Merge branch '2020-07-01-kconfig-etc-updates' into next

- Resync Kconfiglib with the v14.1.0 release.
- Re-sync our <linux/compiler*h> files with v5.7-rc5 from upstream.
- Fully resync checkpatch.pl with v5.7 release.

To safely to all of the above, we have a few bugfixes about functions
that need a 'static inline' but weren't.  We also stop setting
CROSS_COMPILE in arch/*/config.mk.  Finally, with the above changes
boards can now opt-in to optimizing inlining and we do this for the
socfpga stratix10 platform for space savings.

Kconfig

@@ -5,6 +5,10 @@
 #
 mainmenu "U-Boot $(UBOOTVERSION) Configuration"
 
+comment "Compiler: $(CC_VERSION_TEXT)"
+
+source "scripts/Kconfig.include"
+
 # Allow defaults in arch-specific code to override any given here
 source "arch/Kconfig"
 
@@ -62,6 +66,35 @@ config CC_OPTIMIZE_FOR_SIZE
 
 	  This option is enabled by default for U-Boot.
 
+config OPTIMIZE_INLINING
+	bool "Allow compiler to uninline functions marked 'inline' in full U-Boot"
+	default n
+	help
+	  This option determines if U-Boot forces gcc to inline the functions
+	  developers have marked 'inline'. Doing so takes away freedom from gcc to
+	  do what it thinks is best, which is desirable in some cases for size
+	  reasons.
+
+config SPL_OPTIMIZE_INLINING
+	bool "Allow compiler to uninline functions marked 'inline' in SPL"
+	depends on SPL
+	default n
+	help
+	  This option determines if U-Boot forces gcc to inline the functions
+	  developers have marked 'inline'. Doing so takes away freedom from gcc to
+	  do what it thinks is best, which is desirable in some cases for size
+	  reasons.
+
+config TPL_OPTIMIZE_INLINING
+	bool "Allow compiler to uninline functions marked 'inline' in TPL"
+	depends on TPL
+	default n
+	help
+	  This option determines if U-Boot forces gcc to inline the functions
+	  developers have marked 'inline'. Doing so takes away freedom from gcc to
+	  do what it thinks is best, which is desirable in some cases for size
+	  reasons.
+
 config CC_COVERAGE
 	bool "Enable code coverage analysis"
 	depends on SANDBOX
@@ -69,6 +102,9 @@ config CC_COVERAGE
 	  Enabling this option will pass "--coverage" to gcc to compile
 	  and link code instrumented for coverage analysis.
 
+config CC_HAS_ASM_INLINE
+	def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
+
 config DISTRO_DEFAULTS
 	bool "Select defaults suitable for booting general purpose Linux distributions"
 	select AUTO_COMPLETE

Makefile

@@ -683,6 +683,9 @@ KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks)
 # disable stringop warnings in gcc 8+
 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
 
+# Enabled with W=2, disabled by default as noisy
+KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
+
 # change __FILE__ to the relative path from the srctree
 KBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
 

arch/arm/mach-socfpga/include/mach/misc.h

@@ -20,7 +20,7 @@ extern struct bsel bsel_str[];
 #ifdef CONFIG_FPGA
 void socfpga_fpga_add(void *fpga_desc);
 #else
-inline void socfpga_fpga_add(void *fpga_desc) {}
+static inline void socfpga_fpga_add(void *fpga_desc) {}
 #endif
 
 #ifdef CONFIG_TARGET_SOCFPGA_GEN5

arch/arm/mach-tegra/ivc.c

@@ -124,11 +124,11 @@ static inline int tegra_ivc_channel_empty(struct tegra_ivc *ivc,
 {
 	/*
 	 * This function performs multiple checks on the same values with
-	 * security implications, so create snapshots with ACCESS_ONCE() to
+	 * security implications, so create snapshots with READ_ONCE() to
 	 * ensure that these checks use the same values.
 	 */
-	uint32_t w_count = ACCESS_ONCE(ch->w_count);
-	uint32_t r_count = ACCESS_ONCE(ch->r_count);
+	uint32_t w_count = READ_ONCE(ch->w_count);
+	uint32_t r_count = READ_ONCE(ch->r_count);
 
 	/*
 	 * Perform an over-full check to prevent denial of service attacks where
@@ -153,14 +153,14 @@ static inline int tegra_ivc_channel_full(struct tegra_ivc *ivc,
 	 * Invalid cases where the counters indicate that the queue is over
 	 * capacity also appear full.
 	 */
-	return (ACCESS_ONCE(ch->w_count) - ACCESS_ONCE(ch->r_count)) >=
+	return (READ_ONCE(ch->w_count) - READ_ONCE(ch->r_count)) >=
 	       ivc->nframes;
 }
 
 static inline void tegra_ivc_advance_rx(struct tegra_ivc *ivc)
 {
-	ACCESS_ONCE(ivc->rx_channel->r_count) =
-			ACCESS_ONCE(ivc->rx_channel->r_count) + 1;
+	WRITE_ONCE(ivc->rx_channel->r_count,
+		   READ_ONCE(ivc->rx_channel->r_count) + 1);
 
 	if (ivc->r_pos == ivc->nframes - 1)
 		ivc->r_pos = 0;
@@ -170,8 +170,8 @@ static inline void tegra_ivc_advance_rx(struct tegra_ivc *ivc)
 
