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Commit 3ed6e129 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Handle a NULL vma in __update_tlb() for the fast-path. 



The TLB miss fast-path presently calls in to update_mmu_cache() to
set up the entry, and does so with a NULL vma. Check for vma validity
in the __update_tlb() ptrace checks.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 9cef7492

arch/sh/mm/tlb-pteaex.c

+1 −1
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte) 
	/*

	 * Handle debugger faulting in for debugee.

	 */

	if (current->active_mm != vma->vm_mm)

	if (vma && current->active_mm != vma->vm_mm)

		return;



	local_irq_save(flags);

arch/sh/mm/tlb-sh3.c

+1 −1
Original line number Diff line number Diff line
@@ -34,7 +34,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte) 
	/*

	 * Handle debugger faulting in for debugee.

	 */

	if (current->active_mm != vma->vm_mm)

	if (vma && current->active_mm != vma->vm_mm)

		return;



	local_irq_save(flags);

arch/sh/mm/tlb-sh4.c

+1 −1
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte) 
	/*

	 * Handle debugger faulting in for debugee.

	 */

	if (current->active_mm != vma->vm_mm)

	if (vma && current->active_mm != vma->vm_mm)

		return;



	local_irq_save(flags);