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