 static inline void tegra_ivc_advance_tx(struct tegra_ivc *ivc)
 {
-	ACCESS_ONCE(ivc->tx_channel->w_count) =
-			ACCESS_ONCE(ivc->tx_channel->w_count) + 1;
+	WRITE_ONCE(ivc->tx_channel->w_count,
+		   READ_ONCE(ivc->tx_channel->w_count) + 1);
 
 	if (ivc->w_pos == ivc->nframes - 1)
 		ivc->w_pos = 0;
@@ -232,7 +232,7 @@ static inline uint32_t tegra_ivc_channel_avail_count(struct tegra_ivc *ivc,
 	 * comment in tegra_ivc_channel_empty() for an explanation about
 	 * special over-full considerations.
 	 */
-	return ACCESS_ONCE(ch->w_count) - ACCESS_ONCE(ch->r_count);
+	return READ_ONCE(ch->w_count) - READ_ONCE(ch->r_count);
 }
 
 int tegra_ivc_read_get_next_frame(struct tegra_ivc *ivc, void **frame)
@@ -358,7 +358,7 @@ int tegra_ivc_channel_notified(struct tegra_ivc *ivc)
 	/* Copy the receiver's state out of shared memory. */
 	offset = offsetof(struct tegra_ivc_channel_header, w_count);
 	tegra_ivc_invalidate_counter(ivc, ivc->rx_channel, offset);
-	peer_state = ACCESS_ONCE(ivc->rx_channel->state);
+	peer_state = READ_ONCE(ivc->rx_channel->state);
 
 	if (peer_state == ivc_state_sync) {
 		/*

arch/m68k/config.mk

@@ -3,10 +3,6 @@
 # (C) Copyright 2000-2002
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := m68k-elf-
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x20000
 
 PLATFORM_CPPFLAGS += -D__M68K__

arch/microblaze/config.mk

@@ -6,10 +6,6 @@
 # (C) Copyright 2004 Atmark Techno, Inc.
 # Yasushi SHOJI <yashi@atmark-techno.com>
 
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := mb-
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x80F00000
 
 PLATFORM_CPPFLAGS += -ffixed-r31 -D__microblaze__

arch/nds32/config.mk

@@ -8,10 +8,6 @@
 # Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
 #
 
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := nds32le-linux-
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR = 0x300000
 LDFLAGS_STANDALONE	+= -T $(srctree)/examples/standalone/nds32.lds
 

arch/nios2/config.mk

@@ -4,10 +4,6 @@
 # Psyent Corporation <www.psyent.com>
 # Scott McNutt <smcnutt@psyent.com>
 
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := nios2-elf-
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x02000000
 
 PLATFORM_CPPFLAGS += -D__NIOS2__

arch/powerpc/config.mk

@@ -3,10 +3,6 @@
 # (C) Copyright 2000-2010
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := ppc_8xx-
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x40000
 LDFLAGS_FINAL += --gc-sections
 LDFLAGS_FINAL += --bss-plt

arch/sh/config.mk

@@ -3,10 +3,6 @@
 # (C) Copyright 2000-2002
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := sh4-linux-
-endif
-
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x8C000000
 ifeq ($(CPU),sh2)
 LDFLAGS_STANDALONE += -EB

arch/x86/cpu/config.mk

@@ -3,8 +3,6 @@
 # (C) Copyright 2002
 # Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
 
-CROSS_COMPILE ?= i386-linux-
-
 # DO NOT MODIFY THE FOLLOWING UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!
 LDPPFLAGS += -DRESET_SEG_START=$(CONFIG_RESET_SEG_START)
 LDPPFLAGS += -DRESET_VEC_LOC=$(CONFIG_RESET_VEC_LOC)

arch/x86/include/asm/atomic.h

@@ -23,7 +23,7 @@ typedef struct { volatile int counter; } atomic_t;
  */
 static inline int atomic_read(const atomic_t *v)
 {
-	return ACCESS_ONCE((v)->counter);
+	return READ_ONCE((v)->counter);
 }
 
 /**

arch/xtensa/config.mk

@@ -3,7 +3,6 @@
 # (C) Copyright 2007 - 2013 Tensilica, Inc.
 # (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
 
-CROSS_COMPILE ?= xtensa-linux-
 PLATFORM_CPPFLAGS += -D__XTENSA__ -mlongcalls -mforce-no-pic \
 		     -ffunction-sections -fdata-sections
 

configs/socfpga_stratix10_defconfig

@@ -12,6 +12,8 @@ CONFIG_TARGET_SOCFPGA_STRATIX10_SOCDK=y
 CONFIG_IDENT_STRING="socfpga_stratix10"
 CONFIG_SPL_FS_FAT=y
 CONFIG_SPL_TEXT_BASE=0xFFE00000
+CONFIG_OPTIMIZE_INLINING=y
+CONFIG_SPL_OPTIMIZE_INLINING=y
 CONFIG_BOOTDELAY=5
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="earlycon"

drivers/pci/pcie_rockchip.h

@@ -130,13 +130,12 @@ struct rockchip_pcie {
 
 int rockchip_pcie_phy_get(struct udevice *dev);
 
-inline struct rockchip_pcie_phy *pcie_get_phy(struct rockchip_pcie *pcie)
+static inline struct rockchip_pcie_phy *pcie_get_phy(struct rockchip_pcie *pcie)
 {
 	return pcie->phy;
 }
 
