mirror of
https://github.com/openembedded/meta-openembedded.git
synced 2025-12-14 14:25:53 +01:00
54 lines
2.0 KiB
Diff
54 lines
2.0 KiB
Diff
From a552c6891070bf400d4fe1f7c39c50b1a0b17748 Mon Sep 17 00:00:00 2001
|
|
From: Khem Raj <raj.khem@gmail.com>
|
|
Date: Tue, 22 Jul 2025 09:46:03 -0700
|
|
Subject: [PATCH] Use libc::SYS_futex_time64 on riscv32
|
|
|
|
On RISC-V 32-bit (riscv32), the SYS_futex system call is
|
|
often handled indirectly due to the use of a 64-bit time_t
|
|
type. Specifically, while SYS_futex is not directly defined,
|
|
a related syscall like SYS_futex_time64 can be used,
|
|
|
|
Upstream-Status: Backport [https://github.com/rust-random/getrandom/pull/698/commits/03d2c9f164099a714c3141c53221ccb68101c460]
|
|
Signed-off-by: Khem Raj <raj.khem@gmail.com>
|
|
---
|
|
src/backends/use_file.rs | 17 +++++++++++++++++
|
|
1 file changed, 17 insertions(+)
|
|
|
|
diff --git a/src/backends/use_file.rs b/src/backends/use_file.rs
|
|
index 7b48d43..baa0c66 100644
|
|
--- a/src/backends/use_file.rs
|
|
+++ b/src/backends/use_file.rs
|
|
@@ -158,7 +158,18 @@ mod sync {
|
|
pub(super) fn wait() {
|
|
let op = libc::FUTEX_WAIT | libc::FUTEX_PRIVATE_FLAG;
|
|
let timeout_ptr = core::ptr::null::<libc::timespec>();
|
|
+ #[cfg(not(target_arch = "riscv32"))]
|
|
let ret = unsafe { libc::syscall(libc::SYS_futex, &FD, op, FD_ONGOING_INIT, timeout_ptr) };
|
|
+ #[cfg(target_arch = "riscv32")]
|
|
+ let ret = unsafe {
|
|
+ libc::syscall(
|
|
+ libc::SYS_futex_time64,
|
|
+ &FD,
|
|
+ op,
|
|
+ FD_ONGOING_INIT,
|
|
+ timeout_ptr,
|
|
+ )
|
|
+ };
|
|
// FUTEX_WAIT should return either 0 or EAGAIN error
|
|
debug_assert!({
|
|
match ret {
|
|
@@ -172,7 +183,13 @@ mod sync {
|
|
/// Wake up all threads which wait for value of atomic `FD` to change.
|
|
pub(super) fn wake() {
|
|
let op = libc::FUTEX_WAKE | libc::FUTEX_PRIVATE_FLAG;
|
|
+
|
|
+ #[cfg(not(target_arch = "riscv32"))]
|
|
let ret = unsafe { libc::syscall(libc::SYS_futex, &FD, op, libc::INT_MAX) };
|
|
+
|
|
+ #[cfg(target_arch = "riscv32")]
|
|
+ let ret = unsafe { libc::syscall(libc::SYS_futex_time64, &FD, op, libc::INT_MAX) };
|
|
+
|
|
debug_assert!(ret >= 0);
|
|
}
|
|
|