Updated to 5.6.15.b

Updated gcc patch to 20200527

6 files changed, 12 insertions, 550 deletions

diff --git a/0002-gcc-plugins-drop-support-for-GCC-47.patch b/0002-gcc-plugins-drop-support-for-GCC-47.patch
deleted file mode 100644
index 81698a8..0000000
--- a/0002-gcc-plugins-drop-support-for-GCC-47.patch
+++ /dev/null
@@ -1,277 +0,0 @@
-From dba68a9d4df76d49d32245e4236713a43fb321da Mon Sep 17 00:00:00 2001
-From: Masahiro Yamada <masahiroy@kernel.org>
-Date: Sun, 29 Mar 2020 20:08:32 +0900
-Subject: gcc-plugins: drop support for GCC <= 4.7
-
-Nobody was opposed to raising minimum GCC version to 4.8 [1]
-So, we will drop GCC <= 4.7 support sooner or later.
-
-We always use C++ compiler for building plugins for GCC >= 4.8.
-
-This commit drops the plugin support for GCC <= 4.7 a bit earlier,
-which allows us to dump lots of code.
-
-[1] https://lkml.org/lkml/2020/1/23/545
-
-Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
-Acked-by: Kees Cook <keescook@chromium.org>
----
- scripts/Kconfig.include      |  3 ---
- scripts/Makefile.build       |  2 +-
- scripts/Makefile.clean       |  1 -
- scripts/Makefile.host        | 23 +-----------------
- scripts/gcc-plugin.sh        | 55 ++++----------------------------------------
- scripts/gcc-plugins/Kconfig  | 12 ++--------
- scripts/gcc-plugins/Makefile | 21 +++++------------
- 7 files changed, 14 insertions(+), 103 deletions(-)
-
-diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
-index 496d11c92c97..033f6efd92d3 100644
---- a/scripts/Kconfig.include
-+++ b/scripts/Kconfig.include
-@@ -42,9 +42,6 @@ $(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found)
- # Fail if the linker is gold as it's not capable of linking the kernel proper
- $(error-if,$(success, $(LD) -v | grep -q gold), gold linker '$(LD)' not supported)
- 
--# gcc version including patch level
--gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC))
--
- # machine bit flags
- #  $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise.
- #  $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise.
-diff --git a/scripts/Makefile.build b/scripts/Makefile.build
-index a1730d42e5f3..eec789d7a63a 100644
---- a/scripts/Makefile.build
-+++ b/scripts/Makefile.build
-@@ -46,7 +46,7 @@ include $(kbuild-file)
- include scripts/Makefile.lib
- 
- # Do not include host rules unless needed
--ifneq ($(hostprogs)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
-+ifneq ($(hostprogs)$(hostcxxlibs-y)$(hostcxxlibs-m),)
- include scripts/Makefile.host
- endif
- 
-diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
-index 1e4206566a82..075f0cc2d8d7 100644
---- a/scripts/Makefile.clean
-+++ b/scripts/Makefile.clean
-@@ -30,7 +30,6 @@ subdir-ymn	:= $(addprefix $(obj)/,$(subdir-ymn))
- __clean-files	:= $(extra-y) $(extra-m) $(extra-)       \
- 		   $(always) $(always-y) $(always-m) $(always-) $(targets) $(clean-files)   \
- 		   $(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
--		   $(hostlibs-y) $(hostlibs-m) $(hostlibs-) \
- 		   $(hostcxxlibs-y) $(hostcxxlibs-m)
- 
- __clean-files   := $(filter-out $(no-clean-files), $(__clean-files))
-diff --git a/scripts/Makefile.host b/scripts/Makefile.host
-index 3b7121d43324..2045855d0b75 100644
---- a/scripts/Makefile.host
