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linux-yocto/kernel/livepatch/Kconfig
Miroslav Benes 5720acf4bf 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>
2017-05-27 00:27:37 +02:00

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config HAVE_LIVEPATCH bool help Arch supports kernel live patching

config LIVEPATCH bool "Kernel Live Patching" depends on DYNAMIC_FTRACE_WITH_REGS depends on MODULES 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" module uses the interface provided by this option to register a patch, causing calls to patched functions to be redirected to new function code contained in the patch module.