Merge tag 'gcc-minimum-version-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull compiler version requirement update from Arnd Bergmann:
 "Require gcc-8 and binutils-2.30

  x86 already uses gcc-8 as the minimum version, this changes all other
  architectures to the same version. gcc-8 is used is Debian 10 and Red
  Hat Enterprise Linux 8, both of which are still supported, and
  binutils 2.30 is the oldest corresponding version on those.

  Ubuntu Pro 18.04 and SUSE Linux Enterprise Server 15 both use gcc-7 as
  the system compiler but additionally include toolchains that remain
  supported.

  With the new minimum toolchain versions, a number of workarounds for
  older versions can be dropped, in particular on x86_64 and arm64.
  Importantly, the updated compiler version allows removing two of the
  five remaining gcc plugins, as support for sancov and structeak
  features is already included in modern compiler versions.

  I tried collecting the known changes that are possible based on the
  new toolchain version, but expect that more cleanups will be possible.

  Since this touches multiple architectures, I merged the patches
  through the asm-generic tree."

* tag 'gcc-minimum-version-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  Makefile.kcov: apply needed compiler option unconditionally in CFLAGS_KCOV
  Documentation: update binutils-2.30 version reference
  gcc-plugins: remove SANCOV gcc plugin
  Kbuild: remove structleak gcc plugin
  arm64: drop binutils version checks
  raid6: skip avx512 checks
  kbuild: require gcc-8 and binutils-2.30

1 files changed, 0 insertions, 134 deletions

diff --git a/scripts/gcc-plugins/sancov_plugin.c b/scripts/gcc-plugins/sancov_plugin.c
deleted file mode 100644
index b76cb9c42cec..000000000000
--- a/scripts/gcc-plugins/sancov_plugin.c
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- * Copyright 2011-2016 by Emese Revfy <re.emese@gmail.com>
- * Licensed under the GPL v2, or (at your option) v3
- *
- * Homepage:
- * https://github.com/ephox-gcc-plugins/sancov
- *
- * This plugin inserts a __sanitizer_cov_trace_pc() call at the start of basic blocks.
- * It supports all gcc versions with plugin support (from gcc-4.5 on).
- * It is based on the commit "Add fuzzing coverage support" by Dmitry Vyukov <dvyukov@google.com>.
- *
- * You can read about it more here:
- *  https://gcc.gnu.org/viewcvs/gcc?limit_changes=0&view=revision&revision=231296
- *  https://lwn.net/Articles/674854/
- *  https://github.com/google/syzkaller
- *  https://lwn.net/Articles/677764/
- *
- * Usage:
- * make run
- */
-
-#include "gcc-common.h"
-
-__visible int plugin_is_GPL_compatible;
-
-tree sancov_fndecl;
-
-static struct plugin_info sancov_plugin_info = {
-	.version	= PLUGIN_VERSION,
-	.help		= "sancov plugin\n",
-};
-
-static unsigned int sancov_execute(void)
-{
-	basic_block bb;
-
-	/* Remove this line when this plugin and kcov will be in the kernel.
-	if (!strcmp(DECL_NAME_POINTER(current_function_decl), DECL_NAME_POINTER(sancov_fndecl)))
-		return 0;
-	*/
-
-	FOR_EACH_BB_FN(bb, cfun) {
-		const_gimple stmt;
-		gcall *gcall;
-		gimple_stmt_iterator gsi = gsi_after_labels(bb);
-
-		if (gsi_end_p(gsi))
-			continue;
-
-		stmt = gsi_stmt(gsi);
-		gcall = as_a_gcall(gimple_build_call(sancov_fndecl, 0));
-		gimple_set_location(gcall, gimple_location(stmt));
-		gsi_insert_before(&gsi, gcall, GSI_SAME_STMT);
-	}
-	return 0;
-}
-
-#define PASS_NAME sancov
-
-#define NO_GATE
-#define TODO_FLAGS_FINISH TODO_dump_func | TODO_verify_stmts | TODO_update_ssa_no_phi | TODO_verify_flow
-
-#include "gcc-generate-gimple-pass.h"
-
-static void sancov_start_unit(void __unused *gcc_data, void __unused *user_data)
-{
-	tree leaf_attr, nothrow_attr;
-	tree BT_FN_VOID = build_function_type_list(void_type_node, NULL_TREE);
-
-	sancov_fndecl = build_fn_decl("__sanitizer_cov_trace_pc", BT_FN_VOID);
-
-	DECL_ASSEMBLER_NAME(sancov_fndecl);
-	TREE_PUBLIC(sancov_fndecl) = 1;
-	DECL_EXTERNAL(sancov_fndecl) = 1;
-	DECL_ARTIFICIAL(sancov_fndecl) = 1;
-	DECL_PRESERVE_P(sancov_fndecl) = 1;
-	DECL_UNINLINABLE(sancov_fndecl) = 1;
-	TREE_USED(sancov_fndecl) = 1;
-
-	nothrow_attr = tree_cons(get_identifier("nothrow"), NULL, NULL);
-	decl_attributes(&sancov_fndecl, nothrow_attr, 0);
-	gcc_assert(TREE_NOTHROW(sancov_fndecl));
-	leaf_attr = tree_cons(get_identifier("leaf"), NULL, NULL);
-	decl_attributes(&sancov_fndecl, leaf_attr, 0);
-}
-
-__visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version)
-{
-	int i;
-	const char * const plugin_name = plugin_info->base_name;
-	const int argc = plugin_info->argc;
-	const struct plugin_argument * const argv = plugin_info->argv;
-	bool enable = true;
-
-	static const struct ggc_root_tab gt_ggc_r_gt_sancov[] = {
-		{
-			.base = &sancov_fndecl,
-			.nelt = 1,
-			.stride = sizeof(sancov_fndecl),
-			.cb = &gt_ggc_mx_tree_node,
-			.pchw = &gt_pch_nx_tree_node
-		},
-		LAST_GGC_ROOT_TAB
-	};
-
-	/* BBs can be split afterwards?? */
-	PASS_INFO(sancov, "asan", 0, PASS_POS_INSERT_BEFORE);
-
-	if (!plugin_default_version_check(version, &gcc_version)) {
-		error(G_("incompatible gcc/plugin versions"));
-		return 1;
-	}
-
-	for (i = 0; i < argc; ++i) {
-		if (!strcmp(argv[i].key, "no-sancov")) {
-			enable = false;
-			continue;
-		}
-		error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);
-	}
-
-	register_callback(plugin_name, PLUGIN_INFO, NULL, &sancov_plugin_info);
-
-	if (!enable)
-		return 0;
-
-#if BUILDING_GCC_VERSION < 6000
-	register_callback(plugin_name, PLUGIN_START_UNIT, &sancov_start_unit, NULL);
-	register_callback(plugin_name, PLUGIN_REGISTER_GGC_ROOTS, NULL, (void *)&gt_ggc_r_gt_sancov);
-	register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &sancov_pass_info);
-#endif
-
-	return 0;
-}