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Align len in madvise

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This commit is contained in:
Marsman1996
2024-08-19 17:01:16 +08:00
committed by Tate, Hongliang Tian
parent 22f9c072f3
commit fda0fa0512
1 changed files with 3 additions and 4 deletions
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7
kernel/aster-nix/src/syscall/madvise.rs
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@ -1,5 +1,7 @@
// SPDX-License-Identifier: MPL-2.0 // SPDX-License-Identifier: MPL-2.0
use align_ext::AlignExt;
use super::SyscallReturn; use super::SyscallReturn;
use crate::prelude::*; use crate::prelude::*;
@ -22,6 +24,7 @@ pub fn sys_madvise(
return Ok(SyscallReturn::Return(0)); return Ok(SyscallReturn::Return(0));
} }
let len = len.align_up(PAGE_SIZE);
match behavior { match behavior {
MadviseBehavior::MADV_NORMAL MadviseBehavior::MADV_NORMAL
| MadviseBehavior::MADV_SEQUENTIAL | MadviseBehavior::MADV_SEQUENTIAL
@ -41,10 +44,6 @@ pub fn sys_madvise(
} }
fn madv_free(start: Vaddr, len: usize, ctx: &Context) -> Result<()> { fn madv_free(start: Vaddr, len: usize, ctx: &Context) -> Result<()> {
if len % PAGE_SIZE != 0 {
return Ok(());
}
let root_vmar = ctx.process.root_vmar(); let root_vmar = ctx.process.root_vmar();
let advised_range = start..start + len; let advised_range = start..start + len;
let _ = root_vmar.destroy(advised_range); let _ = root_vmar.destroy(advised_range);