misc: Replace div_round_up operation with div_ceil

As clippy of rust-toolchain version 1.83.0-beta.1 suggests, replace
manually implemented `div_round_up!` and the like with `div_ceil` from
std.

Signed-off-by: Ruoqing He <heruoqing@iscas.ac.cn>

fuzz/fuzz_targets/balloon.rs

@@ -120,7 +120,7 @@ impl VirtioInterrupt for NoopVirtioInterrupt {
 
 macro_rules! align {
     ($n:expr, $align:expr) => {{
-        (($n + $align - 1) / $align) * $align
+        $n.div_ceil($align) * $align
     }};
 }
 

fuzz/fuzz_targets/console.rs

@@ -21,7 +21,7 @@ type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
 
 macro_rules! align {
     ($n:expr, $align:expr) => {{
-        (($n + $align - 1) / $align) * $align
+        $n.div_ceil($align) * $align
     }};
 }
 

fuzz/fuzz_targets/iommu.rs

@@ -19,7 +19,7 @@ type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
 
 macro_rules! align {
     ($n:expr, $align:expr) => {{
-        (($n + $align - 1) / $align) * $align
+        $n.div_ceil($align) * $align
     }};
 }
 

fuzz/fuzz_targets/mem.rs

@@ -20,7 +20,7 @@ type GuestRegionMmap = vm_memory::GuestRegionMmap<AtomicBitmap>;
 
 macro_rules! align {
     ($n:expr, $align:expr) => {{
-        (($n + $align - 1) / $align) * $align
+        $n.div_ceil($align) * $align
     }};
 }
 

fuzz/fuzz_targets/net.rs

@@ -22,7 +22,7 @@ type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
 
 macro_rules! align {
     ($n:expr, $align:expr) => {{
-        (($n + $align - 1) / $align) * $align
+        $n.div_ceil($align) * $align
     }};
 }
 

fuzz/fuzz_targets/rng.rs

@@ -19,7 +19,7 @@ type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
 
 macro_rules! align {
     ($n:expr, $align:expr) => {{
-        (($n + $align - 1) / $align) * $align
+        $n.div_ceil($align) * $align
     }};
 }