6.12-stable review patch. If anyone has any objections, please let me know.
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From: Alice Ryhl aliceryhl@google.com
[ Upstream commit 901b3290bd4dc35e613d13abd03c129e754dd3dd ]
Without this change, the rest of this series will emit the following error message:
error[E0308]: `if` and `else` have incompatible types --> <linux>/rust/kernel/print.rs:22:22 | 21 | #[export] | --------- expected because of this 22 | unsafe extern "C" fn rust_fmt_argument( | ^^^^^^^^^^^^^^^^^ expected `u8`, found `i8` | = note: expected fn item `unsafe extern "C" fn(*mut u8, *mut u8, *mut c_void) -> *mut u8 {bindings::rust_fmt_argument}` found fn item `unsafe extern "C" fn(*mut i8, *mut i8, *const c_void) -> *mut i8 {print::rust_fmt_argument}`
The error may be different depending on the architecture.
To fix this, change the void pointer argument to use a const pointer, and change the imports to use crate::ffi instead of core::ffi for integer types.
Fixes: 787983da7718 ("vsprintf: add new `%pA` format specifier") Reviewed-by: Tamir Duberstein tamird@gmail.com Acked-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Alice Ryhl aliceryhl@google.com Acked-by: Petr Mladek pmladek@suse.com Link: https://lore.kernel.org/r/20250303-export-macro-v3-1-41fbad85a27f@google.com Signed-off-by: Miguel Ojeda ojeda@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- lib/vsprintf.c | 2 +- rust/kernel/print.rs | 7 +++---- 2 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index c5e2ec9303c5d..a69e71a1ca55e 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -2255,7 +2255,7 @@ int __init no_hash_pointers_enable(char *str) early_param("no_hash_pointers", no_hash_pointers_enable);
/* Used for Rust formatting ('%pA'). */ -char *rust_fmt_argument(char *buf, char *end, void *ptr); +char *rust_fmt_argument(char *buf, char *end, const void *ptr);
/* * Show a '%p' thing. A kernel extension is that the '%p' is followed diff --git a/rust/kernel/print.rs b/rust/kernel/print.rs index a28077a7cb301..e52cd64333bcc 100644 --- a/rust/kernel/print.rs +++ b/rust/kernel/print.rs @@ -6,12 +6,11 @@ //! //! Reference: https://docs.kernel.org/core-api/printk-basics.html
-use core::{ +use crate::{ ffi::{c_char, c_void}, - fmt, + str::RawFormatter, }; - -use crate::str::RawFormatter; +use core::fmt;
// Called from `vsprintf` with format specifier `%pA`. #[expect(clippy::missing_safety_doc)]