RE: [RFC] net: bpf_jit: Two pass JIT and other changes

From: David Laight
Date: Mon Apr 02 2012 - 05:29:26 EST



> 1) Sadly, gcc isn't always smart enough to inline emit_code().
> So turn it into a macro to force gcc to inline it. This saves
> about 500 bytes. Tested with gcc 4.6.0. An alternative to the
> macro would be to create inline emit_code1(), emit_code2() etc.

Does giving it the __attribute__((always_inline)) help?
I had to mark a load of small static functions that way
after a minor change (possibly to the overall size)
stopped gcc inlining everything.

I have also noticed in the past that gcc tends to generate
better code for #define than when inlining functions.

David


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/