On Tue, Sep 22, 2026 at 11:20:00AM +0530, Mukesh Kumar Chaurasiya (IBM) wrote: > Verify that the __bug_table entry emitted by ARCH_WARN_ASM has a correct > bug_addr displacement — i.e. the arch's trap label reference resolves to > the trap instruction — by calling find_bug() with the exact virtual address > of the trap, mirroring what the real trap handler does. > > To support all architectures, each arch that implements ARCH_WARN_ASM now > defines ARCH_WARN_ASM_TRAP_LABEL, a string constant naming the local label > at which the trap instruction is placed: > > x86 "1" (ud2 at label 1:) > powerpc "1" (twi at label 1:) > riscv "1" (ebreak at label 1:) > arm64 "14471" (brk placed at 14471: by __BUG_ENTRY_END) > s390 "0" (mc at label 0:)
I'm not a fan of exposing such a low-level implementation detail out of the architecture code, and I don't think we should expose this. What exactly are you trying to verify here, and why? Has there been some _specific_ issue on powerpc that caused you to look at this? Mark.
