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Groups > linux.kernel > #1330894
| From | Nicolas Pitre <nicolas.pitre@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 6/6] kconfig option for TRIM_UNUSED_KSYMS |
| Date | 2016-02-10 06:10 +0100 |
| Message-ID | <r0vcn-6bK-23@gated-at.bofh.it> (permalink) |
| References | <r0vcm-6bK-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
The config option to enable it all. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Rusty Russell <rusty@rustcorp.com.au> --- init/Kconfig | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/init/Kconfig b/init/Kconfig index 22320804fb..e6f666331b 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1990,6 +1990,22 @@ config MODULE_COMPRESS_XZ endchoice +config TRIM_UNUSED_KSYMS + bool "Trim unused exported kernel symbols" + depends on MODULES && !UNUSED_SYMBOLS + help + The kernel and some modules make many symbols available for + other modules to use via EXPORT_SYMBOL() and variants. Depending + on the set of modules being selected in your kernel configuration, + many of those exported symbols might never be used. + + This option allows for unused exported symbols to be dropped from + the build. In turn, this provides the compiler more opportunities + (especially when using LTO) for optimizing the code and reducing + binary size. This might have some security advantages as well. + + If unsure say N. + endif # MODULES config MODULES_TREE_LOOKUP -- 2.5.0
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[PATCH v2 0/6] Trim unused exported kernel symbols Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-10 06:10 +0100 [PATCH v2 3/6] fixdep: minor cleanup Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-10 06:10 +0100 [PATCH v2 1/6] kbuild: record needed exported symbols for modules Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-10 06:10 +0100 [PATCH v2 6/6] kconfig option for TRIM_UNUSED_KSYMS Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-10 06:10 +0100 [PATCH v2 2/6] allow for per-symbol configurable EXPORT_SYMBOL() Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-10 06:10 +0100 [PATCH v2 5/6] create/adjust generated/autoksyms.h Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-10 06:20 +0100 [PATCH v2 4/6] fixdep: add fine grained build dependencies for exported symbols Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-10 06:20 +0100
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