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FUJITA Tomonori
842aedc390
Add cpu_relax() helper in preparation for supporting read_poll_timeout(). Reviewed-by: Alice Ryhl <[email protected]> Reviewed-by: Andreas Hindborg <[email protected]> Reviewed-by: Daniel Almeida <[email protected]> Acked-by: Miguel Ojeda <[email protected]> Signed-off-by: FUJITA Tomonori <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Danilo Krummrich <[email protected]>
15 lines
393 B
Rust
15 lines
393 B
Rust
// SPDX-License-Identifier: GPL-2.0
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//! Processor related primitives.
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//!
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//! C header: [`include/linux/processor.h`](srctree/include/linux/processor.h)
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/// Lower CPU power consumption or yield to a hyperthreaded twin processor.
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///
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/// It also happens to serve as a compiler barrier.
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#[inline]
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pub fn cpu_relax() {
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// SAFETY: Always safe to call.
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unsafe { bindings::cpu_relax() }
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}
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