[PATCH 05/12] powerpc: Mark [h]ssr_valid accesses in check_return_regs_valid

Checks to see if the [H]SRR registers have been clobbered by (soft) NMI interrupts imply the possibility for a data race on the [h]srr_valid entries in the PACA. Annotate accesses to these fields with READ_ONCE, removing the need for the barrier. The diagnostic can use plain-access reads and write

Re: [PATCH 05/12] powerpc: Mark [h]ssr_valid accesses in check_return_regs_valid

On Mon May 8, 2023 at 12:01 PM AEST, Rohan McLure wrote: > Checks to see if the [H]SRR registers have been clobbered by (soft) > NMI interrupts imply the possibility for a data race on the > [h]srr_valid entries in the PACA. Annotate accesses to these fields with > READ_ONCE, removing the need for