-+++ b/scripts/Makefile.host
-@@ -39,7 +39,6 @@ $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
- # They are linked as C++ code to the executable qconf
- 
- __hostprogs := $(sort $(hostprogs))
--host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
- host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
- 
- # C code
-@@ -63,7 +62,6 @@ host-cxxmulti	:= $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
- host-cxxobjs	:= $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
- 
- # Object (.o) files used by the shared libaries
--host-cshobjs	:= $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
- host-cxxshobjs	:= $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
- 
- host-csingle	:= $(addprefix $(obj)/,$(host-csingle))
-@@ -71,9 +69,7 @@ host-cmulti	:= $(addprefix $(obj)/,$(host-cmulti))
- host-cobjs	:= $(addprefix $(obj)/,$(host-cobjs))
- host-cxxmulti	:= $(addprefix $(obj)/,$(host-cxxmulti))
- host-cxxobjs	:= $(addprefix $(obj)/,$(host-cxxobjs))
--host-cshlib	:= $(addprefix $(obj)/,$(host-cshlib))
- host-cxxshlib	:= $(addprefix $(obj)/,$(host-cxxshlib))
--host-cshobjs	:= $(addprefix $(obj)/,$(host-cshobjs))
- host-cxxshobjs	:= $(addprefix $(obj)/,$(host-cxxshobjs))
- 
- #####
-@@ -140,13 +136,6 @@ quiet_cmd_host-cxxobjs	= HOSTCXX $@
- $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
- 	$(call if_changed_dep,host-cxxobjs)
- 
--# Compile .c file, create position independent .o file
--# host-cshobjs -> .o
--quiet_cmd_host-cshobjs	= HOSTCC  -fPIC $@
--      cmd_host-cshobjs	= $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
--$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
--	$(call if_changed_dep,host-cshobjs)
--
- # Compile .c file, create position independent .o file
- # Note that plugin capable gcc versions can be either C or C++ based
- # therefore plugin source files have to be compilable in both C and C++ mode.
-@@ -157,16 +146,6 @@ quiet_cmd_host-cxxshobjs	= HOSTCXX -fPIC $@
- $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
- 	$(call if_changed_dep,host-cxxshobjs)
- 
--# Link a shared library, based on position independent .o files
--# *.o -> .so shared library (host-cshlib)
--quiet_cmd_host-cshlib	= HOSTLLD -shared $@
--      cmd_host-cshlib	= $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
--			  $(addprefix $(obj)/, $($(target-stem)-objs)) \
--			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so)
--$(host-cshlib): FORCE
--	$(call if_changed,host-cshlib)
--$(call multi_depend, $(host-cshlib), .so, -objs)
--
- # Link a shared library, based on position independent .o files
- # *.o -> .so shared library (host-cxxshlib)
- quiet_cmd_host-cxxshlib	= HOSTLLD -shared $@
-@@ -178,4 +157,4 @@ $(host-cxxshlib): FORCE
- $(call multi_depend, $(host-cxxshlib), .so, -objs)
- 
- targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
--	   $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)
-+	   $(host-cxxmulti) $(host-cxxobjs) $(host-cxxshlib) $(host-cxxshobjs)
-diff --git a/scripts/gcc-plugin.sh b/scripts/gcc-plugin.sh
-index d3caefe53eab..b79fd0bea838 100755
---- a/scripts/gcc-plugin.sh
-+++ b/scripts/gcc-plugin.sh
-@@ -1,49 +1,14 @@
- #!/bin/sh
- # SPDX-License-Identifier: GPL-2.0
