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authorNicolas Pitre <nicolas.pitre@linaro.org>2016-01-26 21:51:05 -0500
committerNicolas Pitre <nicolas.pitre@linaro.org>2016-03-29 16:30:57 -0400
commitdbacb0ef670d057a2c52c0e1e642bab727f6b4cb (patch)
treef87ccee0bfc82076bc2ac4ede5c236e04a7222d7 /init
parentdd92478a15fa3bfd746ee08b4ef59401c1537804 (diff)
downloadlinux-stericsson-dbacb0ef670d057a2c52c0e1e642bab727f6b4cb.tar.gz
kconfig option for TRIM_UNUSED_KSYMS
The config option to enable it all. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig16
1 files changed, 16 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index e0d26162432e..29d74d3f8044 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -2012,6 +2012,22 @@ 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