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Add ARef::into_raw #1056

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Add ARef::into_raw #1056

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Kartik1397
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@Kartik1397 Kartik1397 commented Jan 15, 2024 •
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Closes: #1044

@Kartik1397
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Opened this PR for the initial review.

@Kartik1397 Kartik1397 marked this pull request as ready for review January 16, 2024 14:39
@y86-dev
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y86-dev commented Jan 24, 2024

Thanks for the patch!

I think it would be a good idea to mention that this function does not decrement the reference count.

For the example it would be very nice to not have to create an Empty type that implements AlwaysRefCounted. In the rust-dev branch you could use File .

@Kartik1397
rust: kernel: types: Add ARef::into_raw
10cef0c 
Add the function `into_raw` to `ARef<T>`. This method
can be used to turn an `ARef` into a raw pointer.

Signed-off-by: Kartik Prajapati <[email protected]>
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Thanks for checking the patch @y86-dev!

I think it would be a good idea to mention that this function does not decrement the reference count.

I've added this as a note in doc comment.

For the example it would be very nice to not have to create an Empty type that implements AlwaysRefCounted. In the rust-dev branch you could use File.

In rust-next only struct Task implements AlwaysRefCounted trait. Should I try to write an example using Task?
Also, do changes to rust-dev branch also go through the mailing list or github PR?

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ojeda commented Jan 25, 2024 •
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Everything for upstream goes through the mailing list -- please see https://rust-for-linux.com/contributing#the-kernel-development-process.

While File is not yet in rust-next, it may land relatively soon. So if you wish to use File, you could send the patch on top of the File patch series.

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While File is not yet in rust-next, it may land relatively soon. So if you wish to use File, you could send the patch on top of the File patch series.

To send a patch on top of another patch series, do I need to do anything apart from mentioning dependent patch in commit message as described in this doc?

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ojeda commented Jan 27, 2024

That would be enough, yeah (below the --- marker, i.e. outside the commit message itself). Ideally, you can put the URL to the patch series you used, to be unambiguous. For instance: https://lore.kernel.org/rust-for-linux/[email protected]/

Thanks!

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@ojeda this patch when upstream? or I can take to push it to the finish line?

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ojeda commented Mar 20, 2024

I don't think it was sent to the mailing list.

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ojeda commented Mar 20, 2024 •
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@Kartik1397 Do you plan to send this to the mailing list, or would you prefer that @vincenzopalazzo sends it on your behalf? (you would still be mentioned as author or co-author)

Thanks!

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@ojeda I wouldn't be able to work on this for at least two more weeks as I'm currently engaged in another project.
@vincenzopalazzo Feel free to take this patch and push it to the finish line. This would be great!

Thanks!

Darksonn added a commit to Darksonn/linux that referenced this pull request Aug 21, 2024
@Darksonn
# No title
06993f6 
Sending a v2 that is merged with [1]. I didn't realize that I was
duplicating work, sorry! I'll update the author information to list
Kartik as the primary author. I kept my function body so that it returns
NonNull to mirror the type used by `ARef::from_raw`.

This change was previously included in
https://lore.kernel.org/all/[email protected]/
but is being split out in its own commit at Danilo's suggestion.

To: Miguel Ojeda <[email protected]>
Cc: Alex Gaynor <[email protected]>
Cc: Wedson Almeida Filho <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Gary Guo <[email protected]>
Cc: Björn Roy Baron <[email protected]>
Cc: Benno Lossin <[email protected]>
Cc: Andreas Hindborg <[email protected]>
Cc: Andreas Hindborg <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: Rust-for-Linux#1056 [1]
Signed-off-by: Alice Ryhl <[email protected]>

---
Changes in v2:
- Add example from [1], and fix the imports in the example so it compiles.
- Update author information to reflect merge with [1].
- Link to v1: https://lore.kernel.org/r/[email protected]

--- b4-submit-tracking ---
# This section is used internally by b4 prep for tracking purposes.
{
  "series": {
    "revision": 2,
    "change-id": "20240801-aref-into-raw-e0518131442f",
    "prefixes": [],
    "history": {
      "v1": [
        "[email protected]"
      ]
    }
  }
}
Darksonn added a commit to Darksonn/linux that referenced this pull request Aug 21, 2024
@Darksonn
# No title
a3e8db1 
Sending a v2 that is merged with [1]. I didn't realize that I was
duplicating work, sorry! I'll update the author information to list
Kartik as the primary author. I kept my function body so that it returns
NonNull to mirror the type used by `ARef::from_raw`.

This change was previously included in
https://lore.kernel.org/all/[email protected]/
but is being split out in its own commit at Danilo's suggestion.

To: Miguel Ojeda <[email protected]>
Cc: Alex Gaynor <[email protected]>
Cc: Wedson Almeida Filho <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Gary Guo <[email protected]>
Cc: Björn Roy Baron <[email protected]>
Cc: Benno Lossin <[email protected]>
Cc: Andreas Hindborg <[email protected]>
Cc: Andreas Hindborg <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: Rust-for-Linux#1056 [1]
Signed-off-by: Alice Ryhl <[email protected]>

---
Changes in v3:
- EDITME: describe what is new in this series revision.
- EDITME: use bulletpoints and terse descriptions.
- Link to v2: https://lore.kernel.org/r/[email protected]

Changes in v2:
- Add example from [1], and fix the imports in the example so it compiles.
- Update author information to reflect merge with [1].
- Link to v1: https://lore.kernel.org/r/[email protected]

--- b4-submit-tracking ---
# This section is used internally by b4 prep for tracking purposes.
{
  "series": {
    "revision": 3,
    "change-id": "20240801-aref-into-raw-e0518131442f",
    "prefixes": [],
    "history": {
      "v1": [
        "[email protected]"
      ],
      "v2": [
        "[email protected]"
      ]
    }
  }
}
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Add ARef::into_raw
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@Kartik1397 @y86-dev @ojeda @vincenzopalazzo