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 gary@garyguo.net --- rust/kernel/kunit.rs | 10 ++-------- rust/kernel/print.rs | 4 ++-- rust/kernel/str.rs | 6 +++--- rust/kernel/uaccess.rs | 27 +++++++-------------------- 4 files changed, 14 insertions(+), 33 deletions(-)

diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 0ba77276ae7ef..766aeb1c6aea8 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -17,10 +17,7 @@ pub fn err(args: fmt::Arguments<'_>) { // are passing. #[cfg(CONFIG_PRINTK)] unsafe { - bindings::_printk( - b"\x013%pA\0".as_ptr() as _, - &args as *const _ as *const c_void, - ); + bindings::_printk(b"\x013%pA\0".as_ptr(), &args as *const _ as *const c_void); } }

@@ -33,10 +30,7 @@ pub fn info(args: fmt::Arguments<'_>) { // are passing. #[cfg(CONFIG_PRINTK)] unsafe { - bindings::_printk( - b"\x016%pA\0".as_ptr() as _, - &args as *const _ as *const c_void, - ); + bindings::_printk(b"\x016%pA\0".as_ptr(), &args as *const _ as *const c_void); } }

diff --git a/rust/kernel/print.rs b/rust/kernel/print.rs index 508b0221256c9..90ae4f2568910 100644 --- a/rust/kernel/print.rs +++ b/rust/kernel/print.rs @@ -104,7 +104,7 @@ pub unsafe fn call_printk( #[cfg(CONFIG_PRINTK)] unsafe { bindings::_printk( - format_string.as_ptr() as _, + format_string.as_ptr(), module_name.as_ptr(), &args as *const _ as *const c_void, ); @@ -125,7 +125,7 @@ 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 3980d37bd4b29..2d30bca079e37 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -190,7 +190,7 @@ pub unsafe fn from_char_ptr<'a>(ptr: *const crate::ffi::c_char) -> &'a Self { // 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) } @@ -249,7 +249,7 @@ pub unsafe fn from_bytes_with_nul_unchecked_mut(bytes: &mut [u8]) -> &mut 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. @@ -817,7 +817,7 @@ pub fn try_from_fmt(args: fmt::Arguments<'_>) -> Result<Self, Error> { // 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); } diff --git a/rust/kernel/uaccess.rs b/rust/kernel/uaccess.rs index c746a1f1bb5ad..eb72fbcf152a1 100644 --- a/rust/kernel/uaccess.rs +++ b/rust/kernel/uaccess.rs @@ -8,7 +8,7 @@ alloc::Flags, bindings, error::Result, - ffi::{c_ulong, c_void}, + ffi::c_void, prelude::*, types::{AsBytes, FromBytes}, }; @@ -227,13 +227,9 @@ pub fn read_raw(&mut self, out: &mut [MaybeUninit<u8>]) -> Result { if len > self.length { return Err(EFAULT); } - let Ok(len_ulong) = c_ulong::try_from(len) else { - return Err(EFAULT); - }; - // SAFETY: `out_ptr` points into a mutable slice of length `len_ulong`, so we may write + // SAFETY: `out_ptr` points into a mutable slice of length `len`, so we may write // that many bytes to it. - let res = - unsafe { bindings::copy_from_user(out_ptr, self.ptr as *const c_void, len_ulong) }; + let res = unsafe { bindings::copy_from_user(out_ptr, self.ptr as *const c_void, len) }; if res != 0 { return Err(EFAULT); } @@ -262,9 +258,6 @@ pub fn read<T: FromBytes>(&mut self) -> Result<T> { if len > self.length { return Err(EFAULT); } - let Ok(len_ulong) = c_ulong::try_from(len) else { - return Err(EFAULT); - }; let mut out: MaybeUninit<T> = MaybeUninit::uninit(); // SAFETY: The local variable `out` is valid for writing `size_of::<T>()` bytes. // @@ -275,7 +268,7 @@ pub fn read<T: FromBytes>(&mut self) -> Result<T> { bindings::_copy_from_user( out.as_mut_ptr().cast::<c_void>(), self.ptr as *const c_void, - len_ulong, + len, ) }; if res != 0 { @@ -338,12 +331,9 @@ pub fn write_slice(&mut self, data: &[u8]) -> Result { if len > self.length { return Err(EFAULT); } - let Ok(len_ulong) = c_ulong::try_from(len) else { - return Err(EFAULT); - }; - // SAFETY: `data_ptr` points into an immutable slice of length `len_ulong`, so we may read + // SAFETY: `data_ptr` points into an immutable slice of length `len`, so we may read // that many bytes from it. - let res = unsafe { bindings::copy_to_user(self.ptr as *mut c_void, data_ptr, len_ulong) }; + let res = unsafe { bindings::copy_to_user(self.ptr as *mut c_void, data_ptr, len) }; if res != 0 { return Err(EFAULT); } @@ -362,9 +352,6 @@ pub fn write<T: AsBytes>(&mut self, value: &T) -> Result { if len > self.length { return Err(EFAULT); } - let Ok(len_ulong) = c_ulong::try_from(len) else { - return Err(EFAULT); - }; // SAFETY: The reference points to a value of type `T`, so it is valid for reading // `size_of::<T>()` bytes. // @@ -375,7 +362,7 @@ pub fn write<T: AsBytes>(&mut self, value: &T) -> Result { bindings::_copy_to_user( self.ptr as *mut c_void, (value as *const T).cast::<c_void>(), - len_ulong, + len, ) }; if res != 0 {