* Thomas Gleixner <t...@linutronix.de> wrote: > On Sun, 7 May 2017, Andy Lutomirski wrote: > > /* context.lock is held for us, so we don't need any locking. */ > > static void flush_ldt(void *current_mm) > > { > > + struct mm_struct *mm = current_mm; > > mm_context_t *pc; > > > > - if (current->active_mm != current_mm) > > + if (this_cpu_read(cpu_tlbstate.loaded_mm) != current_mm) > > While functional correct, this really should compare against 'mm'. > > > return; > > > > - pc = ¤t->active_mm->context; > > + pc = &mm->context;
So this appears to be the function: static void flush_ldt(void *current_mm) { struct mm_struct *mm = current_mm; mm_context_t *pc; if (this_cpu_read(cpu_tlbstate.loaded_mm) != current_mm) return; pc = &mm->context; set_ldt(pc->ldt->entries, pc->ldt->size); } why not rename 'current_mm' to 'mm' and remove the 'mm' local variable? Thanks, Ingo