summaryrefslogtreecommitdiffstats
path: root/kernel/livepatch
diff options
context:
space:
mode:
authorMiroslav Benes <mbenes@suse.cz>2017-05-26 14:45:21 +0200
committerJiri Kosina <jkosina@suse.cz>2017-05-27 00:27:37 +0200
commit5720acf4bfc142ba568d5b6782fceaf62ed15e0b (patch)
tree1710c0e1717f88eb51d7c6536e357de89f6b076c /kernel/livepatch
parent76f1948a79b26d5f57a5ee9941876b745c6baaea (diff)
downloadlinux-5720acf4bfc142ba568d5b6782fceaf62ed15e0b.tar.gz
linux-5720acf4bfc142ba568d5b6782fceaf62ed15e0b.tar.bz2
linux-5720acf4bfc142ba568d5b6782fceaf62ed15e0b.zip
livepatch: Make livepatch dependent on !TRIM_UNUSED_KSYMS
If TRIM_UNUSED_KSYMS is enabled, all unneeded exported symbols are made unexported. Two-pass build of the kernel is done to find out which symbols are needed based on a configuration. This effectively complicates things for out-of-tree modules. Livepatch exports functions to (un)register and enable/disable a live patch. The only in-tree module which uses these functions is a sample in samples/livepatch/. If the sample is disabled, the functions are trimmed and out-of-tree live patches cannot be built. Note that live patches are intended to be built out-of-tree. Suggested-by: Michal Marek <mmarek@suse.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Jessica Yu <jeyu@redhat.com> Signed-off-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'kernel/livepatch')
-rw-r--r--kernel/livepatch/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/livepatch/Kconfig b/kernel/livepatch/Kconfig
index 045022557936..ec4565122e65 100644
--- a/kernel/livepatch/Kconfig
+++ b/kernel/livepatch/Kconfig
@@ -10,6 +10,7 @@ config LIVEPATCH
depends on SYSFS
depends on KALLSYMS_ALL
depends on HAVE_LIVEPATCH
+ depends on !TRIM_UNUSED_KSYMS
help
Say Y here if you want to support kernel live patching.
This option has no runtime impact until a kernel "patch"