--srctree=$(dirname "$0")
--
--SHOW_ERROR=
--if [ "$1" = "--show-error" ] ; then
--	SHOW_ERROR=1
--	shift || true
--fi
--
--gccplugins_dir=$($3 -print-file-name=plugin)
--plugincc=$($1 -E -x c++ - -o /dev/null -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
--#include "gcc-common.h"
--#if BUILDING_GCC_VERSION >= 4008 || defined(ENABLE_BUILD_WITH_CXX)
--#warning $2 CXX
--#else
--#warning $1 CC
--#endif
--EOF
--)
- 
--if [ $? -ne 0 ]
--then
--	if [ -n "$SHOW_ERROR" ] ; then
--		echo "${plugincc}" >&2
--	fi
--	exit 1
--fi
-+set -e
- 
--case "$plugincc" in
--	*"$1 CC"*)
--		echo "$1"
--		exit 0
--		;;
--
--	*"$2 CXX"*)
--		# the c++ compiler needs another test, see below
--		;;
-+srctree=$(dirname "$0")
- 
--	*)
--		exit 1
--		;;
--esac
-+gccplugins_dir=$($* -print-file-name=plugin)
- 
- # we need a c++ compiler that supports the designated initializer GNU extension
--plugincc=$($2 -c -x c++ -std=gnu++98 - -fsyntax-only -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
-+$HOSTCC -c -x c++ -std=gnu++98 - -fsyntax-only -I $srctree/gcc-plugins -I $gccplugins_dir/include 2>/dev/null <<EOF
- #include "gcc-common.h"
- class test {
- public:
-@@ -52,15 +17,3 @@ public:
- 	.test = 1
- };
- EOF
--)
--
--if [ $? -eq 0 ]
--then
--	echo "$2"
--	exit 0
--fi
--
--if [ -n "$SHOW_ERROR" ] ; then
--	echo "${plugincc}" >&2
--fi
--exit 1
-diff --git a/scripts/gcc-plugins/Kconfig b/scripts/gcc-plugins/Kconfig
-index e3569543bdac..fd31ed5b435f 100644
---- a/scripts/gcc-plugins/Kconfig
-+++ b/scripts/gcc-plugins/Kconfig
-@@ -1,13 +1,4 @@
- # SPDX-License-Identifier: GPL-2.0-only
--preferred-plugin-hostcc := $(if-success,[ $(gcc-version) -ge 40800 ],$(HOSTCXX),$(HOSTCC))
--
--config PLUGIN_HOSTCC
--	string
--	default "$(shell,$(srctree)/scripts/gcc-plugin.sh "$(preferred-plugin-hostcc)" "$(HOSTCXX)" "$(CC)")" if CC_IS_GCC
--	help
--	  Host compiler used to build GCC plugins.  This can be $(HOSTCXX),
--	  $(HOSTCC), or a null string if GCC plugin is unsupported.
--
- config HAVE_GCC_PLUGINS
- 	bool
- 	help
-@@ -17,7 +8,8 @@ config HAVE_GCC_PLUGINS
- menuconfig GCC_PLUGINS
- 	bool "GCC plugins"
- 	depends on HAVE_GCC_PLUGINS
--	depends on PLUGIN_HOSTCC != ""
-+	depends on CC_IS_GCC && GCC_VERSION >= 40800
-+	depends on $(success,$(srctree)/scripts/gcc-plugin.sh $(CC))
- 	default y
- 	help
- 	  GCC plugins are loadable modules that provide extra features to the
-diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
-index f2ee8bd7abc6..f22858b2c3d6 100644
---- a/scripts/gcc-plugins/Makefile
-+++ b/scripts/gcc-plugins/Makefile
-@@ -1,18 +1,9 @@
- # SPDX-License-Identifier: GPL-2.0
--PLUGINCC := $(CONFIG_PLUGIN_HOSTCC:"%"=%)
- GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin)
- 
--ifeq ($(PLUGINCC),$(HOSTCC))
--  HOSTLIBS := hostlibs
--  HOST_EXTRACFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu99 -ggdb
--  export HOST_EXTRACFLAGS
--else
--  HOSTLIBS := hostcxxlibs
--  HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
--  HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
--  HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable
--  export HOST_EXTRACXXFLAGS
--endif
-+HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
-+HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
