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| author | Danilo Krummrich <dakr@kernel.org> | 2025-07-31 17:48:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-28 16:34:43 +0200 |
| commit | 9cd486e47ca8707183d517c3f86526988499b83d (patch) | |
| tree | 5b74c4bf1dfa39354f7d2061c3737048baefc493 /rust/kernel/error.rs | |
| parent | 3340149cebd9185bba088875bd9c56a0cd1e3992 (diff) | |
rust: drm: ensure kmalloc() compatible Layout
[ Upstream commit 22ab0641b939967f630d108e33a3582841ad6846 ]
drm::Device is allocated through __drm_dev_alloc() (which uses
kmalloc()) and the driver private data, <T as drm::Driver>::Data, is
initialized in-place.
Due to the order of fields in drm::Device
pub struct Device<T: drm::Driver> {
dev: Opaque<bindings::drm_device>,
data: T::Data,
}
even with an arbitrary large alignment requirement of T::Data it can't
happen that the size of Device is smaller than its alignment requirement.
However, let's not rely on this subtle circumstance and create a proper
kmalloc() compatible Layout.
Fixes: 1e4b8896c0f3 ("rust: drm: add device abstraction")
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20250731154919.4132-3-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'rust/kernel/error.rs')
0 files changed, 0 insertions, 0 deletions