-inline
-struct rockchip_pcie_phy_ops *phy_get_ops(struct rockchip_pcie_phy *phy)
+static inline struct rockchip_pcie_phy_ops *phy_get_ops(struct rockchip_pcie_phy *phy)
 {
 	return (struct rockchip_pcie_phy_ops *)phy->ops;
 }

include/linux/compiler-clang.h

-#ifndef __LINUX_COMPILER_H
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_COMPILER_TYPES_H
 #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
 #endif
 
-/* Some compiler specific definitions are overwritten here
- * for Clang compiler
- */
+/* Compiler specific definitions for Clang compiler */
 
-#ifdef uninitialized_var
-#undef uninitialized_var
 #define uninitialized_var(x) x = *(&(x))
+
+/* same as gcc, this was present in clang-2.6 so we can assume it works
+ * with any version that can compile the kernel
+ */
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+
+/* all clang versions usable with the kernel support KASAN ABI version 5 */
+#define KASAN_ABI_VERSION 5
+
+#if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
+/* emulate gcc's __SANITIZE_ADDRESS__ flag */
+#define __SANITIZE_ADDRESS__
+#define __no_sanitize_address \
+		__attribute__((no_sanitize("address", "hwaddress")))
+#else
+#define __no_sanitize_address
 #endif
+
+/*
+ * Not all versions of clang implement the the type-generic versions
+ * of the builtin overflow checkers. Fortunately, clang implements
+ * __has_builtin allowing us to avoid awkward version
+ * checks. Unfortunately, we don't know which version of gcc clang
+ * pretends to be, so the macro may or may not be defined.
+ */
+#if __has_builtin(__builtin_mul_overflow) && \
+    __has_builtin(__builtin_add_overflow) && \
+    __has_builtin(__builtin_sub_overflow)
+#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
+#endif
+
+/* The following are for compatibility with GCC, from compiler-gcc.h,
+ * and may be redefined here because they should not be shared with other
+ * compilers, like ICC.
+ */
+#define barrier() __asm__ __volatile__("" : : : "memory")

include/linux/compiler-gcc.h

-#ifndef __LINUX_COMPILER_H
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_COMPILER_TYPES_H
 #error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
 #endif
 
@@ -9,11 +10,14 @@
 		     + __GNUC_MINOR__ * 100	\
 		     + __GNUC_PATCHLEVEL__)
 
+#if GCC_VERSION < 40600
+# error Sorry, your compiler is too old - please upgrade it.
+#endif
+
 /* Optimization barrier */
 
 /* The "volatile" is due to gcc bugs */
-#define barrier() \
-	__asm__ __volatile__("": : :"memory")
+#define barrier() __asm__ __volatile__("": : :"memory")
 /*
  * This version is i.e. to prevent dead stores elimination on @ptr
  * where gcc and llvm may behave differently when otherwise using
@@ -22,13 +26,12 @@
  * clobbered. The issue is as follows: while the inline asm might
  * access any memory it wants, the compiler could have fit all of
  * @ptr into memory registers instead, and since @ptr never escaped
- * from that, it proofed that the inline asm wasn't touching any of
+ * from that, it proved that the inline asm wasn't touching any of
  * it. This version works well with both compilers, i.e. we're telling
  * the compiler that the inline asm absolutely may see the contents
  * of @ptr. See also: https://llvm.org/bugs/show_bug.cgi?id=15495
  */
-#define barrier_data(ptr) \
-	__asm__ __volatile__("": :"r"(ptr) :"memory")
+#define barrier_data(ptr) __asm__ __volatile__("": :"r"(ptr) :"memory")
 
 /*
  * This macro obfuscates arithmetic on a variable address so that gcc
@@ -55,181 +58,54 @@
 	(typeof(ptr)) (__ptr + (off));					\
 })
 
-/* Make the optimizer believe the variable can be manipulated arbitrarily. */
-#define OPTIMIZER_HIDE_VAR(var)						\
-	__asm__ ("" : "=r" (var) : "0" (var))
-
-#ifdef __CHECKER__
-#define __must_be_array(a)	0
-#else
-/* &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]))
-#endif
-
-/*
- * Force always-inline if the user requests it so via the .config,
- * or if gcc is too old:
- */
-#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) ||		\
-    !defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
-#define inline		inline		__attribute__((always_inline)) notrace
-#define __inline__	__inline__	__attribute__((always_inline)) notrace
-#define __inline	__inline	__attribute__((always_inline)) notrace
-#else
-/* A lot of inline functions can cause havoc with function tracing */
-#define inline		inline		notrace
-#define __inline__	__inline__	notrace
-#define __inline	__inline	notrace
-#endif
-
-#define __always_inline	inline __attribute__((always_inline))
-#define  noinline	__attribute__((noinline))
-
-#define __deprecated	__attribute__((deprecated))
-#define __packed	__attribute__((packed))
-#define __weak		__attribute__((weak))
-#define __alias(symbol)	__attribute__((alias(#symbol)))
-
 /*
- * it doesn't make sense on ARM (currently the only user of __naked)
- * to trace naked functions because then mcount is called without
- * stack and frame pointer being set up and there is no chance to
- * restore the lr register to the value before mcount was called.
- *
- * The asm() bodies of naked functions often depend on standard calling
- * conventions, therefore they must be noinline and noclone.
- *
- * GCC 4.[56] currently fail to enforce this, so we must do so ourselves.
- * See GCC PR44290.
- */
-#define __naked		__attribute__((naked)) noinline __noclone notrace
-
-#define __noreturn	__attribute__((noreturn))
-
-/*
- * From the GCC manual:
- *
- * Many functions have no effects except the return value and their
- * return value depends only on the parameters and/or global
- * variables.  Such a function can be subject to common subexpression
- * elimination and loop optimization just as an arithmetic operator
- * would be.
- * [...]
+ * A trick to suppress uninitialized variable warning without generating any
+ * code
  */
-#define __pure			__attribute__((pure))
-#define __aligned(x)		__attribute__((aligned(x)))
-#define __printf(a, b)		__attribute__((format(printf, a, b)))
-#define __scanf(a, b)		__attribute__((format(scanf, a, b)))
-#define __attribute_const__	__attribute__((__const__))
-#define __maybe_unused		__attribute__((unused))
-#define __always_unused		__attribute__((unused))
-
-/* gcc version specific checks */
-
-#if GCC_VERSION < 30200
-# error Sorry, your compiler is too old - please upgrade it.
-#endif
-
-#if GCC_VERSION < 30300
-# define __used			__attribute__((__unused__))
-#else
-# define __used			__attribute__((__used__))
-#endif
-
-#ifdef CONFIG_GCOV_KERNEL
-# if GCC_VERSION < 30400
-#   error "GCOV profiling support for gcc versions below 3.4 not included"
-# endif /* __GNUC_MINOR__ */
-#endif /* CONFIG_GCOV_KERNEL */
+#define uninitialized_var(x) x = x
 
