Excerpts from Andreas Schwab's message of July 15, 2020 8:08 pm: > On Jul 15 2020, Nicholas Piggin wrote: > >> diff --git a/arch/powerpc/include/asm/exception-64e.h b/arch/powerpc/include/asm/exception-64e.h >> index 54a98ef7d7fe..071d7ccb830f 100644 >> --- a/arch/powerpc/include/asm/exception-64e.h >> +++ b/arch/powerpc/include/asm/exception-64e.h >> @@ -204,7 +204,11 @@ exc_##label##_book3e: >> LOAD_REG_ADDR(r3,interrupt_base_book3e);\ >> ori r3,r3,vector_offset@l; \ >> mtspr SPRN_IVOR##vector_number,r3; >> - >> +/* >> + * powerpc relies on return from interrupt/syscall being context synchronising >> + * (which rfi is) to support ARCH_HAS_MEMBARRIER_SYNC_CORE without additional >> + * additional synchronisation instructions. > > s/additonal// Will fix in a respin. Thanks, Nick