-+HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat
- 
- $(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h
- quiet_cmd_create_randomize_layout_seed = GENSEED $@
-@@ -22,9 +13,9 @@ $(objtree)/$(obj)/randomize_layout_seed.h: FORCE
- 	$(call if_changed,create_randomize_layout_seed)
- targets = randomize_layout_seed.h randomize_layout_hash.h
- 
--$(HOSTLIBS)-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p)))
--always-y := $($(HOSTLIBS)-y)
-+hostcxxlibs-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p)))
-+always-y := $(hostcxxlibs-y)
- 
--$(foreach p,$($(HOSTLIBS)-y:%.so=%),$(eval $(p)-objs := $(p).o))
-+$(foreach p,$(hostcxxlibs-y:%.so=%),$(eval $(p)-objs := $(p).o))
- 
- clean-files += *.so
--- 
-cgit v1.2.3-1-gf6bb5
-
diff --git a/0003-gcc-common.h-Update-for-GCC-10.patch b/0003-gcc-common.h-Update-for-GCC-10.patch
deleted file mode 100644
index ec4fc15..0000000
--- a/0003-gcc-common.h-Update-for-GCC-10.patch
+++ /dev/null
@@ -1,86 +0,0 @@
-From 41e53fdbbf5121960fd44427c2ae7536d8fdd701 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Pierret=20=28fepitre=29?=
- <frederic.pierret@qubes-os.org>
-Date: Tue, 7 Apr 2020 13:32:59 +0200
-Subject: gcc-common.h: Update for GCC 10
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Remove "params.h" include, which has been dropped in GCC 10.
-
-Remove is_a_helper() macro, which is now defined in gimple.h, as seen
-when running './scripts/gcc-plugin.sh g++ g++ gcc':
-
-In file included from <stdin>:1:
-./gcc-plugins/gcc-common.h:852:13: error: redefinition of ‘static bool is_a_helper<T>::test(U*) [with U = const gimple; T = const ggoto*]’
-  852 | inline bool is_a_helper<const ggoto *>::test(const_gimple gs)
-      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~
-In file included from ./gcc-plugins/gcc-common.h:125,
-                 from <stdin>:1:
-/usr/lib/gcc/x86_64-redhat-linux/10/plugin/include/gimple.h:1037:1: note: ‘static bool is_a_helper<T>::test(U*) [with U = const gimple; T = const ggoto*]’ previously declared here
- 1037 | is_a_helper <const ggoto *>::test (const gimple *gs)
-      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Add -Wno-format-diag to scripts/gcc-plugins/Makefile to avoid
-meaningless warnings from error() formats used by plugins:
-
-scripts/gcc-plugins/structleak_plugin.c: In function ‘int plugin_init(plugin_name_args*, plugin_gcc_version*)’:
-scripts/gcc-plugins/structleak_plugin.c:253:12: warning: unquoted sequence of 2 consecutive punctuation characters ‘'-’ in format [-Wformat-diag]
-  253 |   error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);
-      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Signed-off-by: Frédéric Pierret (fepitre) <frederic.pierret@qubes-os.org>
-Link: https://lore.kernel.org/r/20200407113259.270172-1-frederic.pierret@qubes-os.org
-[kees: include -Wno-format-diag for plugin builds]
-Signed-off-by: Kees Cook <keescook@chromium.org>
----
- scripts/gcc-plugins/Makefile     | 1 +
- scripts/gcc-plugins/gcc-common.h | 4 ++++
- 2 files changed, 5 insertions(+)
-
-diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
-index f22858b2c3d6..80f354289eeb 100644
---- a/scripts/gcc-plugins/Makefile
-+++ b/scripts/gcc-plugins/Makefile
