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* Ingo Molnar <mingo@elte.hu> wrote: > * Linus Torvalds <torvalds@osdl.org> wrote: > > > I wonder if we should remove the "volatile". There really isn't > > anything _good_ that gcc can do with it, but we've seen gcc code > > generation do stupid things before just because "volatile" seems to > > just disable even proper normal working. > > yeah. I tried this and it indeed slashed 42K off text size (0.2%): > > text data bss dec filename > 20779489 6073834 3075176 29928499 vmlinux.volatile > 20736884 6073834 3075176 29885894 vmlinux.non-volatile > > i booted the resulting allyesconfig bzImage and everything seems to be > working fine. Find patch below. btw., this effect accounted for roughly half of the per-callsite win of the wait.h uninlining patch. That still leaves 18 bytes of per-callsite win - i'll send that patch next. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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