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-rw-r--r--arch/s390/mm/mmap.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index c59a5efa58b..06bafec0027 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -101,12 +101,15 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
#else
-int s390_mmap_check(unsigned long addr, unsigned long len)
+int s390_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
{
int rc;
- if (!is_compat_task() &&
- len >= TASK_SIZE && TASK_SIZE < (1UL << 53)) {
+ if (is_compat_task() || (TASK_SIZE >= (1UL << 53)))
+ return 0;
+ if (!(flags & MAP_FIXED))
+ addr = 0;
+ if ((addr + len) >= TASK_SIZE) {
rc = crst_table_upgrade(current->mm, 1UL << 53);
if (rc)
return rc;