livepatch: add sympos as disambiguator field to klp_reloc
authorChris J Arges <chris.j.arges@canonical.com>
Wed, 2 Dec 2015 02:40:55 +0000 (20:40 -0600)
committerJiri Kosina <jkosina@suse.cz>
Thu, 3 Dec 2015 22:01:27 +0000 (23:01 +0100)
commit064c89df6247cd829a7880cc8a87b7ed2cdfccd8
tree6122ff8685f8ec44fea809709293d9f27e1f4f0d
parentb2b018ef48675a9a524fa9791ea7d67fdac405f7
livepatch: add sympos as disambiguator field to klp_reloc

In cases of duplicate symbols, sympos will be used to disambiguate instead
of val. By default sympos will be 0, and patching will only succeed if
the symbol is unique. Specifying a positive value will ensure that
occurrence of the symbol in kallsyms for the patched object will be used
for patching if it is valid. For external relocations sympos is not
supported.

Remove klp_verify_callback, klp_verify_args and klp_verify_vmlinux_symbol
as they are no longer used.

From the klp_reloc structure remove val, as it can be refactored as a
local variable in klp_write_object_relocations.

Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
include/linux/livepatch.h
kernel/livepatch/core.c