Messages in this thread |  | | Date | Sun, 17 Jul 2022 15:56:15 -0500 | From | Segher Boessenkool <> | Subject | Re: mainline build failure of powerpc allmodconfig for prom_init_check |
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On Sun, Jul 17, 2022 at 01:29:07PM -0700, Linus Torvalds wrote: > On Sun, Jul 17, 2022 at 1:25 PM Sudip Mukherjee > <sudipm.mukherjee@gmail.com> wrote: > > > > And the generated assembly still has the memset for "struct prom_args". > > Strange. That smells like a compiler bug to me. > > But I can't read powerpc assembly code - it's been too many years, and > even back when I did read it I hated how the register "names" worked. > > Maybe it was never the args array, and it was about the other fields. > Not that that makes any sense either, but it makes more sense than the > compiler turning a series of volatile accesses into a memset.
Calling mem* on a volatile object (or a struct containing one) is not valid. I opened gcc.gnu.org/PR106335. Thanks for bringing this up!
Segher
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