From: Segher Boessenkool > Sent: 13 February 2024 19:13 > > On Tue, Feb 13, 2024 at 11:17:49AM +0100, Arnd Bergmann wrote: > > clang warns about explicitly casting between incompatible function > > pointers: > > > > drivers/tty/hvc/hvc_iucv.c:1100:23: error: cast from 'void (*)(const void *)' to 'void (*)(struct > device *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict] > > 1100 | priv->dev->release = (void (*)(struct device *)) kfree; > > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Such a cast of course is explicitly allowed by 6.3.2.3/8, only calling a > function using a non-compatible type is UB. This warning message is > quite misleading. Doubly so because of the -Werror, as always. But it will get called using the wrong type. And (is it) fine-ibt will reject the incorrect call. Has clang/gcc added an attribute to 'seed' the ibt hash yet? So that functions that are void (*)(void) can be separated? David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
