linux-kernel - [PATCH 6/7] drm/panic: allow verbose boolean for clarity

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Message-ID: <20241012075312.16342-6-witcher@wiredspace.de>
Date: Sat, 12 Oct 2024 09:52:49 +0200
From: Thomas Böhler <witcher@...edspace.de>
To: Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Jocelyn Falempe <jfalempe@...hat.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>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	rust-for-linux@...r.kernel.org,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Thomas Böhler <witcher@...edspace.de>
Subject: [PATCH 6/7] drm/panic: allow verbose boolean for clarity

Clippy complains about a non-minimal boolean expression with
`nonminimal_bool`:

    error: this boolean expression can be simplified
       --> drivers/gpu/drm/drm_panic_qr.rs:722:9
        |
    722 |         (x < 8 && y < 8) || (x < 8 && y >= end) || (x >= end && y < 8)
        |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
        = note: `-D clippy::nonminimal-bool` implied by `-D warnings`
        = help: to override `-D warnings` add `#[allow(clippy::nonminimal_bool)]`
    help: try
        |
    722 |         !(x >= 8 || y >= 8 && y < end) || (x >= end && y < 8)
        |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    722 |         (y >= end || y < 8) && x < 8 || (x >= end && y < 8)
        |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

While this can be useful in a lot of cases, it isn't here because the
line expresses clearly what the intention is. Simplifying the expression
means losing clarity, so opt-out of this lint for the offending line.

Reported-by: Miguel Ojeda <ojeda@...nel.org>
Closes: https://github.com/Rust-for-Linux/linux/issues/1123
Signed-off-by: Thomas Böhler <witcher@...edspace.de>
---
 drivers/gpu/drm/drm_panic_qr.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_panic_qr.rs b/drivers/gpu/drm/drm_panic_qr.rs
index 58c46f366f76..226107c02679 100644
--- a/drivers/gpu/drm/drm_panic_qr.rs
+++ b/drivers/gpu/drm/drm_panic_qr.rs
@@ -719,7 +719,8 @@ fn draw_finders(&mut self) {
 
     fn is_finder(&self, x: u8, y: u8) -> bool {
         let end = self.width - 8;
-        (x < 8 && y < 8) || (x < 8 && y >= end) || (x >= end && y < 8)
+        #[allow(clippy::nonminimal_bool)]
+        return (x < 8 && y < 8) || (x < 8 && y >= end) || (x >= end && y < 8);
     }
 
     // Alignment pattern: 5x5 squares in a grid.
-- 
2.46.2