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init/Kconfig: add clarification for out-of-tree modules

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It doesn't trim just symbols that are totally unused in-tree - it trims
the symbols unused by any in-tree modules actually built.  If you've
done a 'make localmodconfig' and only build a hundred or so modules,
it's pretty likely that your out-of-tree module will come up lacking
something...

Hopefully this will save the next guy from a Homer Simpson "D'oh!"
moment.

Link: http://lkml.kernel.org/r/10177.1469787292@turing-police.cc.vt.edu
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Valdis Kletnieks 2016-08-02 14:07:27 -07:00 committed by Linus Torvalds
parent 27eb6622ab
commit f1cb637e75
1 changed files with 1 additions and 1 deletions
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init/Kconfig
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@ -2080,7 +2080,7 @@ config TRIM_UNUSED_KSYMS
(especially when using LTO) for optimizing the code and reducing
binary size. This might have some security advantages as well.
If unsure say N.
If unsure, or if you need to build out-of-tree modules, say N.
endif # MODULES