-#if GCC_VERSION >= 30400
-#define __must_check		__attribute__((warn_unused_result))
+#ifdef CONFIG_RETPOLINE
+#define __noretpoline __attribute__((__indirect_branch__("keep")))
 #endif
 
-#if GCC_VERSION >= 40000
+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
 
-/* GCC 4.1.[01] miscompiles __weak */
-#ifdef __KERNEL__
-# if GCC_VERSION >= 40100 &&  GCC_VERSION <= 40101
-#  error Your version of gcc miscompiles the __weak directive
-# endif
-#endif
+#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
 
-#define __used			__attribute__((__used__))
-#define __compiler_offsetof(a, b)					\
-	__builtin_offsetof(a, b)
+#define __compiletime_warning(message) __attribute__((__warning__(message)))
+#define __compiletime_error(message) __attribute__((__error__(message)))
 
-#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
-# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
+#if defined(LATENT_ENTROPY_PLUGIN) && !defined(__CHECKER__)
+#define __latent_entropy __attribute__((latent_entropy))
 #endif
 
-#if GCC_VERSION >= 40300
-/* Mark functions as cold. gcc will assume any path leading to a call
- * to them will be unlikely.  This means a lot of manual unlikely()s
- * are unnecessary now for any paths leading to the usual suspects
- * like BUG(), printk(), panic() etc. [but let's keep them for now for
- * older compilers]
- *
- * Early snapshots of gcc 4.3 don't support this and we can't detect this
- * in the preprocessor, but we can live with this because they're unreleased.
- * Maketime probing would be overkill here.
+/*
+ * calling noreturn functions, __builtin_unreachable() and __builtin_trap()
+ * confuse the stack allocation in gcc, leading to overly large stack
+ * frames, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365
  *
- * gcc also has a __attribute__((__hot__)) to move hot functions into
- * a special section, but I don't see any sense in this right now in
- * the kernel context
+ * Adding an empty inline assembly before it works around the problem
  */
-#define __cold			__attribute__((__cold__))
-
-#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+#define barrier_before_unreachable() asm volatile("")
 
-#ifndef __CHECKER__
-# define __compiletime_warning(message) __attribute__((warning(message)))
-# define __compiletime_error(message) __attribute__((error(message)))
-#endif /* __CHECKER__ */
-#endif /* GCC_VERSION >= 40300 */
-
-#if GCC_VERSION >= 40500
 /*
  * Mark a position in code as unreachable.  This can be used to
  * suppress control flow warnings after asm blocks that transfer
  * control elsewhere.
- *
- * Early snapshots of gcc 4.5 don't support this and we can't detect
- * this in the preprocessor, but we can live with this because they're
- * unreleased.  Really, we need to have autoconf for the kernel.
- */
-#define unreachable() __builtin_unreachable()
-
-/* Mark a function definition as prohibited from being cloned. */
-#define __noclone	__attribute__((__noclone__))
-
-#endif /* GCC_VERSION >= 40500 */
-
-#if GCC_VERSION >= 40600
-/*
- * When used with Link Time Optimization, gcc can optimize away C functions or
- * variables which are referenced only from assembly code.  __visible tells the
- * optimizer that something else uses this function or variable, thus preventing
- * this.
  */
-#define __visible	__attribute__((externally_visible))
-#endif
-
+#define unreachable() \
+	do {					\
+		annotate_unreachable();		\
+		barrier_before_unreachable();	\
+		__builtin_unreachable();	\
+	} while (0)
 
-#if GCC_VERSION >= 40900 && !defined(__CHECKER__)
-/*
- * __assume_aligned(n, k): Tell the optimizer that the returned
- * pointer can be assumed to be k modulo n. The second argument is
- * optional (default 0), so we use a variadic macro to make the
- * shorthand.
- *
- * Beware: Do not apply this to functions which may return
- * ERR_PTRs. Also, it is probably unwise to apply it to functions
- * returning extra information in the low bits (but in that case the
- * compiler should see some alignment anyway, when the return value is
- * massaged by 'flags = ptr & 3; ptr &= ~3;').
- */
-#define __assume_aligned(a, ...) __attribute__((__assume_aligned__(a, ## __VA_ARGS__)))
+#if defined(RANDSTRUCT_PLUGIN) && !defined(__CHECKER__)
+#define __randomize_layout __attribute__((randomize_layout))
+#define __no_randomize_layout __attribute__((no_randomize_layout))
+/* This anon struct can add padding, so only enable it under randstruct. */
+#define randomized_struct_fields_start	struct {
+#define randomized_struct_fields_end	} __randomize_layout;
 #endif
 
