mm/ksm: remove old GCC 4.9+ check

The minimum supported version of GCC has been raised to GCC 5.1.

Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/ksm.c b/mm/ksm.c
index 025338128cd92415ba57ce989aa8b9ebba888bf7..a5716fdec1aac0ac9bf6f2305d5369887e671e39 100644 (file)
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -651,10 +651,8 @@ static void remove_node_from_stable_tree(struct stable_node *stable_node)
         * from &migrate_nodes. This will verify that future list.h changes
         * don't break STABLE_NODE_DUP_HEAD. Only recent gcc can handle it.
         */
-#if defined(GCC_VERSION) && GCC_VERSION >= 40903
        BUILD_BUG_ON(STABLE_NODE_DUP_HEAD <= &migrate_nodes);
        BUILD_BUG_ON(STABLE_NODE_DUP_HEAD >= &migrate_nodes + 1);
-#endif
 
        if (stable_node->head == &migrate_nodes)
                list_del(&stable_node->list);