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2bcd18e041
The ilog2() function can be used to generate a shift count, but it will generate the same count for a power of two as for one greater than a power of two. This results in shift counts that are larger than necessary for systems with a power-of-two number of CPUs because the CPUs are numbered from zero, so that the maximum CPU number is one less than that power of two. This commit therefore substitutes order_base_2(), which appears to have been designed for exactly this use case. Suggested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>