On Tue, Feb 12, 2019 at 07:27:00PM -0500, Waiman Long wrote: > The content of kernel/locking/rwsem.h is now specific to rwsem-xadd only. > Rename it to rwsem-xadd.h to indicate that it is specific to rwsem-xadd > and include it only when CONFIG_RWSEM_XCHGADD_ALGORITHM is set. As a result, > the CONFIG_RWSEM_XCHGADD_ALGORITHM conditional compilation directives can > be removed. There is no functional change.
Since all of rwsem-xadd is now generic code; how about we delete the spinlock thing and keep everything rwsem ? We don't carry a special spinlock mutex implementation either. And arguably any arch that uses spinlock based atomics (afaict the only case where rwsem-spinlock makes any sense anyway) suck anyway.
