(2013/11/23 6:21), Andi Kleen wrote: > On Wed, Nov 20, 2013 at 04:22:21AM +0000, Masami Hiramatsu wrote: >> Use NOKPROBE_SYMBOL macro to protect functions from kprobes >> instead of __kprobes annotation in trap.c. >> This also applies __always_inline annotation for some cases, >> because NOKPROBE_SYMBOL() will inhibit inlining by referring >> the symbol address. > > NOKPROBE_SYMBOL seems to add a reference from some variable to the function? > > With LTO we can optimize away unused functions, but not > when there are references to the symbol. So this would likely > prevent optimizations with LTO. Hmm, indeed. I think I can remove the function reference if the function name is unique, because the macro also stores the name. In that case, even if the function itself is optimized out and there is no entry in kallsyms, we can just ignore it when init the blacklist. Thank you, -- Masami HIRAMATSU IT Management Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@xxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
