On Fri, Jun 12, 2026 at 6:40 AM Petr Pavlu <[email protected]> wrote: > > The linker script scripts/module.lds.S contains an unused DISCARD_EH_FRAME > definition introduced by commit 68c76ad4a957 ("arm64: unwind: add > asynchronous unwind tables to kernel and modules"). > > As shown in an earlier version of that patch [1], DISCARD_EH_FRAME was > meant to be used by SANITIZER_DISCARDS in the same file, as follows: > > -# define SANITIZER_DISCARDS *(.eh_frame) > +# define SANITIZER_DISCARDS DISCARD_EH_FRAME > > However, in the meantime, SANITIZER_DISCARDS was removed entirely from > module.lds.S by commit 89245600941e ("cfi: Switch to -fsanitize=kcfi"). > Eventually, the mentioned commit 68c76ad4a957 only added the new > DISCARD_EH_FRAME definition to this file without actually using it. > > The file include/asm-generic/vmlinux.lds.h contains a similar > DISCARD_EH_FRAME definition for vmlinux to discard .eh_frame sections that > may be present when CONFIG_GCOV_KERNEL, CONFIG_KASAN_GENERIC or > CONFIG_KCSAN is enabled. Testing these options on arm64 with LLVM 19.1 did > not show any unexpected .eh_frame sections in modules. > > Remove the unused DISCARD_EH_FRAME definition from scripts/module.lds.S. > > Link: > https://lore.kernel.org/linux-arm-kernel/[email protected]/ > [1] > Signed-off-by: Petr Pavlu <[email protected]>
Reviewed-by: Sami Tolvanen <[email protected]> Sami
