long" in libc5, even though
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* long is often 64-bit these days.. Thus the casts.
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*
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* They have to be macros in order to do the constant folding
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* correctly - if the argument passed into a inline function
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* it is no longer constant according to gcc..
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@ -147,17 +136,6 @@
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#undef htonl
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#undef htons
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/*
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* Do the prototypes. Somebody might want to take the
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* address or some such sick thing..
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*/
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extern __u32 ntohl(__be32);
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extern __be32 htonl(__u32);
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extern __u16 ntohs(__be16);
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extern __be16 htons(__u16);
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#if defined(__GNUC__) && defined(__OPTIMIZE__)
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#define ___htonl(x) __cpu_to_be32(x)
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#define ___htons(x) __cpu_to_be16(x)
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#define ___ntohl(x) __be32_to_cpu(x)
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@ -168,9 +146,6 @@ extern __be16 htons(__u16);
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#define htons(x) ___htons(x)
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#define ntohs(x) ___ntohs(x)
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#endif /* OPTIMIZE */
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#endif /* KERNEL */
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#endif /* _LINUX_BYTEORDER_GENERIC_H */
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