linux-kernel - Re: [PATCH 0/2] configfs: Constify some fileds in struct config_item

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Message-ID: <87sef2fa5x.fsf@t14s.mail-host-address-is-not-set>
Date: Wed, 29 Oct 2025 08:18:34 +0100
From: Andreas Hindborg <a.hindborg@...nel.org>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>, leitao@...ian.org
Cc: linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
 Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: Re: [PATCH 0/2] configfs: Constify some fileds in struct
 config_item_type

"Christophe JAILLET" <christophe.jaillet@...adoo.fr> writes:

> These 2 patches constify ct_item_ops and ct_group_ops in struct
> config_item_type.
>
> When/if they are applied, I'll send some patchess in each subsystem to
> constify the corresponding structures.
>
> This 2 steps approach is IMHO easier way to make these changes.
> This avoids long series and cover-letter/first patches sent to many
> maintainers and lists.
>
> However, if you prefer things to be done in the same serie, I can do
> that as well.

Looks good to me. Please also include a patch to fix up the rust
bindings in the 2nd step:

diff --git a/rust/kernel/configfs.rs b/rust/kernel/configfs.rs
index 318a2f073d1c7..468c8c4170d5e 100644
--- a/rust/kernel/configfs.rs
+++ b/rust/kernel/configfs.rs
@@ -755,8 +755,8 @@ pub const fn new_with_child_ctor<const N: usize, Child>(
                 Self {
                     item_type: Opaque::new(bindings::config_item_type {
                         ct_owner: owner.as_ptr(),
-                        ct_group_ops: GroupOperationsVTable::<Data, Child>::vtable_ptr().cast_mut(),
-                        ct_item_ops: ItemOperationsVTable::<$tpe, Data>::vtable_ptr().cast_mut(),
+                        ct_group_ops: GroupOperationsVTable::<Data, Child>::vtable_ptr(),
+                        ct_item_ops: ItemOperationsVTable::<$tpe, Data>::vtable_ptr(),
                         ct_attrs: core::ptr::from_ref(attributes).cast_mut().cast(),
                         ct_bin_attrs: core::ptr::null_mut(),
                     }),
@@ -773,7 +773,7 @@ pub const fn new<const N: usize>(
                     item_type: Opaque::new(bindings::config_item_type {
                         ct_owner: owner.as_ptr(),
                         ct_group_ops: core::ptr::null_mut(),
-                        ct_item_ops: ItemOperationsVTable::<$tpe, Data>::vtable_ptr().cast_mut(),
+                        ct_item_ops: ItemOperationsVTable::<$tpe, Data>::vtable_ptr(),
                         ct_attrs: core::ptr::from_ref(attributes).cast_mut().cast(),
                         ct_bin_attrs: core::ptr::null_mut(),
                     }),



Best regards,
Andreas Hindborg