 /*
@@ -243,43 +119,56 @@
  */
 #define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)
 
-#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
-#if GCC_VERSION >= 40400
+/*
+ * sparse (__CHECKER__) pretends to be gcc, but can't do constant
+ * folding in __builtin_bswap*() (yet), so don't set these for it.
+ */
+#if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP) && !defined(__CHECKER__)
 #define __HAVE_BUILTIN_BSWAP32__
 #define __HAVE_BUILTIN_BSWAP64__
-#endif
-#if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600)
+#if GCC_VERSION >= 40800
 #define __HAVE_BUILTIN_BSWAP16__
 #endif
-#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP && !__CHECKER__ */
 
-#if GCC_VERSION >= 50000
+#if GCC_VERSION >= 70000
+#define KASAN_ABI_VERSION 5
+#elif GCC_VERSION >= 50000
 #define KASAN_ABI_VERSION 4
 #elif GCC_VERSION >= 40902
 #define KASAN_ABI_VERSION 3
 #endif
 
-#if GCC_VERSION >= 40902
-/*
- * Tell the compiler that address safety instrumentation (KASAN)
- * should not be applied to that function.
- * Conflicts with inlining: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
- */
+#if __has_attribute(__no_sanitize_address__)
 #define __no_sanitize_address __attribute__((no_sanitize_address))
+#else
+#define __no_sanitize_address
 #endif
 
-#endif	/* gcc version >= 40000 specific checks */
-
-#if !defined(__noclone)
-#define __noclone	/* not needed */
-#endif
-
-#if !defined(__no_sanitize_address)
-#define __no_sanitize_address
+#if GCC_VERSION >= 50100
+#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
 #endif
 
 /*
- * A trick to suppress uninitialized variable warning without generating any
- * code
+ * Turn individual warnings and errors on and off locally, depending
+ * on version.
  */
-#define uninitialized_var(x) x = x
+#define __diag_GCC(version, severity, s) \
+	__diag_GCC_ ## version(__diag_GCC_ ## severity s)
+
+/* Severity used in pragma directives */
+#define __diag_GCC_ignore	ignored
+#define __diag_GCC_warn		warning
+#define __diag_GCC_error	error
+
+#define __diag_str1(s)		#s
+#define __diag_str(s)		__diag_str1(s)
+#define __diag(s)		_Pragma(__diag_str(GCC diagnostic s))
+
+#if GCC_VERSION >= 80000
+#define __diag_GCC_8(s)		__diag(s)
+#else
+#define __diag_GCC_8(s)
+#endif
+
+#define __no_fgcse __attribute__((optimize("-fno-gcse")))

include/linux/compiler-intel.h

-#ifndef __LINUX_COMPILER_H
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_COMPILER_TYPES_H
 #error "Please don't include <linux/compiler-intel.h> directly, include <linux/compiler.h> instead."
 #endif
 
 #ifdef __ECC
 
-/* Some compiler specific definitions are overwritten here
- * for Intel ECC compiler
- */
+/* Compiler specific definitions for Intel ECC compiler */
 
 #include <asm/intrinsics.h>
 
 /* Intel ECC compiler doesn't support gcc specific asm stmts.
  * It uses intrinsics to do the equivalent things.
  */
-#undef barrier
-#undef barrier_data
-#undef RELOC_HIDE
-#undef OPTIMIZER_HIDE_VAR
 
 #define barrier() __memory_barrier()
 #define barrier_data(ptr) barrier()
@@ -32,14 +27,8 @@
  */
 #define OPTIMIZER_HIDE_VAR(var) barrier()
 
-/* Intel ECC compiler doesn't support __builtin_types_compatible_p() */
-#define __must_be_array(a) 0
-
 #endif
 
-#ifndef __HAVE_BUILTIN_BSWAP16__
 /* icc has this, but it's called _bswap16 */
 #define __HAVE_BUILTIN_BSWAP16__
 #define __builtin_bswap16 _bswap16
-#endif
-

