diff options
Diffstat (limited to 'rust/kernel/cpu.rs')
| -rw-r--r-- | rust/kernel/cpu.rs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/rust/kernel/cpu.rs b/rust/kernel/cpu.rs index abc780d7a8ec..b75403b0eb56 100644 --- a/rust/kernel/cpu.rs +++ b/rust/kernel/cpu.rs @@ -102,6 +102,17 @@ impl CpuId { pub fn as_u32(&self) -> u32 { self.0 } + + /// Returns the ID of the CPU the code is currently running on. + /// + /// The returned value is considered unstable because it may change + /// unexpectedly due to preemption or CPU migration. It should only be + /// used when the context ensures that the task remains on the same CPU + /// or the users could use a stale (yet valid) CPU ID. + pub fn current() -> Self { + // SAFETY: raw_smp_processor_id() always returns a valid CPU ID. + unsafe { Self::from_u32_unchecked(bindings::raw_smp_processor_id()) } + } } impl From<CpuId> for u32 { |