Commit fb944c9b authored Oct 17, 2012 by Ralf Baechle

MIPS: hugetlbfs: Fix hazard between tlb write and pagemask restoration.



On some CPU the write to pagemask might complete before the TLB write
instruction reads from the pagemask register.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 01422ff4

arch/mips/mm/tlb-r4k.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -320,6 +320,7 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte)
		tlb_write_random();
		else
		tlb_write_indexed();
		tlbw_use_hazard();
		write_c0_pagemask(PM_DEFAULT_MASK);
		} else
		#endif