Messages in this thread | | | Date | Mon, 11 Jan 2010 15:24:12 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH] Allow linker to eliminate unused functions in lib/* |
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On Mon, Jan 11, 2010 at 10:17:08AM +1100, Dave Chinner wrote: > On Sat, Jan 09, 2010 at 05:51:56PM +0100, Andi Kleen wrote: > > > Sneaky. > > > > > > It's a bit sad to reduce the code cleanliness and maintainability in > > > this way, but 1k is 1k. > > > > Yes. I had actually hoped for more too. I think it might bring > > more with -ffunction-sections/--gc-sections, but I haven't tried that. > > > > An alternative might be also to give some more of those explicit Kconfig > > symbols -- then kernels with module loading enabled would benefit more > > too -- but I haven't investigated how many changes that would need. > > > > But even with that it's a reasonable improvement and putting the exports > > separately is not too bad. > > > > > The patch assumes a pre-existing lib-syms.c. Confused. > > > > Sorry, some day I'll learn how to operate quilt properly. > > > > Updated patch with all files included appended. > > Andi, how do you want to handle the overlap between this and the > list_sort() patch I sent? I'm going to need a list_sort() available > in the XFS tree well before the 2.6.34 merge window....
Shouldn't be difficult to merge, it's just a few lines. Someone will do that.
It wou;ld be better if you put it into a separate file like I suggested earlier though, then the list_sort() could be actually eliminated when not needed.
-Andi
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