linux-kernel - [PATCH 0/2] Arithmetic ops for Instant/Delta

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Message-ID: <20250724185700.557505-1-lyude@redhat.com>
Date: Thu, 24 Jul 2025 14:54:05 -0400
From: Lyude Paul <lyude@...hat.com>
To: rust-for-linux@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Boqun Feng <boqun.feng@...il.com>,
	linux-kernel@...r.kernel.org,
	Andreas Hindborg <a.hindborg@...nel.org>,
	FUJITA Tomonori <fujita.tomonori@...il.com>
Cc: Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <lossin@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>
Subject: [PATCH 0/2] Arithmetic ops for Instant/Delta

When rebasing RVKMS against my hrtimer additions, which themselves were
rebased against Fujita's recent work for introducing Instant/Delta, I
needed to reintroduce the ability to perform some of the arithmetic that
rvkms uses for vblank emulation - so, this commit introduces such
arithmetic.

Example usage:
  https://gitlab.freedesktop.org/lyudess/linux/-/blob/rvkms-slim/drivers/gpu/drm/rvkms/crtc.rs?ref_type=heads#L167

Lyude Paul (2):
  rust: time: Implement Add<Delta>/Sub<Delta> for Instant
  rust: time: Implement basic arithmetic operations for Delta

 rust/kernel/time.rs | 115 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 114 insertions(+), 1 deletion(-)


base-commit: dff64b072708ffef23c117fa1ee1ea59eb417807
-- 
2.50.0