-@@ -4,6 +4,7 @@ GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin)
- HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
- HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
- HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat
-+HOST_EXTRACXXFLAGS += -Wno-format-diag
- 
- $(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h
- quiet_cmd_create_randomize_layout_seed = GENSEED $@
-diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h
-index 17f06079a712..9ad76b7f3f10 100644
---- a/scripts/gcc-plugins/gcc-common.h
-+++ b/scripts/gcc-plugins/gcc-common.h
-@@ -35,7 +35,9 @@
- #include "ggc.h"
- #include "timevar.h"
- 
-+#if BUILDING_GCC_VERSION < 10000
- #include "params.h"
-+#endif
- 
- #if BUILDING_GCC_VERSION <= 4009
- #include "pointer-set.h"
-@@ -847,6 +849,7 @@ static inline gimple gimple_build_assign_with_ops(enum tree_code subcode, tree l
- 	return gimple_build_assign(lhs, subcode, op1, op2 PASS_MEM_STAT);
- }
- 
-+#if BUILDING_GCC_VERSION < 10000
- template <>
- template <>
- inline bool is_a_helper<const ggoto *>::test(const_gimple gs)
-@@ -860,6 +863,7 @@ inline bool is_a_helper<const greturn *>::test(const_gimple gs)
- {
- 	return gs->code == GIMPLE_RETURN;
- }
-+#endif
- 
- static inline gasm *as_a_gasm(gimple stmt)
- {
--- 
-cgit v1.2.3-1-gf6bb5
-
diff --git a/0004-Makefile-disallow-data-races-on-gcc-10-as-well.patch b/0004-Makefile-disallow-data-races-on-gcc-10-as-well.patch
deleted file mode 100644
index 26537e4..0000000
--- a/0004-Makefile-disallow-data-races-on-gcc-10-as-well.patch
+++ /dev/null
@@ -1,32 +0,0 @@
-From af805f5f1d2e61dd2cf907d9635f0abc66fe1197 Mon Sep 17 00:00:00 2001
-From: Sergei Trofimovich <slyfox@gentoo.org>
-Date: Tue, 17 Mar 2020 00:07:18 +0000
-Subject: Makefile: disallow data races on gcc-10 as well
-
-gcc-10 will rename --param=allow-store-data-races=0
-to -fno-allow-store-data-races.
-
-The flag change happened at https://gcc.gnu.org/PR92046.
-
-Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
-Acked-by: Jiri Kosina <jkosina@suse.cz>
-Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
----
- Makefile | 1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/Makefile b/Makefile
-index 5dedd6f9ad75..6899bfc9dc7b 100644
---- a/Makefile
-+++ b/Makefile
-@@ -714,6 +714,7 @@ endif
- 
- # Tell gcc to never replace conditional load with a non-conditional one
- KBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
-+KBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
- 
- include scripts/Makefile.kcov
- include scripts/Makefile.gcc-plugins
--- 
-cgit v1.2.3-1-gf6bb5
-
diff --git a/0005-x86-Fix-early-boot-crash-on-gcc-10-next-try.patch b/0005-x86-Fix-early-boot-crash-on-gcc-10-next-try.patch
deleted file mode 100644
index 140111c..0000000
--- a/0005-x86-Fix-early-boot-crash-on-gcc-10-next-try.patch
+++ /dev/null
@@ -1,131 +0,0 @@
-From 309b6eca2e2605accf7a3b02b47b5c2732dbe543 Mon Sep 17 00:00:00 2001
-From: Borislav Petkov <bp@suse.de>
-Date: Wed, 22 Apr 2020 18:11:30 +0200
-Subject: x86: Fix early boot crash on gcc-10, next try
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-... or the odyssey of trying to disable the stack protector for the
-function which generates the stack canary value.
