Commit 01006074 authored Jan 29, 2009 by Peter Zijlstra Committed by Ingo Molnar Jan 29, 2009

x86: add might_sleep() to do_page_fault()



Impact: widen debug checks

VirtualBox calls do_page_fault() from an atomic context but runs into a
might_sleep() way pas this point, cure that.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent fb746d0e

arch/x86/mm/fault.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -888,6 +888,12 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
		return;
		}
		down_read(&mm->mmap_sem);
		} else {
		/*
		* The above down_read_trylock() might have succeeded in which
		* case we'll have missed the might_sleep() from down_read().
		*/
		might_sleep();
		}

		vma = find_vma(mm, address);