s390/mm: use VM_BUG_ON in crst_table_[upgrade|downgrade]

The BUG_ON in crst_table_[upgrade|downgrade] is a debugging aid,
replace it with VM_BUG_ON.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c
index c5b74dd61197998be7ee1e80a0a4de6d35a2fca7..05b5b1b0a8d99f62b10439f7744a95e085a80956 100644 (file)
--- a/arch/s390/mm/pgalloc.c
+++ b/arch/s390/mm/pgalloc.c
@@ -83,7 +83,7 @@ int crst_table_upgrade(struct mm_struct *mm, unsigned long end)
        int rc, notify;
 
        /* upgrade should only happen from 3 to 4, 3 to 5, or 4 to 5 levels */
-       BUG_ON(mm->context.asce_limit < _REGION2_SIZE);
+       VM_BUG_ON(mm->context.asce_limit < _REGION2_SIZE);
        if (end >= TASK_SIZE_MAX)
                return -ENOMEM;
        rc = 0;
@@ -124,7 +124,7 @@ void crst_table_downgrade(struct mm_struct *mm)
        pgd_t *pgd;
 
        /* downgrade should only happen from 3 to 2 levels (compat only) */
-       BUG_ON(mm->context.asce_limit != _REGION2_SIZE);
+       VM_BUG_ON(mm->context.asce_limit != _REGION2_SIZE);
 
        if (current->active_mm == mm) {
                clear_user_asce();