-
-The whole story started with Sergei reporting a boot crash with a kernel
-built with gcc-10:
-
-  Kernel panic — not syncing: stack-protector: Kernel stack is corrupted in: start_secondary
-  CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc5—00235—gfffb08b37df9 #139
-  Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./H77M—D3H, BIOS F12 11/14/2013
-  Call Trace:
-    dump_stack
-    panic
-    ? start_secondary
-    __stack_chk_fail
-    start_secondary
-    secondary_startup_64
-  -—-[ end Kernel panic — not syncing: stack—protector: Kernel stack is corrupted in: start_secondary
-
-This happens because gcc-10 tail-call optimizes the last function call
-in start_secondary() - cpu_startup_entry() - and thus emits a stack
-canary check which fails because the canary value changes after the
-boot_init_stack_canary() call.
-
-To fix that, the initial attempt was to mark the one function which
-generates the stack canary with:
-
-  __attribute__((optimize("-fno-stack-protector"))) ... start_secondary(void *unused)
-
-however, using the optimize attribute doesn't work cumulatively
-as the attribute does not add to but rather replaces previously
-supplied optimization options - roughly all -fxxx options.
-
-The key one among them being -fno-omit-frame-pointer and thus leading to
-not present frame pointer - frame pointer which the kernel needs.
-
-The next attempt to prevent compilers from tail-call optimizing
-the last function call cpu_startup_entry(), shy of carving out
-start_secondary() into a separate compilation unit and building it with
--fno-stack-protector, is this one.
-
-The current solution is short and sweet, and reportedly, is supported by
-both compilers so let's see how far we'll get this time.
-
-Reported-by: Sergei Trofimovich <slyfox@gentoo.org>
-Signed-off-by: Borislav Petkov <bp@suse.de>
-Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
-Reviewed-by: Kees Cook <keescook@chromium.org>
-Link: https://lkml.kernel.org/r/20200314164451.346497-1-slyfox@gentoo.org
----
- arch/x86/include/asm/stackprotector.h | 7 ++++++-
- arch/x86/kernel/smpboot.c             | 8 ++++++++
- arch/x86/xen/smp_pv.c                 | 1 +
- include/linux/compiler.h              | 6 ++++++
- 4 files changed, 21 insertions(+), 1 deletion(-)
-
-diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h
-index 91e29b6a86a5..9804a7957f4e 100644
---- a/arch/x86/include/asm/stackprotector.h
-+++ b/arch/x86/include/asm/stackprotector.h
-@@ -55,8 +55,13 @@
- /*
-  * Initialize the stackprotector canary value.
-  *
-- * NOTE: this must only be called from functions that never return,
-+ * NOTE: this must only be called from functions that never return
-  * and it must always be inlined.
-+ *
-+ * In addition, it should be called from a compilation unit for which
-+ * stack protector is disabled. Alternatively, the caller should not end
-+ * with a function call which gets tail-call optimized as that would
-+ * lead to checking a modified canary value.
-  */
- static __always_inline void boot_init_stack_canary(void)
- {
-diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
-index 69881b2d446c..9674321ce3a3 100644
---- a/arch/x86/kernel/smpboot.c
-+++ b/arch/x86/kernel/smpboot.c
-@@ -262,6 +262,14 @@ static void notrace start_secondary(void *unused)
- 
- 	wmb();
- 	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
-+
-+	/*
-+	 * Prevent tail call to cpu_startup_entry() because the stack protector
-+	 * guard has been changed a couple of function calls up, in
-+	 * boot_init_stack_canary() and must not be checked before tail calling
-+	 * another function.
-+	 */
-+	prevent_tail_call_optimization();
- }
- 
- /**
-diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
-index 802ee5bba66c..0cebe5db691d 100644
---- a/arch/x86/xen/smp_pv.c
-+++ b/arch/x86/xen/smp_pv.c
-@@ -92,6 +92,7 @@ asmlinkage __visible void cpu_bringup_and_idle(void)
- 	cpu_bringup();
- 	boot_init_stack_canary();
- 	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
-+	prevent_tail_call_optimization();
- }
- 
- void xen_smp_intr_free_pv(unsigned int cpu)
-diff --git a/include/linux/compiler.h b/include/linux/compiler.h
-index 034b0a644efc..732754d96039 100644
---- a/include/linux/compiler.h
-+++ b/include/linux/compiler.h
-@@ -356,4 +356,10 @@ static inline void *offset_to_ptr(const int *off)
- /* &a[0] degrades to a pointer: a different type from an array */
- #define __must_be_array(a)	BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
- 
-+/*
-+ * This is needed in functions which generate the stack canary, see
-+ * arch/x86/kernel/smpboot.c::start_secondary() for an example.
