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| author | Paul Mundt <lethal@linux-sh.org> | 2009-07-29 22:06:58 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-07-29 22:06:58 +0900 |
| commit | 3ed6e129390fb872c3b7e05a232e5d380fbdfb48 (patch) | |
| tree | c6cf9564b735f85d0a37f64e239767ce86e40b36 /arch/sh/mm | |
| parent | 9cef7492696a416663b4edb953a4eade8517ebeb (diff) | |
| download | linux-stable-3ed6e129390fb872c3b7e05a232e5d380fbdfb48.tar.gz linux-stable-3ed6e129390fb872c3b7e05a232e5d380fbdfb48.tar.bz2 linux-stable-3ed6e129390fb872c3b7e05a232e5d380fbdfb48.zip | |
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: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
| -rw-r--r-- | arch/sh/mm/tlb-pteaex.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-sh3.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-sh4.c | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/arch/sh/mm/tlb-pteaex.c b/arch/sh/mm/tlb-pteaex.c index 9aabd313cede..409b7c2b4b9d 100644 --- a/arch/sh/mm/tlb-pteaex.c +++ b/arch/sh/mm/tlb-pteaex.c @@ -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); diff --git a/arch/sh/mm/tlb-sh3.c b/arch/sh/mm/tlb-sh3.c index 425f1f23cf93..ace8e6d2f59d 100644 --- a/arch/sh/mm/tlb-sh3.c +++ b/arch/sh/mm/tlb-sh3.c @@ -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); diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c index 81199f1e5945..7d3c63e707a5 100644 --- a/arch/sh/mm/tlb-sh4.c +++ b/arch/sh/mm/tlb-sh4.c @@ -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); |