ARC: [mm] Aliasing VIPT dcache support 2/4

[~andy/linux] / arch / arc / include / asm / tlb.h

diff --git a/arch/arc/include/asm/tlb.h b/arch/arc/include/asm/tlb.h
index fe91719866a57fed68e5ddb53228e7fec61279b1..85b6df839bd7b93b11465c066bdd063b32e68b77 100644 (file)
--- a/arch/arc/include/asm/tlb.h
+++ b/arch/arc/include/asm/tlb.h
@@ -30,13 +30,20 @@ do {                                                \
 /*
  * This pair is called at time of munmap/exit to flush cache and TLB entries
  * for mappings being torn down.
- * 1) cache-flush part -implemented via tlb_start_vma( ) can be NOP (for now)
- *    as we don't support aliasing configs in our VIPT D$.
+ * 1) cache-flush part -implemented via tlb_start_vma( ) for VIPT aliasing D$
  * 2) tlb-flush part - implemted via tlb_end_vma( ) flushes the TLB range
  *
  * Note, read http://lkml.org/lkml/2004/1/15/6
  */
+#ifndef CONFIG_ARC_CACHE_VIPT_ALIASING
 #define tlb_start_vma(tlb, vma)
+#else
+#define tlb_start_vma(tlb, vma)                                                \
+do {                                                                   \
+       if (!tlb->fullmm)                                               \
+               flush_cache_range(vma, vma->vm_start, vma->vm_end);     \
+} while(0)
+#endif
 
 #define tlb_end_vma(tlb, vma)                                          \
 do {                                                                   \