On 20.05.2024 19:25, Danilo Krummrich wrote:
Add a Rust abstraction for the kernel's devres (device resource
management) implementation.
The Devres type acts as a container to manage the lifetime and
accessibility of device bound resources. Therefore it registers a
devres callback and revokes access to the resource on invocation.
Users of the Devres abstraction can simply free the corresponding
resources in their Drop implementation, which is invoked when either the
Devres instance goes out of scope or the devres callback leads to the
resource being revoked, which implies a call to drop_in_place().
Co-developed-by: Philipp Stanner <pstanner@xxxxxxxxxx>
Signed-off-by: Philipp Stanner <pstanner@xxxxxxxxxx>
Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
---
rust/helpers.c | 5 ++
rust/kernel/devres.rs | 151 ++++++++++++++++++++++++++++++++++++++++++
rust/kernel/lib.rs | 1 +
3 files changed, 157 insertions(+)
create mode 100644 rust/kernel/devres.rs
diff --git a/rust/helpers.c b/rust/helpers.c
index 1d3e800140fc..34061eca05a0 100644
--- a/rust/helpers.c
+++ b/rust/helpers.c
@@ -173,6 +173,11 @@ void rust_helper_rcu_read_unlock(void)
EXPORT_SYMBOL_GPL(rust_helper_rcu_read_unlock);
/* end rcu */
+int rust_helper_devm_add_action(struct device *dev, void (*action)(void *), void *data)
+{
+ return devm_add_action(dev, action, data);
+}
+
/*
Is it intended to have no EXPORT_SYMBOL_GPL() for
rust_helper_devm_add_action() here?
Best regards
Dirk
