vmalloc: call flush_cache_vunmap() from unmap_kernel_range()

Impact: proper vcache flush on unmap_kernel_range()

flush_cache_vunmap() should be called before pages are unmapped.  Add
a call to it in unmap_kernel_range().

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Nick Piggin <npiggin@suse.de>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: <stable@kernel.org>		[2.6.28.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 4dd2636d0b92..903cad46e796 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1012,6 +1012,8 @@ void __init vmalloc_init(void)
 void unmap_kernel_range(unsigned long addr, unsigned long size)
 {
         unsigned long end = addr + size;
+
+        flush_cache_vunmap(addr, end);
         vunmap_page_range(addr, end);
         flush_tlb_kernel_range(addr, end);
 }