sched/core: Add __might_sleep_precision()
Add __might_sleep_precision(), Rust friendly version of
__might_sleep(), which takes a pointer to a string with the length
instead of a null-terminated string.
Rust's core::panic::Location::file(), which gives the file name of a
caller, doesn't provide a null-terminated
string. __might_sleep_precision() uses a precision specifier in the
printk format, which specifies the length of a string; a string
doesn't need to be a null-terminated.
Modify __might_sleep() to call __might_sleep_precision() but the
impact should be negligible. When printing the error (sleeping
function called from invalid context), the precision string format is
used instead of the simple string format; the precision specifies the
the maximum length of the displayed string.
Note that Location::file() providing a null-terminated string for
better C interoperability is under discussion [1].
[1]: https://github.com/rust-lang/libs-team/issues/466
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20250410225623.152616-2-fujita.tomonori@gmail.com
2 files changed