include/linux/compiler_attributes.h

+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_COMPILER_ATTRIBUTES_H
+#define __LINUX_COMPILER_ATTRIBUTES_H
+
+/*
+ * The attributes in this file are unconditionally defined and they directly
+ * map to compiler attribute(s), unless one of the compilers does not support
+ * the attribute. In that case, __has_attribute is used to check for support
+ * and the reason is stated in its comment ("Optional: ...").
+ *
+ * Any other "attributes" (i.e. those that depend on a configuration option,
+ * on a compiler, on an architecture, on plugins, on other attributes...)
+ * should be defined elsewhere (e.g. compiler_types.h or compiler-*.h).
+ * The intention is to keep this file as simple as possible, as well as
+ * compiler- and version-agnostic (e.g. avoiding GCC_VERSION checks).
+ *
+ * This file is meant to be sorted (by actual attribute name,
+ * not by #define identifier). Use the __attribute__((__name__)) syntax
+ * (i.e. with underscores) to avoid future collisions with other macros.
+ * Provide links to the documentation of each supported compiler, if it exists.
+ */
+
+/*
+ * __has_attribute is supported on gcc >= 5, clang >= 2.9 and icc >= 17.
+ * In the meantime, to support 4.6 <= gcc < 5, we implement __has_attribute
+ * by hand.
+ *
+ * sparse does not support __has_attribute (yet) and defines __GNUC_MINOR__
+ * depending on the compiler used to build it; however, these attributes have
+ * no semantic effects for sparse, so it does not matter. Also note that,
+ * in order to avoid sparse's warnings, even the unsupported ones must be
+ * defined to 0.
+ */
+#ifndef __has_attribute
+# define __has_attribute(x) __GCC4_has_attribute_##x
+# define __GCC4_has_attribute___assume_aligned__      (__GNUC_MINOR__ >= 9)
+# define __GCC4_has_attribute___copy__                0
+# define __GCC4_has_attribute___designated_init__     0
+# define __GCC4_has_attribute___externally_visible__  1
+# define __GCC4_has_attribute___noclone__             1
+# define __GCC4_has_attribute___nonstring__           0
+# define __GCC4_has_attribute___no_sanitize_address__ (__GNUC_MINOR__ >= 8)
+# define __GCC4_has_attribute___fallthrough__         0
+#endif
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-alias-function-attribute
+ */
+#define __alias(symbol)                 __attribute__((__alias__(#symbol)))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-aligned-function-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-aligned-type-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-aligned-variable-attribute
+ */
+#define __aligned(x)                    __attribute__((__aligned__(x)))
+#define __aligned_largest               __attribute__((__aligned__))
+
+/*
+ * Note: users of __always_inline currently do not write "inline" themselves,
+ * which seems to be required by gcc to apply the attribute according
+ * to its docs (and also "warning: always_inline function might not be
+ * inlinable [-Wattributes]" is emitted).
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-always_005finline-function-attribute
+ * clang: mentioned
+ */
+#define __always_inline                 inline __attribute__((__always_inline__))
+
+/*
+ * The second argument is optional (default 0), so we use a variadic macro
+ * to make the shorthand.
+ *
+ * Beware: Do not apply this to functions which may return
+ * ERR_PTRs. Also, it is probably unwise to apply it to functions
+ * returning extra information in the low bits (but in that case the
+ * compiler should see some alignment anyway, when the return value is
+ * massaged by 'flags = ptr & 3; ptr &= ~3;').
+ *
+ * Optional: only supported since gcc >= 4.9
+ * Optional: not supported by icc
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-assume_005faligned-function-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#assume-aligned
+ */
+#if __has_attribute(__assume_aligned__)
+# define __assume_aligned(a, ...)       __attribute__((__assume_aligned__(a, ## __VA_ARGS__)))
+#else
+# define __assume_aligned(a, ...)
+#endif
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-cold-function-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-cold-label-attribute
+ */
+#define __cold                          __attribute__((__cold__))
+
+/*
+ * Note the long name.
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-const-function-attribute
+ */
+#define __attribute_const__             __attribute__((__const__))
+
+/*
+ * Optional: only supported since gcc >= 9
+ * Optional: not supported by clang
+ * Optional: not supported by icc
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-copy-function-attribute
+ */
+#if __has_attribute(__copy__)
+# define __copy(symbol)                 __attribute__((__copy__(symbol)))
+#else
+# define __copy(symbol)
+#endif
+
+/*
+ * Don't. Just don't. See commit 771c035372a0 ("deprecate the '__deprecated'
+ * attribute warnings entirely and for good") for more information.
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-deprecated-function-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-deprecated-type-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-deprecated-variable-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Enumerator-Attributes.html#index-deprecated-enumerator-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#deprecated
+ */
+#define __deprecated
+
+/*
+ * Optional: only supported since gcc >= 5.1
+ * Optional: not supported by clang
+ * Optional: not supported by icc
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-designated_005finit-type-attribute
+ */
+#if __has_attribute(__designated_init__)
+# define __designated_init              __attribute__((__designated_init__))
+#else
+# define __designated_init
+#endif
+
+/*
+ * Optional: not supported by clang
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-externally_005fvisible-function-attribute
+ */
+#if __has_attribute(__externally_visible__)
+# define __visible                      __attribute__((__externally_visible__))
+#else
+# define __visible
+#endif
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-format-function-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#format
+ */
+#define __printf(a, b)                  __attribute__((__format__(printf, a, b)))
+#define __scanf(a, b)                   __attribute__((__format__(scanf, a, b)))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-gnu_005finline-function-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#gnu-inline
+ */
+#define __gnu_inline                    __attribute__((__gnu_inline__))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-malloc-function-attribute
+ */
+#define __malloc                        __attribute__((__malloc__))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-mode-type-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-mode-variable-attribute
+ */
+#define __mode(x)                       __attribute__((__mode__(x)))
+
+/*
+ * Optional: not supported by clang
+ *
+ *  gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noclone-function-attribute
+ */
+#if __has_attribute(__noclone__)
+# define __noclone                      __attribute__((__noclone__))
+#else
+# define __noclone
+#endif
+
+/*
+ * Add the pseudo keyword 'fallthrough' so case statement blocks
+ * must end with any of these keywords:
+ *   break;
+ *   fallthrough;
+ *   goto <label>;
+ *   return [expression];
+ *
+ *  gcc: https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html#Statement-Attributes
+ */
+#if __has_attribute(__fallthrough__)
+# define fallthrough                    __attribute__((__fallthrough__))
+#else
+# define fallthrough                    do {} while (0)  /* fallthrough */
+#endif
+
+/*
+ * Note the missing underscores.
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute
+ * clang: mentioned
+ */
+#define   noinline                      __attribute__((__noinline__))
+
+/*
+ * Optional: only supported since gcc >= 8
+ * Optional: not supported by clang
+ * Optional: not supported by icc
+ *
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-nonstring-variable-attribute
+ */
+#if __has_attribute(__nonstring__)
+# define __nonstring                    __attribute__((__nonstring__))
+#else
+# define __nonstring
+#endif
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noreturn-function-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#noreturn
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#id1
+ */
+#define __noreturn                      __attribute__((__noreturn__))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-packed-type-attribute
+ * clang: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-packed-variable-attribute
+ */
+#define __packed                        __attribute__((__packed__))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-pure-function-attribute
+ */
+#define __pure                          __attribute__((__pure__))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-section-function-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-section-variable-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#section-declspec-allocate
+ */
+#define __section(S)                    __attribute__((__section__(#S)))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-unused-function-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-unused-type-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-unused-variable-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-unused-label-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#maybe-unused-unused
+ */
+#define __always_unused                 __attribute__((__unused__))
+#define __maybe_unused                  __attribute__((__unused__))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-used-function-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-used-variable-attribute
+ */
+#define __used                          __attribute__((__used__))
+
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-weak-function-attribute
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-weak-variable-attribute
+ */
+#define __weak                          __attribute__((__weak__))
+
+#endif /* __LINUX_COMPILER_ATTRIBUTES_H */

