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block: qcow: Fix beta clippy issue

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warning: field `0` is never read
   --> block/src/qcow/vec_cache.rs:139:21
    |
139 |     struct NumCache(pub u64);
    |            -------- ^^^^^^^
    |            |
    |            field in this struct
    |
    = note: `#[warn(dead_code)]` on by default
help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
    |
139 |     struct NumCache(());
    |                     ~~

Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
(cherry picked from commit c19c73cb99904499daa0a47ca91ad70a3d4d78cb)
This commit is contained in:
Rob Bradford 2024-02-06 21:15:09 +00:00 committed by Bo Chen
parent 8e6bdcbf11
commit f8a5c149eb
1 changed files with 5 additions and 5 deletions
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10
block/src/qcow/vec_cache.rs
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@ -136,7 +136,7 @@ impl<T: Cacheable> CacheMap<T> {
mod tests {
use super::*;
struct NumCache(pub u64);
struct NumCache(());
impl Cacheable for NumCache {
fn dirty(&self) -> bool {
true
@ -148,28 +148,28 @@ mod tests {
let mut cache = CacheMap::<NumCache>::new(3);
let mut evicted = None;
cache
.insert(0, NumCache(5), |index, _| {
.insert(0, NumCache(()), |index, _| {
evicted = Some(index);
Ok(())
})
.unwrap();
assert_eq!(evicted, None);
cache
.insert(1, NumCache(6), |index, _| {
.insert(1, NumCache(()), |index, _| {
evicted = Some(index);
Ok(())
})
.unwrap();
assert_eq!(evicted, None);
cache
.insert(2, NumCache(7), |index, _| {
.insert(2, NumCache(()), |index, _| {
evicted = Some(index);
Ok(())
})
.unwrap();
assert_eq!(evicted, None);
cache
.insert(3, NumCache(8), |index, _| {
.insert(3, NumCache(()), |index, _| {
evicted = Some(index);
Ok(())
})