| From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| Date: Mon, 11 Mar 2013 21:37:27 +0100 |
| Subject: arm/highmem: Flush tlb on unmap |
| |
| The tlb should be flushed on unmap and thus make the mapping entry |
| invalid. This is only done in the non-debug case which does not look |
| right. |
| |
| Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| --- |
| arch/arm/mm/highmem.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/arch/arm/mm/highmem.c |
| +++ b/arch/arm/mm/highmem.c |
| @@ -112,10 +112,10 @@ void __kunmap_atomic(void *kvaddr) |
| __cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE); |
| #ifdef CONFIG_DEBUG_HIGHMEM |
| BUG_ON(vaddr != __fix_to_virt(idx)); |
| - set_fixmap_pte(idx, __pte(0)); |
| #else |
| (void) idx; /* to kill a warning */ |
| #endif |
| + set_fixmap_pte(idx, __pte(0)); |
| kmap_atomic_idx_pop(); |
| } else if (vaddr >= PKMAP_ADDR(0) && vaddr < PKMAP_ADDR(LAST_PKMAP)) { |
| /* this address was obtained through kmap_high_get() */ |