include/linux/compiler_types.h

+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_COMPILER_TYPES_H
+#define __LINUX_COMPILER_TYPES_H
+
+#ifndef __ASSEMBLY__
+
+#ifdef __CHECKER__
+# define __user		__attribute__((noderef, address_space(1)))
+# define __kernel	__attribute__((address_space(0)))
+# define __safe		__attribute__((safe))
+# define __force	__attribute__((force))
+# define __nocast	__attribute__((nocast))
+# define __iomem	__attribute__((noderef, address_space(2)))
+# define __must_hold(x)	__attribute__((context(x,1,1)))
+# define __acquires(x)	__attribute__((context(x,0,1)))
+# define __releases(x)	__attribute__((context(x,1,0)))
+# define __acquire(x)	__context__(x,1)
+# define __release(x)	__context__(x,-1)
+# define __cond_lock(x,c)	((c) ? ({ __acquire(x); 1; }) : 0)
+# define __percpu	__attribute__((noderef, address_space(3)))
+# define __rcu		__attribute__((noderef, address_space(4)))
+# define __private	__attribute__((noderef))
+extern void __chk_user_ptr(const volatile void __user *);
+extern void __chk_io_ptr(const volatile void __iomem *);
+# define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member))
+#else /* __CHECKER__ */
+# ifdef STRUCTLEAK_PLUGIN
+#  define __user __attribute__((user))
+# else
+#  define __user
+# endif
+# define __kernel
+# define __safe
+# define __force
+# define __nocast
+# define __iomem
+# define __chk_user_ptr(x) (void)0
+# define __chk_io_ptr(x) (void)0
+# define __builtin_warning(x, y...) (1)
+# define __must_hold(x)
+# define __acquires(x)
+# define __releases(x)
+# define __acquire(x) (void)0
+# define __release(x) (void)0
+# define __cond_lock(x,c) (c)
+# define __percpu
+# define __rcu
+# define __private
+# define ACCESS_PRIVATE(p, member) ((p)->member)
+#endif /* __CHECKER__ */
+
+/* Indirect macros required for expanded argument pasting, eg. __LINE__. */
+#define ___PASTE(a,b) a##b
+#define __PASTE(a,b) ___PASTE(a,b)
+
+#ifdef __KERNEL__
+
+/* Attributes */
+#include <linux/compiler_attributes.h>
+
+/* Compiler specific macros. */
+#ifdef __clang__
+#include <linux/compiler-clang.h>
+#elif defined(__INTEL_COMPILER)
+#include <linux/compiler-intel.h>
+#elif defined(__GNUC__)
+/* The above compilers also define __GNUC__, so order is important here. */
+#include <linux/compiler-gcc.h>
+#else
+#error "Unknown compiler"
+#endif
+
+/*
+ * Some architectures need to provide custom definitions of macros provided
+ * by linux/compiler-*.h, and can do so using asm/compiler.h. We include that
+ * conditionally rather than using an asm-generic wrapper in order to avoid
+ * build failures if any C compilation, which will include this file via an
+ * -include argument in c_flags, occurs prior to the asm-generic wrappers being
+ * generated.
+ */
+#ifdef CONFIG_HAVE_ARCH_COMPILER_H
+#include <asm/compiler.h>
+#endif
+
+struct ftrace_branch_data {
+	const char *func;
+	const char *file;
+	unsigned line;
+	union {
+		struct {
+			unsigned long correct;
+			unsigned long incorrect;
+		};
+		struct {
+			unsigned long miss;
+			unsigned long hit;
+		};
+		unsigned long miss_hit[2];
+	};
+};
+
+struct ftrace_likely_data {
+	struct ftrace_branch_data	data;
+	unsigned long			constant;
+};
+
+#ifdef CONFIG_ENABLE_MUST_CHECK
+#define __must_check		__attribute__((__warn_unused_result__))
+#else
+#define __must_check
+#endif
+
+#if defined(CC_USING_HOTPATCH)
+#define notrace			__attribute__((hotpatch(0, 0)))
+#elif defined(CC_USING_PATCHABLE_FUNCTION_ENTRY)
+#define notrace			__attribute__((patchable_function_entry(0, 0)))
+#else
+#define notrace			__attribute__((__no_instrument_function__))
+#endif
+
+/*
+ * it doesn't make sense on ARM (currently the only user of __naked)
+ * to trace naked functions because then mcount is called without
+ * stack and frame pointer being set up and there is no chance to
+ * restore the lr register to the value before mcount was called.
+ */
+#define __naked			__attribute__((__naked__)) notrace
+
+#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)
+
+/*
+ * Force always-inline if the user requests it so via the .config.
+ * Prefer gnu_inline, so that extern inline functions do not emit an
+ * externally visible function. This makes extern inline behave as per gnu89
+ * semantics rather than c99. This prevents multiple symbol definition errors
+ * of extern inline functions at link time.
+ * A lot of inline functions can cause havoc with function tracing.
