Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'powerpc-6.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fix from Michael Ellerman:
- Disable IRQs when switching mm in exit_lazy_flush_tlb() called from
exit_mmap()
Thanks to Nicholas Piggin and Sachin Sant.
* tag 'powerpc-6.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s/radix: Fix exit lazy tlb mm switch with irqs enabled
+9
-1
+9
-1
arch/powerpc/mm/book3s64/radix_tlb.c
+9
-1
arch/powerpc/mm/book3s64/radix_tlb.c
···
795
795
goto out;
796
796
797
797
if (current->active_mm == mm) {
798
+
unsigned long flags;
799
+
798
800
WARN_ON_ONCE(current->mm != NULL);
799
-
/* Is a kernel thread and is using mm as the lazy tlb */
801
+
/*
802
+
* It is a kernel thread and is using mm as the lazy tlb, so
803
+
* switch it to init_mm. This is not always called from IPI
804
+
* (e.g., flush_type_needed), so must disable irqs.
805
+
*/
806
+
local_irq_save(flags);
800
807
mmgrab_lazy_tlb(&init_mm);
801
808
current->active_mm = &init_mm;
802
809
switch_mm_irqs_off(mm, &init_mm, current);
803
810
mmdrop_lazy_tlb(mm);
811
+
local_irq_restore(flags);
804
812
}
805
813
806
814
/*