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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-03-18 13:27:36 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-03-18 13:28:13 +0100
commitf481bfafd36e621d6cbc62d4b25f74811410aef7 (patch)
tree781f98037ec772f2b7d480d5642135f7c1ec8b89 /arch/s390/include/asm/mman.h
parent2887fc5aa60803b9d6d38c79248805f08d8b0e28 (diff)
[S390] make page table walking more robust
Make page table walking on s390 more robust. The current code requires that the pgd/pud/pmd/pte loop is only done for address ranges that are below the end address of the last vma of the address space. But this is not always true, e.g. the generic page table walker does not guarantee this. Change TASK_SIZE/TASK_SIZE_OF to reflect the current size of the address space. This makes the generic page table walker happy but it breaks the upgrade of a 3 level page table to a 4 level page table. To make the upgrade work again another fix is required. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/mman.h')
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