[PATCH] powerpc/powermac: Use early_* IO variants in via_calibrate_decr

Benjamin Gray bgray at linux.ibm.com
Fri Jul 7 12:32:21 AEST 2023

On Thu, 2023-07-06 at 11:08 +1000, Benjamin Gray wrote:
> The issue is pre-existing, but is surfaced by commit 721255b9826b
> ("genirq: Use a maple tree for interrupt descriptor management").
> It's not clear to me why this causes it to surface.

>From the thread chain in [1], it looks like the maple tree
implementation just has different allocation behaviour, which follows a
pre-existing code path to kmem_cache_alloc_bulk(), which
unconditionally enables interrupts.

(thanks Jordan Niethe for finding this thread)

[1]: https://lore.kernel.org/all/87o7qdzfay.ffs@tglx/

More information about the Linuxppc-dev mailing list