Merge tag 'configfs-for-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/a.hindborg/linux

Pull configfs updates from Andreas Hindborg:

 - Switch the configfs rust bindings to use c string literals provided
   by the compiler, rather than a macro

 - A follow up on constifying `configfs_item_operations`, applying the
   change to the configfs sample

* tag 'configfs-for-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/a.hindborg/linux:
  samples: configfs: Constify struct configfs_item_operations and configfs_group_operations
  rust: configfs: replace `kernel::c_str!` with C-Strings

Author: torvalds

drivers/block/rnull/configfs.rs

@@ -3,7 +3,6 @@
 use super::{NullBlkDevice, THIS_MODULE};
 use kernel::{
     block::mq::gen_disk::{GenDisk, GenDiskBuilder},
-    c_str,
     configfs::{self, AttributeOperations},
     configfs_attrs,
     fmt::{self, Write as _},

rust/kernel/configfs.rs

@@ -21,7 +21,6 @@
 //!
 //! ```ignore
 //! use kernel::alloc::flags;
-//! use kernel::c_str;
 //! use kernel::configfs_attrs;
 //! use kernel::configfs;
 //! use kernel::new_mutex;
@@ -50,7 +49,7 @@
 //!
 //!         try_pin_init!(Self {
 //!             config <- configfs::Subsystem::new(
-//!                 c_str!("rust_configfs"), item_type, Configuration::new()
+//!                 c"rust_configfs", item_type, Configuration::new()
 //!             ),
 //!         })
 //!     }
@@ -66,7 +65,7 @@
 //! impl Configuration {
 //!     fn new() -> impl PinInit<Self, Error> {
 //!         try_pin_init!(Self {
-//!             message: c_str!("Hello World\n"),
+//!             message: c"Hello World\n",
 //!             bar <- new_mutex!((KBox::new([0; PAGE_SIZE], flags::GFP_KERNEL)?, 0)),
 //!         })
 //!     }
@@ -1000,7 +999,9 @@ macro_rules! configfs_attrs {
                     static [< $data:upper _ $name:upper _ATTR >]:
                         $crate::configfs::Attribute<$attr, $data, $data> =
                             unsafe {
-                                $crate::configfs::Attribute::new(c_str!(::core::stringify!($name)))
+                                $crate::configfs::Attribute::new(
+                                    $crate::c_str!(::core::stringify!($name)),
+                                )
                             };
                 )*
 

samples/configfs/configfs_sample.c

@@ -158,7 +158,7 @@ static void simple_child_release(struct config_item *item)
 	kfree(to_simple_child(item));
 }
 
-static struct configfs_item_operations simple_child_item_ops = {
+static const struct configfs_item_operations simple_child_item_ops = {
 	.release	= simple_child_release,
 };
 
@@ -215,15 +215,15 @@ static void simple_children_release(struct config_item *item)
 	kfree(to_simple_children(item));
 }
 
-static struct configfs_item_operations simple_children_item_ops = {
+static const struct configfs_item_operations simple_children_item_ops = {
 	.release	= simple_children_release,
 };
 
 /*
  * Note that, since no extra work is required on ->drop_item(),
  * no ->drop_item() is provided.
  */
-static struct configfs_group_operations simple_children_group_ops = {
+static const struct configfs_group_operations simple_children_group_ops = {
 	.make_item	= simple_children_make_item,
 };
 
@@ -292,7 +292,7 @@ static struct configfs_attribute *group_children_attrs[] = {
  * Note that, since no extra work is required on ->drop_item(),
  * no ->drop_item() is provided.
  */
-static struct configfs_group_operations group_children_group_ops = {
+static const struct configfs_group_operations group_children_group_ops = {
 	.make_group	= group_children_make_group,
 };
 

samples/rust/rust_configfs.rs

@@ -3,7 +3,6 @@
 //! Rust configfs sample.
 
 use kernel::alloc::flags;
-use kernel::c_str;
 use kernel::configfs;
 use kernel::configfs::configfs_attrs;
 use kernel::new_mutex;
@@ -35,7 +34,7 @@ struct Configuration {
 impl Configuration {
     fn new() -> impl PinInit<Self, Error> {
         try_pin_init!(Self {
-            message: c_str!("Hello World\n"),
+            message: c"Hello World\n",
             bar <- new_mutex!((KBox::new([0; PAGE_SIZE], flags::GFP_KERNEL)?, 0)),
         })
     }
@@ -61,7 +60,7 @@ impl kernel::InPlaceModule for RustConfigfs {
 
         try_pin_init!(Self {
             config <- configfs::Subsystem::new(
-                c_str!("rust_configfs"), item_type, Configuration::new()
+                c"rust_configfs", item_type, Configuration::new()
             ),
         })
     }