powerpc/lib/code-patching: refactor patch_instruction()
patch_instruction() uses almost the same sequence as __patch_instruction() This patch refactor it so that patch_instruction() uses __patch_instruction() instead of duplicating code. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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