Fix compilation on non-x86 with linux_latest. (#961)

* Fix compilation on non-x86 with linux_latest.

Fixes #958.

* Add some `cargo check` tests for linux_latest.

Author: sunfishcode

.github/workflows/main.yml

@@ -87,6 +87,7 @@ jobs:
     - run: cargo check --workspace --release -vv --all-targets
     - run: cargo check --workspace --release -vv --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --features=use-libc,all-apis --all-targets
+    - run: cargo check --workspace --release -vv --features=linux_latest,all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=aarch64-linux-android --all-targets
     - run: cargo check --workspace --release -vv --target=x86_64-unknown-linux-musl --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=x86_64-unknown-linux-musl --features=use-libc,all-apis --all-targets
@@ -106,7 +107,9 @@ jobs:
     - run: cargo check --workspace --release -vv --target=i686-unknown-linux-musl --features=use-libc,all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=wasm32-unknown-emscripten --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=riscv64gc-unknown-linux-gnu --features=all-apis --all-targets
+    - run: cargo check --workspace --release -vv --target=riscv64gc-unknown-linux-gnu --features=linux_latest,all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=aarch64-unknown-linux-gnu --features=all-apis --all-targets
+    - run: cargo check --workspace --release -vv --target=aarch64-unknown-linux-gnu --features=linux_latest,all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=aarch64-unknown-linux-musl --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=aarch64-unknown-linux-musl --features=use-libc,all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=powerpc64le-unknown-linux-gnu --features=all-apis --all-targets

src/backend/linux_raw/fs/syscalls.rs

@@ -8,7 +8,13 @@
 
 use crate::backend::c;
 use crate::backend::conv::fs::oflags_for_open_how;
-#[cfg(not(feature = "linux_4_11"))]
+#[cfg(any(
+    not(feature = "linux_4_11"),
+    target_arch = "aarch64",
+    target_arch = "riscv64",
+    target_arch = "mips",
+    target_arch = "mips32r6",
+))]
 use crate::backend::conv::zero;
 use crate::backend::conv::{
     by_ref, c_int, c_uint, dev_t, opt_mut, pass_usize, raw_fd, ret, ret_c_int, ret_c_uint,