Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...

[pandora-kernel.git] / mm / highmem.c

diff --git a/mm/highmem.c b/mm/highmem.c
index 51e1c19..be8f8d3 100644 (file)
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -99,6 +99,15 @@ static void flush_all_zero_pkmaps(void)
        flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
 }
 
+/* Flush all unused kmap mappings in order to remove stray
+   mappings. */
+void kmap_flush_unused(void)
+{
+       spin_lock(&kmap_lock);
+       flush_all_zero_pkmaps();
+       spin_unlock(&kmap_lock);
+}
+
 static inline unsigned long map_new_virtual(struct page *page)
 {
        unsigned long vaddr;