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4a73b93ce4
This was there to be able to patch out locking instructions when running a SMP kernel build on a UP CPU. The times are long gone when single-CPU x86 machines were relevant so drop that machinery and simplify the code considerably. LOCK_PREFIX needs to stay for when one wants to do a UP build for whatever reason. That'll go away when CONFIG_SMP becomes unconditional. Kill a bunch of leftover, unused prototypes while at it. Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Link: https://lore.kernel.org/r/20260328081634.797552-1-rppt@kernel.org