CVE-2024-42140

In the Linux kernel, the following vulnerability has been resolved:

riscv: kexec: Avoid deadlock in kexec crash path

If the kexec crash code is called in the interrupt context, the machinekexecmaskinterrupts() function will trigger a deadlock while trying to acquire the irqdesc spinlock and then deactivate irqchip in irqsetirqchipstate() function.

Unlike arm64, riscv only requires irqeoi handler to complete EOI and keeping irqsetirqchipstate() will only leave this possible deadlock without any use. So we simply remove it.