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authorJoe Lawrence <joe.lawrence@redhat.com>2017-08-31 16:37:41 -0400
committerJiri Kosina <jkosina@suse.cz>2017-09-14 23:06:12 +0200
commit439e7271dc2b63de379e37971dc2f64d71e24f8a (patch)
treec3dd63d08e743a63936c24949b456d4522003022 /firmware/advansys
parentdcba71086e0d1abf4f00cd381530b11d0db7fa1d (diff)
downloadlinux-439e7271dc2b63de379e37971dc2f64d71e24f8a.tar.bz2
livepatch: introduce shadow variable API
Add exported API for livepatch modules: klp_shadow_get() klp_shadow_alloc() klp_shadow_get_or_alloc() klp_shadow_free() klp_shadow_free_all() that implement "shadow" variables, which allow callers to associate new shadow fields to existing data structures. This is intended to be used by livepatch modules seeking to emulate additions to data structure definitions. See Documentation/livepatch/shadow-vars.txt for a summary of the new shadow variable API, including a few common use cases. See samples/livepatch/livepatch-shadow-* for example modules that demonstrate shadow variables. [jkosina@suse.cz: fix __klp_shadow_get_or_alloc() comment as spotted by Josh] Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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