[S390] fix build breakage with CONFIG_AIO=n

next-20090925 randconfig build breaks on s390x, with CONFIG_AIO=n.

arch/s390/mm/pgtable.c: In function 's390_enable_sie':
arch/s390/mm/pgtable.c:282: error: 'struct mm_struct' has no member named 'ioctx_list'
arch/s390/mm/pgtable.c:298: error: 'struct mm_struct' has no member named 'ioctx_list'
make[1]: *** [arch/s390/mm/pgtable.o] Error 1

Reported-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index c60bfb3..2757c56 100644 (file)
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -279,7 +279,10 @@ int s390_enable_sie(void)
        /* lets check if we are allowed to replace the mm */
        task_lock(tsk);
        if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 ||
-           tsk->mm != tsk->active_mm || !hlist_empty(&tsk->mm->ioctx_list)) {
+#ifdef CONFIG_AIO
+           !hlist_empty(&tsk->mm->ioctx_list) ||
+#endif
+           tsk->mm != tsk->active_mm) {
                task_unlock(tsk);
                return -EINVAL;
        }
@@ -295,7 +298,10 @@ int s390_enable_sie(void)
        /* Now lets check again if something happened */
        task_lock(tsk);
        if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 ||
-           tsk->mm != tsk->active_mm || !hlist_empty(&tsk->mm->ioctx_list)) {
+#ifdef CONFIG_AIO
+           !hlist_empty(&tsk->mm->ioctx_list) ||
+#endif
+           tsk->mm != tsk->active_mm) {
                mmput(mm);
                task_unlock(tsk);
                return -EINVAL;