From 0675624829e9fb935a3d7ad1b46412e971d01d30 Mon Sep 17 00:00:00 2001 From: Gary Guo Date: Fri, 13 Sep 2024 22:29:25 +0100 Subject: [PATCH] rust: cleanup unnecessary casts With `long` mapped to `isize`, `size_t`/`__kernel_size_t` mapped to usize and `char` mapped to `u8`, many of the existing casts are no longer necessary. Signed-off-by: Gary Guo Reviewed-by: Alice Ryhl Link: https://lore.kernel.org/r/20240913213041.395655-6-gary@garyguo.net [ Moved `uaccess` changes to the previous commit, since they were irrefutable patterns that Rust >= 1.82.0 warns about. Removed a couple casts that now use `c""` literals. Rebased on top of `rust-next`. - Miguel ] Signed-off-by: Miguel Ojeda --- rust/kernel/print.rs | 4 ++-- rust/kernel/str.rs | 6 +++--- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/rust/kernel/print.rs b/rust/kernel/print.rs index a28077a7cb3011..b19ee490be58fd 100644 --- a/rust/kernel/print.rs +++ b/rust/kernel/print.rs @@ -107,7 +107,7 @@ pub unsafe fn call_printk( // SAFETY: TODO. unsafe { bindings::_printk( - format_string.as_ptr() as _, + format_string.as_ptr(), module_name.as_ptr(), &args as *const _ as *const c_void, ); @@ -128,7 +128,7 @@ pub fn call_printk_cont(args: fmt::Arguments<'_>) { #[cfg(CONFIG_PRINTK)] unsafe { bindings::_printk( - format_strings::CONT.as_ptr() as _, + format_strings::CONT.as_ptr(), &args as *const _ as *const c_void, ); } diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index d04c12a1426d1c..0f2765463dc840 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -189,7 +189,7 @@ impl CStr { // to a `NUL`-terminated C string. let len = unsafe { bindings::strlen(ptr) } + 1; // SAFETY: Lifetime guaranteed by the safety precondition. - let bytes = unsafe { core::slice::from_raw_parts(ptr as _, len as _) }; + let bytes = unsafe { core::slice::from_raw_parts(ptr as _, len) }; // SAFETY: As `len` is returned by `strlen`, `bytes` does not contain interior `NUL`. // As we have added 1 to `len`, the last byte is known to be `NUL`. unsafe { Self::from_bytes_with_nul_unchecked(bytes) } @@ -248,7 +248,7 @@ impl CStr { /// Returns a C pointer to the string. #[inline] pub const fn as_char_ptr(&self) -> *const crate::ffi::c_char { - self.0.as_ptr() as _ + self.0.as_ptr() } /// Convert the string to a byte slice without the trailing `NUL` byte. @@ -838,7 +838,7 @@ impl CString { // SAFETY: The buffer is valid for read because `f.bytes_written()` is bounded by `size` // (which the minimum buffer size) and is non-zero (we wrote at least the `NUL` terminator) // so `f.bytes_written() - 1` doesn't underflow. - let ptr = unsafe { bindings::memchr(buf.as_ptr().cast(), 0, (f.bytes_written() - 1) as _) }; + let ptr = unsafe { bindings::memchr(buf.as_ptr().cast(), 0, f.bytes_written() - 1) }; if !ptr.is_null() { return Err(EINVAL); }