On Sat, Apr 13, 2013 at 11:06:14PM -0700, Joe Perches wrote:
> Hello Heiko.
>
> Commit ea81531d ("s390/uaccess: fix page table walk")
> added this code. It looks like it should have break;
> for each case.
Hi Joe,
no, the fallthrough is on purpose for each case statement.
> static unsigned long follow_table(struct mm_struct *mm,
> unsigned long address, int write)
> {
> unsigned long *table = (unsigned long *)__pa(mm->pgd);
>
> switch (mm->context.asce_bits & _ASCE_TYPE_MASK) {
> case _ASCE_TYPE_REGION1:
> table = table + ((address >> 53) & 0x7ff);
> if (unlikely(*table & _REGION_ENTRY_INV))
> return -0x39UL;
> table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
> case _ASCE_TYPE_REGION2:
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