linux-kernel - [PATCH v1] rust: error: add ERESTARTSYS error code

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Date:   Wed,  3 May 2023 08:39:41 +0000
From:   Alice Ryhl <aliceryhl@...gle.com>
To:     Miguel Ojeda <ojeda@...nel.org>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Alex Gaynor <alex.gaynor@...il.com>
Cc:     Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        "Björn Roy Baron" <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        Alice Ryhl <aliceryhl@...gle.com>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev
Subject: [PATCH v1] rust: error: add ERESTARTSYS error code

This error code was probably excluded here originally because it never
actually reaches user programs when a syscall returns it. However, from
the perspective of a kernel driver, it is still a perfectly valid error
type, that the driver might need to return. E.g., this can be necessary
when a signal occurs during sleep.

Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
---
 rust/kernel/error.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs
index 5f4114b30b94..cbde1b2d29f4 100644
--- a/rust/kernel/error.rs
+++ b/rust/kernel/error.rs
@@ -58,6 +58,7 @@ pub mod code {
     declare_err!(EPIPE, "Broken pipe.");
     declare_err!(EDOM, "Math argument out of domain of func.");
     declare_err!(ERANGE, "Math result not representable.");
+    declare_err!(ERESTARTSYS, "Restart the system call.");
 }
 
 /// Generic integer kernel error.

base-commit: ea76e08f4d901a450619831a255e9e0a4c0ed162
-- 
2.40.1.495.gc816e09b53d-goog