[PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS

From	Nicolas Pitre <nicolas.pitre@linaro.org>
Newsgroups	linux.kernel
Subject	[PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS
Date	2016-02-08 21:50 +0100
Message-ID	<r00UW-1XR-33@gated-at.bofh.it> (permalink)
References	<r00UV-1XR-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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The config option to enable it all.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
---
 init/Kconfig | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index 22320804fb..893c4979a9 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1990,6 +1990,22 @@ config MODULE_COMPRESS_XZ
 
 endchoice
 
+config TRIM_UNUSED_EXPSYMS
+	bool "Trim unused exported 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 6/6] kconfig option for TRIM_UNUSED_EXPSYMS Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-08 21:50 +0100
  Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS Rusty Russell <rusty@rustcorp.com.au> - 2016-02-09 05:00 +0100
    Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-09 05:40 +0100
    Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS Sam Ravnborg <sam@ravnborg.org> - 2016-02-09 12:50 +0100
  Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS Christoph Hellwig <hch@infradead.org> - 2016-02-09 14:30 +0100
    Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-02-09 14:40 +0100
    Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS Nicolas Pitre <nicolas.pitre@linaro.org> - 2016-02-09 18:10 +0100
      Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS Rusty Russell <rusty@rustcorp.com.au> - 2016-02-10 00:40 +0100

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