s390/mm: page_table_realloc returns failure
There is a possible race between setting has_pgste and reallocation of the page_table, change the order to fix this. Also page_table_alloc_pgste can fail, in that case we need to backpropagte this as -ENOMEM to the caller of page_table_realloc. Based on a patch by Christian Borntraeger <borntraeger@de.ibm.com>. Reviewed-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NDominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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