+ * Do not use __always_inline here, since currently it expands to inline again
+ * (which would break users of __always_inline).
+ */
+#if !CONFIG_IS_ENABLED(OPTIMIZE_INLINING)
+#define inline inline __attribute__((__always_inline__)) __gnu_inline \
+	__inline_maybe_unused notrace
+#else
+#define inline inline                                    __gnu_inline \
+	__inline_maybe_unused notrace
+#endif
+
+/*
+ * gcc provides both __inline__ and __inline as alternate spellings of
+ * the inline keyword, though the latter is undocumented. New kernel
+ * code should only use the inline spelling, but some existing code
+ * uses __inline__. Since we #define inline above, to ensure
+ * __inline__ has the same semantics, we need this #define.
+ *
+ * However, the spelling __inline is strictly reserved for referring
+ * to the bare keyword.
+ */
+#define __inline__ inline
+
+/*
+ * GCC does not warn about unused static inline functions for -Wunused-function.
+ * Suppress the warning in clang as well by using __maybe_unused, but enable it
+ * for W=1 build. This will allow clang to find unused functions. Remove the
+ * __inline_maybe_unused entirely after fixing most of -Wunused-function warnings.
+ */
+#ifdef KBUILD_EXTRA_WARN1
+#define __inline_maybe_unused
+#else
+#define __inline_maybe_unused __maybe_unused
+#endif
+
+/*
+ * Rather then using noinline to prevent stack consumption, use
+ * noinline_for_stack instead.  For documentation reasons.
+ */
+#define noinline_for_stack noinline
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASSEMBLY__ */
+
+/*
+ * The below symbols may be defined for one or more, but not ALL, of the above
+ * compilers. We don't consider that to be an error, so set them to nothing.
+ * For example, some of them are for compiler specific plugins.
+ */
+#ifndef __latent_entropy
+# define __latent_entropy
+#endif
+
+#ifndef __randomize_layout
+# define __randomize_layout __designated_init
+#endif
+
+#ifndef __no_randomize_layout
+# define __no_randomize_layout
+#endif
+
+#ifndef randomized_struct_fields_start
+# define randomized_struct_fields_start
+# define randomized_struct_fields_end
+#endif
+
+#ifndef asm_volatile_goto
+#define asm_volatile_goto(x...) asm goto(x)
+#endif
+
+#ifdef CONFIG_CC_HAS_ASM_INLINE
+#define asm_inline asm __inline
+#else
+#define asm_inline asm
+#endif
+
+#ifndef __no_fgcse
+# define __no_fgcse
+#endif
+
+/* Are two types/vars the same type (ignoring qualifiers)? */
+#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
+
+/* Is this type a native word size -- useful for atomic operations */
+#define __native_word(t) \
+	(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
+	 sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
+
+/* Helpers for emitting diagnostics in pragmas. */
+#ifndef __diag
+#define __diag(string)
+#endif
+
+#ifndef __diag_GCC
+#define __diag_GCC(version, severity, string)
+#endif
+
+#define __diag_push()	__diag(push)
+#define __diag_pop()	__diag(pop)
+
+#define __diag_ignore(compiler, version, option, comment) \
+	__diag_ ## compiler(version, ignore, option)
+#define __diag_warn(compiler, version, option, comment) \
+	__diag_ ## compiler(version, warn, option)
+#define __diag_error(compiler, version, option, comment) \
+	__diag_ ## compiler(version, error, option)
+
+#endif /* __LINUX_COMPILER_TYPES_H */

lib/vsprintf.c

@@ -26,8 +26,6 @@
 #include <linux/types.h>
 #include <linux/string.h>
 
-#define noinline __attribute__((noinline))
-
 /* we use this so that we can do without the ctype library */
 #define is_digit(c)	((c) >= '0' && (c) <= '9')
 

scripts/Kconfig.include

+# Kconfig helper macros
+
+# Convenient variables
+comma       := ,
+quote       := "
+squote      := '
+empty       :=
+space       := $(empty) $(empty)
+dollar      := $
+right_paren := )
+left_paren  := (
+
+# $(if-success,<command>,<then>,<else>)
+# Return <then> if <command> exits with 0, <else> otherwise.
+if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)")
+
+# $(success,<command>)
+# Return y if <command> exits with 0, n otherwise
+success = $(if-success,$(1),y,n)
+
+# $(cc-option,<flag>)
+# Return y if the compiler supports <flag>, n otherwise
+cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
+
+# $(ld-option,<flag>)
+# Return y if the linker supports <flag>, n otherwise
+ld-option = $(success,$(LD) -v $(1))
+
+# gcc version including patch level
+gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//')