-+ */
-+#define prevent_tail_call_optimization()	asm("")
-+
- #endif /* __LINUX_COMPILER_H */
--- 
-cgit v1.2.3-1-gf6bb5
-
diff --git a/PKGBUILD b/PKGBUILD
index 2a3560c..419bb33 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -19,11 +19,11 @@ _pkgbase=linux-hardened
 pkgbase=linux-libre-hardened
 _supver=5
 _majver=6
-_minver=13
-_hardenedver=a
-_gccpatchver='20191217'
-_gccpatchger='9.1'
-_gccpatchker='5.5'
+_minver=15
+_hardenedver=b
+_gccpatchver='20200527'
+_gccpatchger='10.1'
+_gccpatchker='5.6'
   if [ "$_minver" == "0" ]; then
     _pkgver=${_supver}.${_majver}
   else
@@ -48,10 +48,6 @@ _gnupkgver=${_pkgver}-gnu
 source=(
   https://linux-libre.fsfla.org/pub/linux-libre/releases/${_gnumajver}/linux-libre-${_gnumajver}.tar.xz{,.sign}
   https://github.com/anthraxx/${_pkgbase}/releases/download/${pkgver}/${_pkgbase}-${pkgver}.patch{,.sig}
-  0002-gcc-plugins-drop-support-for-GCC-47.patch
-  0003-gcc-common.h-Update-for-GCC-10.patch
-  0004-Makefile-disallow-data-races-on-gcc-10-as-well.patch
-  0005-x86-Fix-early-boot-crash-on-gcc-10-next-try.patch
   graysky_bdver2-hotfix.patch
   kernel_gcc_patch-${_gccpatchver}.tar.gz::https://github.com/graysky2/kernel_gcc_patch/archive/${_gccpatchver}.tar.gz
   ath9k-regdom-hack.patch
@@ -68,19 +64,15 @@ validpgpkeys=(
 )
 b2sums=('921a3836ffbd5ababb897b8d923ab3e97c10c39b8d01060fe41742005f8111b5c2c9e76c9b7bcf4fe59a056454a364eca5df8006ca8a174205df152007e18dff'
         'SKIP'
-        '5b6225392ab4013dd9d048cd774197fb5a8cab6bcd595054c1ceaa11503e678e18651a4b415f2f64f65a9328393130f4f1833cace841df8c7c2ee1000af1132a'
+        'd17fb26b7c99d329d2b8c2980e23528f3abf0ac3930f255172778c697bd5623e93c780c23d35b2c9d701da106a5fa9b874fbbd715b64fb189d26b83615dea7b8'
         'SKIP'
-        'bb02c251158116f98241f7de95339fb3ffee4748171c89bb5ef666ec28676c4a36fe6ff5d93d315b451aac4cb56343c435cdd46d3249d09e2a8cba47bba594eb'
-        'e59aa4ed958bad23f84d1cfb567d97090ca1a4f442c52297786035db89823eac3fc603035304d9466db87b62664b3c444c2749019eb963e0cbc8752d78fc684f'
-        '0c0115ef2ef1f7b82f6de806b940dca7ef09a99ab872d589996e88dee76ce9946352ab4ef895fc7dfd73cc58a3dac343a426d086bd33d27163fdbf7fdf406021'
-        '0afcb581c316e94575cde01a320fd165a5bb1e9b0ddda1a9c7eeb132d66395c2544108607495bb35d79a6d56a7f58abb639c2a4b0d21fe1d0d5b6ed8c64adde9'
         '1892bd22775eac3bcc4d37f4fd30c95346bf3a0888cbbff57fd614973b525390dff2e315ce35b2e498523cceaab94ff21a80475dee8df3de4dd8fc0fab07d74e'
