• Jason A. Harmening's avatar
    Remove PCPU_INC · d22883d7
    Jason A. Harmening authored
    e4b8deb2 removed the last in-tree uses of PCPU_INC().  Its
    potential benefit is also practically nonexistent.  Non-x86
    platforms already implement it as PCPU_ADD(..., 1), and according
    to [0] there are no recent x86 processors for which the 'inc'
    instruction provides a performance benefit over the equivalent
    memory-operand form of the 'add' instruction.  The only remaining
    benefit of 'inc' is smaller instruction size, which in this case
    is inconsequential given the limited number of per-CPU data consumers.
    
    [0]: https://www.agner.org/optimize/instruction_tables.pdf
    
    Reviewed by:	kib
    Differential Revision:	https://reviews.freebsd.org/D29308
    d22883d7