From: Heiko Carstens hca@linux.ibm.com
[ Upstream commit 9291ea091b29bb3e37c4b3416c7c1e49e472c7d5 ]
An mm has pgstes only after s390_enable_sie() has been called, while mm_alloc_pgste() may be always true (e.g. via sysctl setting).
Limit the calls to gmap_unlink() in pte_free_tlb() to those cases where there might be something to unlink.
Reviewed-by: Alexander Gordeev agordeev@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Vasily Gorbik gor@linux.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/s390/include/asm/tlb.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h index 72655fd2d867c..f20601995bb0e 100644 --- a/arch/s390/include/asm/tlb.h +++ b/arch/s390/include/asm/tlb.h @@ -84,7 +84,7 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, tlb->mm->context.flush_mm = 1; tlb->freed_tables = 1; tlb->cleared_pmds = 1; - if (mm_alloc_pgste(tlb->mm)) + if (mm_has_pgste(tlb->mm)) gmap_unlink(tlb->mm, (unsigned long *)pte, address); tlb_remove_ptdesc(tlb, virt_to_ptdesc(pte)); }