On 06/14/2016 10:01 AM, Lukasz Anaczkowski wrote: > v2 (Lukasz Anaczkowski): > () fixed compilation breakage ... By unconditionally defining the workaround code, even on kernels where there is no chance of ever hitting this bug. I think that's a pretty poor way to do it. Can we please stick this in one of the intel.c files, so it's only present on CPU_SUP_INTEL builds? Which reminds me... > --- a/arch/x86/include/asm/pgtable_64.h > +++ b/arch/x86/include/asm/pgtable_64.h > @@ -178,6 +178,12 @@ extern void cleanup_highmap(void); > extern void init_extra_mapping_uc(unsigned long phys, unsigned long size); > extern void init_extra_mapping_wb(unsigned long phys, unsigned long size); > > +#define ARCH_HAS_NEEDS_SWAP_PTL 1 > +static inline bool arch_needs_swap_ptl(void) > +{ > + return boot_cpu_has_bug(X86_BUG_PTE_LEAK); > +} Does this *REALLY* only affect 64-bit kernels? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>