linux-kernel - linux-next: build failure after merge of the rust tree

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Message-ID: <20250324215702.1515ba92@canb.auug.org.au>
Date: Mon, 24 Mar 2025 21:57:02 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Next
 Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the rust tree

Hi all,

After merging the rust tree, today's linux-next build (x86_64
allmodconfig) failed like this:

error[E0277]: `*mut MyStruct` cannot be sent between threads safely
  --> samples/rust/rust_dma.rs:47:22
   |
47 | impl pci::Driver for DmaSampleDriver {
   |                      ^^^^^^^^^^^^^^^ `*mut MyStruct` cannot be sent between threads safely
   |
   = help: within `DmaSampleDriver`, the trait `Send` is not implemented for `*mut MyStruct`, which is required by `DmaSampleDriver: Send`
note: required because it appears within the type `CoherentAllocation<MyStruct>`
  --> rust/kernel/dma.rs:132:12
note: required because it appears within the type `DmaSampleDriver`
  --> samples/rust/rust_dma.rs:9:8
   |
9  | struct DmaSampleDriver {
   |        ^^^^^^^^^^^^^^^
note: required by a bound in `kernel::pci::Driver`
  --> rust/kernel/pci.rs:225:1

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0277`.

I have no idea what caused this - it built in next-20250321, but that
no longer builds, so I have reset to the version of the rust tree in
next-20250320 (commit 4a47eec07be6).

-- 
Cheers,
Stephen Rothwell

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