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block_util: add safety comments for impl ByteValued

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu 2021-11-17 13:26:24 +00:00 committed by Rob Bradford
parent 03862314eb
commit 6f49cb2860
1 changed files with 3 additions and 2 deletions
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5
block_util/src/lib.rs
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@ -409,8 +409,6 @@ pub struct VirtioBlockConfig {
pub write_zeroes_may_unmap: u8,
pub unused1: [u8; 3],
}
unsafe impl ByteValued for VirtioBlockConfig {}
#[derive(Copy, Clone, Debug, Default, Versionize)]
#[repr(C, packed)]
pub struct VirtioBlockGeometry {
@ -418,6 +416,9 @@ pub struct VirtioBlockGeometry {
pub heads: u8,
pub sectors: u8,
}
// SAFETY: these data structures only contain a series of integers
unsafe impl ByteValued for VirtioBlockConfig {}
unsafe impl ByteValued for VirtioBlockGeometry {}
/// Check if io_uring for block device can be used on the current system, as