rust/kernel/processor.rs

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 //! Processor related primitives.
   4 //!
   5 //! C header: [`include/linux/processor.h`](srctree/include/linux/processor.h)
   6
   7 /// Lower CPU power consumption or yield to a hyperthreaded twin processor.
   8 ///
   9 /// It also happens to serve as a compiler barrier.
  10 #[inline]
  11 pub fn cpu_relax() {
  12     // SAFETY: Always safe to call.
  13     unsafe { bindings::cpu_relax() }
  14 }