On 09/13/2019 11:53 AM, Christophe Leroy wrote: > Fix build failure on powerpc. > > Fix preemption imbalance. > > Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx> > --- > mm/arch_pgtable_test.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/mm/arch_pgtable_test.c b/mm/arch_pgtable_test.c > index 8b4a92756ad8..f2b3c9ec35fa 100644 > --- a/mm/arch_pgtable_test.c > +++ b/mm/arch_pgtable_test.c > @@ -24,6 +24,7 @@ > #include <linux/swap.h> > #include <linux/swapops.h> > #include <linux/sched/mm.h> > +#include <linux/highmem.h> This is okay. > #include <asm/pgalloc.h> > #include <asm/pgtable.h> > > @@ -400,6 +401,8 @@ static int __init arch_pgtable_tests_init(void) > p4d_clear_tests(p4dp); > pgd_clear_tests(mm, pgdp); > > + pte_unmap(ptep); > + Now the preemption imbalance via pte_alloc_map() path i.e pte_alloc_map() -> pte_offset_map() -> kmap_atomic() Is not this very much powerpc 32 specific or this will be applicable for all platform which uses kmap_XXX() to map high memory ?
