Messages in this thread | | | Date | Wed, 5 Apr 2023 20:00:15 +0200 | From | Greg KH <> | Subject | Re: [PATCH v2 01/13] rust: sync: introduce `LockClassKey` |
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On Wed, Apr 05, 2023 at 02:50:59PM -0300, Wedson Almeida Filho wrote: > From: Wedson Almeida Filho <walmeida@microsoft.com> > > It is a wrapper around C's `lock_class_key`, which is used by the > synchronisation primitives that are checked with lockdep. This is in > preparation for introducing Rust abstractions for these primitives. > > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Ingo Molnar <mingo@redhat.com> > Cc: Will Deacon <will@kernel.org> > Cc: Waiman Long <longman@redhat.com> > Co-developed-by: Boqun Feng <boqun.feng@gmail.com> > Signed-off-by: Boqun Feng <boqun.feng@gmail.com> > Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com> > --- > v1 -> v2: Fixed a typo in comment > > rust/kernel/sync.rs | 45 +++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 45 insertions(+) > > diff --git a/rust/kernel/sync.rs b/rust/kernel/sync.rs > index 33da23e3076d..84a4b560828c 100644 > --- a/rust/kernel/sync.rs > +++ b/rust/kernel/sync.rs > @@ -5,6 +5,51 @@ > //! This module contains the kernel APIs related to synchronisation that have been ported or > //! wrapped for usage by Rust code in the kernel. > > +use crate::types::Opaque; > + > mod arc; > > pub use arc::{Arc, ArcBorrow, UniqueArc}; > + > +/// Represents a lockdep class. It's a wrapper around C's `lock_class_key`. > +#[repr(transparent)] > +pub struct LockClassKey(Opaque<bindings::lock_class_key>);
Will this disappear into "nothing" if lockdep is disabled in the build?
If not, it should, if so, I couldn't see where that option was, sorry for the noise.
thanks,
greg k-h
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