[S390] make page table upgrade work again
Martin Schwidefsky authored

After TASK_SIZE now gives the current size of the address space the
upgrade of a 64 bit process from 3 to 4 levels of page table  needs
to use the arch_mmap_check hook to catch large mmap lengths. The
get_unmapped_area* functions need to check for -ENOMEM from the
arch_get_unmapped_area*, upgrade the page table and retry.
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
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asm [S390] make page table upgrade work again