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| author | Boqun Feng <boqun.feng@gmail.com> | 2025-10-21 23:42:37 -0400 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-10-22 15:21:51 +0200 |
| commit | 37d0472c8ac441af8bc10fc4959ad9d62dd5fa4c (patch) | |
| tree | 926feb9ceedafb7e81f2ead64111bf6ba5a023a0 | |
| parent | 795aab353d0650b2d04dc3aa2e22a51000cb2aaa (diff) | |
rust: debugfs: Implement Reader for Mutex<T> only when T is Unpin
Since we are going to make `Mutex<T>` structurally pin the data (i.e.
`T`), therefore `.lock()` function only returns a `Guard` that can
dereference a mutable reference to `T` if only `T` is `Unpin`, therefore
restrict the impl `Reader` block of `Mutex<T>` to that.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20251022034237.70431-1-boqun.feng@gmail.com
| -rw-r--r-- | rust/kernel/debugfs/traits.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/rust/kernel/debugfs/traits.rs b/rust/kernel/debugfs/traits.rs index ab009eb254b3..ba7ec5a900b8 100644 --- a/rust/kernel/debugfs/traits.rs +++ b/rust/kernel/debugfs/traits.rs @@ -50,7 +50,7 @@ pub trait Reader { fn read_from_slice(&self, reader: &mut UserSliceReader) -> Result; } -impl<T: FromStr> Reader for Mutex<T> { +impl<T: FromStr + Unpin> Reader for Mutex<T> { fn read_from_slice(&self, reader: &mut UserSliceReader) -> Result { let mut buf = [0u8; 128]; if reader.len() > buf.len() { |