-        'd76bd0bf237ea2bb7999fd3715cb664d89148cb0ade8057d57cdb40bc0a7954336e50ee077312e5e192398b0f35f055786deb98af9130d57e60f2ea040fbb66f'
+        'c8a52c056ecaeba55bee0b17c6a264d460792694e883b5654b8c1694b376a25be4aff1e6b86b5e3486c6e3adfc2062f805e91a9cac1156d0104d7e781028bec6'
         '2e58bb89b247b1678355368956e67c1de51fcde97a227b2162f6771e30f17fa5520faafe7be4b6816a542e7ae10d05f64c6b6354f352c12746d4b8da632936dd'
         'fde132f3705d908e6f2147c78a2193289916d72304ca5efa2229d79fc3e57a857314ce94e71425caef2f7f7b6cf87f05ef86335dc8bd4be78e7035afe608005a'
-        '26722fd089d161b50702718cd5e6a85a8aac971ef3af3168b6854bfc450e7cfb58307956d7f73ed051a74a3e09ee6e91979bcf911d68885d4e604e36c90eecd2'
+        'be6ce87746752a05eec4c8b62453ebbb5be304ea92e76b8f33f6dd2610bd5dc11adc4b9458784fb4ff712e7c17b3c4dd0751d54f07e6f23caccacb685f3496b6'
         'b4e1377d97ad7e8144d6e55b6d43731e3271a5aec65b65ca6d81026a95f15f549b9303fb3c6f492099ca691e3f65f4cf7f0c3aa742df03b396d7f6d81813aa95'
-        'b6b50376d15867f42c0e071e103739c370092ea762d618c41874bb35d1c6c975235e24f119aaecf88715637fba361458d69caad6a13f0ff11ba6d3fb7f41aec4'
+        '118e75887377a60634591e4aced718f9098ba57df5e517ac1b20725b5423f7e0a5d8f04b51ba6bfb080c2739721d7795f342df125ca514d0dc5d850223b09757'
         'SKIP')
 
 export KBUILD_BUILD_HOST=$pkgbase
@@ -99,10 +91,6 @@ prepare() {
 
   # Hotfixes
   echo "Applying hotfixes"
-  patch -p1 -i ../0002-gcc-plugins-drop-support-for-GCC-47.patch
-  patch -p1 -i ../0003-gcc-common.h-Update-for-GCC-10.patch
-  patch -p1 -i ../0004-Makefile-disallow-data-races-on-gcc-10-as-well.patch
-  patch -p1 -i ../0005-x86-Fix-early-boot-crash-on-gcc-10-next-try.patch
   patch -p1 -i ../sphinx-workaround.patch
 
 
diff --git a/config b/config
index faa16ff..e7adc51 100644
--- a/config
+++ b/config
@@ -4,15 +4,14 @@
 #
 
 #
-# Compiler: gcc (GCC) 9.3.0
+# Compiler: gcc (GCC) 10.1.0
 #
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=90300
+CONFIG_GCC_VERSION=100100
 CONFIG_CLANG_VERSION=0
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO=y
 CONFIG_CC_HAS_ASM_INLINE=y
-CONFIG_CC_HAS_WARN_MAYBE_UNINITIALIZED=y
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
 CONFIG_THREAD_INFO_IN_TASK=y
@@ -985,6 +984,7 @@ CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
 CONFIG_QUEUED_SPINLOCKS=y
 CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
 CONFIG_QUEUED_RWLOCKS=y
+CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y
 CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y
 CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
 CONFIG_FREEZER=y