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[66.111.4.228]) by smtp.gmail.com with ESMTPSA id pi48-20020a05620a37b000b006e16dcf99c8sm13181950qkn.71.2023.02.01.15.22.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Feb 2023 15:22:53 -0800 (PST) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailauth.nyi.internal (Postfix) with ESMTP id D1FCB27C005A; Wed, 1 Feb 2023 18:22:52 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute5.internal (MEProxy); Wed, 01 Feb 2023 18:22:52 -0500 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrudefjedgudduucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepuehoqhhu nhcuhfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrihhlrdgtohhmqeenucggtffrrg htthgvrhhnpeehfedvtdekjedtleffkefgtdehueegfeffkeeggffhjefhudeikeejgeeh tedvfeenucffohhmrghinhepphhtrhdrrghsnecuvehluhhsthgvrhfuihiivgeptdenuc frrghrrghmpehmrghilhhfrhhomhepsghoqhhunhdomhgvshhmthhprghuthhhphgvrhhs ohhnrghlihhthidqieelvdeghedtieegqddujeejkeehheehvddqsghoqhhunhdrfhgvnh hgpeepghhmrghilhdrtghomhesfhhigihmvgdrnhgrmhgv X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 1 Feb 2023 18:22:52 -0500 (EST) From: Boqun Feng To: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Will Deacon , Peter Zijlstra , Mark Rutland , Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Vincenzo Palazzo Subject: [RFC 1/5] rust: sync: impl Display for {Unique,}Arc Date: Wed, 1 Feb 2023 15:22:40 -0800 Message-Id: <20230201232244.212908-2-boqun.feng@gmail.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230201232244.212908-1-boqun.feng@gmail.com> References: <20230201232244.212908-1-boqun.feng@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756673307563130008?= X-GMAIL-MSGID: =?utf-8?q?1756673307563130008?= This allows printing the inner data of `Arc` and its friends if the inner data implements `Display`. It's useful for logging and debugging purpose. Signed-off-by: Boqun Feng Reviewed-by: Gary Guo Reviewed-by: Björn Roy Baron Reviewed-by: Finn Behrens --- rust/kernel/sync/arc.rs | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs index 519a6ec43644..fc680a4a795c 100644 --- a/rust/kernel/sync/arc.rs +++ b/rust/kernel/sync/arc.rs @@ -22,6 +22,7 @@ use crate::{ }; use alloc::boxed::Box; use core::{ + fmt, marker::{PhantomData, Unsize}, mem::{ManuallyDrop, MaybeUninit}, ops::{Deref, DerefMut}, @@ -522,3 +523,15 @@ impl DerefMut for UniqueArc { unsafe { &mut self.inner.ptr.as_mut().data } } } + +impl fmt::Display for UniqueArc { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + fmt::Display::fmt(self.deref(), f) + } +} + +impl fmt::Display for Arc { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + fmt::Display::fmt(self.deref(), f) + } +}