Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4ee5f551 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Paul Mackerras
Browse files

powerpc: Fix ppc32 mm_struct CPU tracking in SMP 



The 32-bit hash code didn't need it so far so we don't update
mm->cpu_vm_mask on context switch.  This however will break when we
merge the RCU based page table freeing patch and other upcoming 32-bit
embedded SMP work, so this adds the update.

Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 1b98326b

arch/powerpc/include/asm/mmu_context.h

+3 −0
Original line number Diff line number Diff line
@@ -180,6 +180,9 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 


	tsk->thread.pgdir = next->pgd;



	if (!cpu_isset(smp_processor_id(), next->cpu_vm_mask))

		cpu_set(smp_processor_id(), next->cpu_vm_mask);



	/* No need to flush userspace segments if the mm doesnt change */

	if (prev == next)

		return;