diff options
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/amd64/pmap.c | 33 |
1 files changed, 12 insertions, 21 deletions
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index 9e35ad7..68b94ba 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -1007,23 +1007,17 @@ pmap_new_thread(struct thread *td) /* * allocate object for the kstack */ - ksobj = td->td_kstack_obj; - if (ksobj == NULL) { - ksobj = vm_object_allocate(OBJT_DEFAULT, KSTACK_PAGES); - td->td_kstack_obj = ksobj; - } + ksobj = vm_object_allocate(OBJT_DEFAULT, KSTACK_PAGES); + td->td_kstack_obj = ksobj; #ifdef KSTACK_GUARD /* get a kernel virtual address for the kstack for this thread */ - ks = td->td_kstack; - if (ks == 0) { - ks = kmem_alloc_nofault(kernel_map, - (KSTACK_PAGES + 1) * PAGE_SIZE); - if (ks == 0) - panic("pmap_new_thread: kstack allocation failed"); - ks += PAGE_SIZE; - td->td_kstack = ks; - } + ks = kmem_alloc_nofault(kernel_map, + (KSTACK_PAGES + 1) * PAGE_SIZE); + if (ks == 0) + panic("pmap_new_thread: kstack allocation failed"); + ks += PAGE_SIZE; + td->td_kstack = ks; ptek = vtopte(ks - PAGE_SIZE); oldpte = *ptek; @@ -1038,13 +1032,10 @@ pmap_new_thread(struct thread *td) ptek++; #else /* get a kernel virtual address for the kstack for this thread */ - ks = td->td_kstack; - if (ks == 0) { - ks = kmem_alloc_nofault(kernel_map, KSTACK_PAGES * PAGE_SIZE); - if (ks == 0) - panic("pmap_new_thread: kstack allocation failed"); - td->td_kstack = ks; - } + ks = kmem_alloc_nofault(kernel_map, KSTACK_PAGES * PAGE_SIZE); + if (ks == 0) + panic("pmap_new_thread: kstack allocation failed"); + td->td_kstack = ks; ptek = vtopte(ks); #endif for (i = 0; i < KSTACK_PAGES; i++) { |
