user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #465 from thomcc/cast-before-transmute

Browse source
This commit is contained in:
Amanieu d'Antras 2022-05-24 19:24:15 +02:00 • committed by GitHub
commit 092bbb67d4
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
library/compiler-builtins/src/arm_linux.rs
View file

@ -4,11 +4,11 @@ use core::mem;
// Kernel-provided user-mode helper functions:
// https://www.kernel.org/doc/Documentation/arm/kernel_user_helpers.txt
unsafe fn __kuser_cmpxchg(oldval: u32, newval: u32, ptr: *mut u32) -> bool {
let f: extern "C" fn(u32, u32, *mut u32) -> u32 = mem::transmute(0xffff0fc0u32);
let f: extern "C" fn(u32, u32, *mut u32) -> u32 = mem::transmute(0xffff0fc0usize as *const ());
f(oldval, newval, ptr) == 0
}
unsafe fn __kuser_memory_barrier() {
let f: extern "C" fn() = mem::transmute(0xffff0fa0u32);
let f: extern "C" fn() = mem::transmute(0xffff0fa0usize as *const ());
f();
}