Messages in this thread | | | Date | Mon, 2 Apr 2012 22:03:12 +1000 | Subject | RE: [RFC] net: bpf_jit: Two pass JIT and other changes | From | "Indan Zupancic" <> |
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On Mon, April 2, 2012 19:28, David Laight wrote: > >> 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 did try that first, but it didn't work for some reason. Perhaps the kernel uses some flag that overrides it when optimising for size. Maybe plain -Os does that already, I don't know.
Greetings,
Indan
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