[PATCH v1] rust: error: add ERESTARTSYS error code

From: Alice Ryhl <aliceryhl@google.com>
To: Miguel Ojeda <ojeda@kernel.org>,
	Wedson Almeida Filho <wedsonaf@gmail.com>,
	Alex Gaynor <alex.gaynor@gmail.com>
Cc: "Boqun Feng" <boqun.feng@gmail.com>,
	"Gary Guo" <gary@garyguo.net>,
	"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
	"Benno Lossin" <benno.lossin@proton.me>,
	"Alice Ryhl" <aliceryhl@google.com>,
	rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
	patches@lists.linux.dev
Subject: [PATCH v1] rust: error: add ERESTARTSYS error code
Date: Wed,  3 May 2023 08:39:41 +0000	[thread overview]
Message-ID: <20230503083941.499090-1-aliceryhl@google.com> (raw)

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@google.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

