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rust: miscdevice: fix write_iter safety docs

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The write_iter callback consumes data from the supplied iov_iter and
wraps it as an IovIterSource.

Its Safety docs required a valid iov_iter for writing, but the
implementation and the IovIterSource contract require one that is valid
for reading. Update the docs to match that direction.

Assisted-by: Codex:GPT-5
Signed-off-by: Yilin Chen <1479826151@qq.com>
Link: https://patch.msgid.link/tencent_8CD671E0F35223030143524D045F3BCAD506@qq.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yilin Chen
2026-07-07 16:10:30 +00:00
committed by Greg Kroah-Hartman
parent 0f7f34c67e
commit 4b17dfb3e2
1 changed files with 1 additions and 1 deletions
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2
rust/kernel/miscdevice.rs
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@@ -289,7 +289,7 @@ impl<T: MiscDevice> MiscdeviceVTable<T> {
/// # Safety
///
/// `kiocb` must be correspond to a valid file that is associated with a
/// `MiscDeviceRegistration<T>`. `iter` must be a valid `struct iov_iter` for writing.
/// `MiscDeviceRegistration<T>`. `iter` must be a valid `struct iov_iter` for reading.
unsafe extern "C" fn write_iter(
kiocb: *mut bindings::kiocb,
iter: *mut bindings::iov_iter,