Merge tag 'cmpxchg.2024.09.15a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

Pull byte cmpxchg updates from Paul McKenney:
 "ARC/sh/xtensa: Provide one-byte cmpxchg emulation

  This series provides emulated one-byte cmpxchg() support for ARM, sh,
  and xtensa using the cmpxchg_emu_u8() function that uses a four-byte
  cmpxchg() to emulate the one-byte variant.

  This covers all architectures"

* tag 'cmpxchg.2024.09.15a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
  xtensa: Emulate one-byte cmpxchg
  sh: Emulate one-byte cmpxchg
  ARC: Emulate one-byte cmpxchg