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Howlett" , Vlastimil Babka , Andrew Morton , Christoph Lameter , David Rientjes , Roman Gushchin , Harry Yoo Cc: Daniel Gomez , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andreas Hindborg X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1538; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=PrcApbk7BCNSPsQwnef2I6IdaZ2i07Y2ln8fzlwV9sQ=; b=owEBbQKS/ZANAwAKAeG4Gj55KGN3AcsmYgBphljjynnLtfrU8Iiz9Gm5FPAFGgN+NLu89L3zu FUdyPDQUsCJAjMEAAEKAB0WIQQSwflHVr98KhXWwBLhuBo+eShjdwUCaYZY4wAKCRDhuBo+eShj d1WtD/0dSV1caS9hKFf19rq5n4cibJ7yErP+DuvjTNfhG+cx9BGtQf/Ivg9WhmB6dKF1/Ff/ZNE fD7LuuYM708jMZ/Ag3QLJ6bZhYFCBVFMXU7uc1O6puBKeYx/LAuPoocpO5LcFPP/bt1ZEw8WUF0 m7zzmtHnXb+6ujkjd2gl6hBhGgSgOGhvdJyYX3ULUUkVXe8vN5TpwXq/IlUw+Os6dWO0Z8QNI9L 49N/R7i9NuiZ19l2L7xKVsv9nEZmAAA6gJmAdAoeINuz0Q+e9PxyqMi9Ew1aBErPXVPOxMOchq7 4ohQLw/lItGvp12xabHAIbxlKUV9FMDxccovc/mki8TucfkGlQtmlMhLwGS+iQtmMw6havc9ndR Pf5qTpoqj69CNxpXyvsSUWI+xc49m7weMQ8a5zeIO/g2XlBsFrLQwnVtrhsHGKtxqg4Qo02NclV CmO6qLnLmsf4hNzCsYGRhK5mdwew7WujEbd5hlufx+YNqZ6a8kGCXRhAvh0c2OPAgDXd0RCHtnG Qy4kA65FWIqUx5woBVUWuCup53T3cNzSUyNmaXvwWMoXZyaDn7aJaQ+HLJyHHR3bZ7tqvodt018 KGZAdtO2i563HF4hHXqFw6msci9S/h4ojJZJCwvUaxYItpXWU1zcyOWq3rFcLZwLhGoZnQSJbel nenKo4yG1+Wh9Yw== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 X-Stat-Signature: d35twhh9nya9f6ioai37ehrtmx97f58c X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: EB4B940011 X-HE-Tag: 1770412296-219306 X-HE-Meta: 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 lbIji01I 5Z0LbwLQJYNPU1wjnM04bPBGodSzFNAPaJanke4QcPDaRNL6xs+XUeSpNNGZG7LQHvM3yfICF7Y4GKFC9kQiA/qwaBD4ByeHJI/DvkqKM7VPRXyLIPOuEZnjJQHaOld0sZHWv23MkNzUhIHEQrlS5xR8H0f62alnn9ktElPfElrOvrzlO/59rrVy/PPaoLiLUYQvVqWez/hJIvGGnWDAvo0Sd3QCJJLhVRkyRPCpzVlnPNAFxsKutry/wMyRcrghRtwLxC2bJazR+GS30YxrtLKOwbrFQBxpboPSQ0n1g7oHikNO6GtJFq+5xegusp/V2B+OwCsXEPeJhR0p6QaiwwbLGFyZ+1tA+cc8CZ6E6qlPApGg= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add a convenience method `contains_index` to check whether an element exists at a given index in the XArray. This method provides a more ergonomic API compared to calling `get` and checking for `Some`. Signed-off-by: Andreas Hindborg --- rust/kernel/xarray.rs | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/rust/kernel/xarray.rs b/rust/kernel/xarray.rs index d9762c6bef19c..ede48b5e1dba3 100644 --- a/rust/kernel/xarray.rs +++ b/rust/kernel/xarray.rs @@ -218,6 +218,27 @@ fn load(&self, index: usize, f: F) -> Option Some(f(ptr)) } + /// Checks if the XArray contains an element at the specified index. + /// + /// # Examples + /// + /// ``` + /// # use kernel::{alloc::{flags::GFP_KERNEL, kbox::KBox}, xarray::{AllocKind, XArray}}; + /// let xa = KBox::pin_init(XArray::new(AllocKind::Alloc), GFP_KERNEL)?; + /// + /// let mut guard = xa.lock(); + /// assert_eq!(guard.contains_index(42), false); + /// + /// guard.store(42, KBox::new(0u32, GFP_KERNEL)?, GFP_KERNEL)?; + /// + /// assert_eq!(guard.contains_index(42), true); + /// + /// # Ok::<(), kernel::error::Error>(()) + /// ``` + pub fn contains_index(&self, index: usize) -> bool { + self.get(index).is_some() + } + /// Provides a reference to the element at the given index. pub fn get(&self, index: usize) -> Option> { self.load(index, |ptr| { -- 2.51.2