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| author | David Gow <davidgow@google.com> | 2023-02-15 06:47:35 +0800 |
|---|---|---|
| committer | Miguel Ojeda <ojeda@kernel.org> | 2023-04-06 23:11:04 +0200 |
| commit | c682e4c37d2b8ba3bde1125cbbea4ee88824b4e2 (patch) | |
| tree | 8b5f155eb8e34da3486cb884726a2ea39be05f46 /rust | |
| parent | e5e86572e3f20222b5d308df9ae986c06f229321 (diff) | |
| download | lwn-c682e4c37d2b8ba3bde1125cbbea4ee88824b4e2.tar.gz lwn-c682e4c37d2b8ba3bde1125cbbea4ee88824b4e2.zip | |
rust: kernel: Mark rust_fmt_argument as extern "C"
The rust_fmt_argument function is called from printk() to handle the %pA
format specifier.
Since it's called from C, we should mark it extern "C" to make sure it's
ABI compatible.
Cc: stable@vger.kernel.org
Fixes: 247b365dc8dc ("rust: add `kernel` crate")
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
[Applied `rustfmt`]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'rust')
| -rw-r--r-- | rust/kernel/print.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/rust/kernel/print.rs b/rust/kernel/print.rs index 30103325696d..8009184bf6d7 100644 --- a/rust/kernel/print.rs +++ b/rust/kernel/print.rs @@ -18,7 +18,11 @@ use crate::bindings; // Called from `vsprintf` with format specifier `%pA`. #[no_mangle] -unsafe fn rust_fmt_argument(buf: *mut c_char, end: *mut c_char, ptr: *const c_void) -> *mut c_char { +unsafe extern "C" fn rust_fmt_argument( + buf: *mut c_char, + end: *mut c_char, + ptr: *const c_void, +) -> *mut c_char { use fmt::Write; // SAFETY: The C contract guarantees that `buf` is valid if it's less than `end`. let mut w = unsafe { RawFormatter::from_ptrs(buf.cast(), end.cast()) }; |