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-rw-r--r--arch/arm/mm/highmem.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c
index a34954d9df7..73cae57fa70 100644
--- a/arch/arm/mm/highmem.c
+++ b/arch/arm/mm/highmem.c
@@ -40,11 +40,16 @@ void *kmap_atomic(struct page *page, enum km_type type)
{
unsigned int idx;
unsigned long vaddr;
+ void *kmap;
pagefault_disable();
if (!PageHighMem(page))
return page_address(page);
+ kmap = kmap_high_get(page);
+ if (kmap)
+ return kmap;
+
idx = type + KM_TYPE_NR * smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
#ifdef CONFIG_DEBUG_HIGHMEM
@@ -80,6 +85,9 @@ void kunmap_atomic(void *kvaddr, enum km_type type)
#else
(void) idx; /* to kill a warning */
#endif
+ } else if (vaddr >= PKMAP_ADDR(0) && vaddr < PKMAP_ADDR(LAST_PKMAP)) {
+ /* this address was obtained through kmap_high_get() */
+ kunmap_high(pte_page(pkmap_page_table[PKMAP_NR(vaddr)]));
}
pagefault_enable();
}