[S390] fix alloc_pgste check in init_new_context

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Processes started with kernel_execve from a kernel thread will have
current->mm==NULL. Reading current->mm->context.alloc_pgste will
read a more or less random bit from lowcore in this case. If the
bit turns out to be set the whole process tree started this way
will allocate page table extensions although they have no need
for it.

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

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Martin Schwidefsky 2011-05-10 17:13:43 +02:00 • committed by Martin Schwidefsky

parent 3d8dcb3c76

commit badb8bb983

1 changed files with 1 additions and 1 deletions

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arch/s390/include/asm/mmu_context.h

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