--- /dev/null
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Sat, 7 Feb 2015 21:52:40 +0000 (+0100)
+Subject: Add linux/compiler-gcc6.h to fix builds with gcc6
+X-Git-Tag: v2015.04-rc2~31
+X-Git-Url: http://git.denx.de/?p=u-boot.git;a=commitdiff_plain;h=478b02f1a7043b673565075ea5016376f3293b23
+
+Add linux/compiler-gcc6.h to fix builds with gcc6
+
+Add linux/compiler-gcc6/h from the kernel sources at:
+
+commit 5631b8fba640a4ab2f8a954f63a603fa34eda96b
+Author: Steven Noonan <steven@uplinklabs.net>
+Date: Sat Oct 25 15:09:42 2014 -0700
+
+ compiler/gcc4+: Remove inaccurate comment about 'asm goto' miscompiles
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+
+--- /dev/null
++++ b/include/linux/compiler-gcc6.h
+@@ -0,0 +1,284 @@
++#ifndef __LINUX_COMPILER_H
++#error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
++#endif
++
++/*
++ * Common definitions for all gcc versions go here.
++ */
++#define GCC_VERSION (__GNUC__ * 10000 \
++ + __GNUC_MINOR__ * 100 \
++ + __GNUC_PATCHLEVEL__)
++
++/* Optimization barrier */
++
++/* The "volatile" is due to gcc bugs */
++#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
++ * normal barrier(): while gcc behavior gets along with a normal
++ * barrier(), llvm needs an explicit input variable to be assumed
++ * 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
++ * 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")
++
++/*
++ * This macro obfuscates arithmetic on a variable address so that gcc
++ * shouldn't recognize the original var, and make assumptions about it.
++ *
++ * This is needed because the C standard makes it undefined to do
++ * pointer arithmetic on "objects" outside their boundaries and the
++ * gcc optimizers assume this is the case. In particular they
++ * assume such arithmetic does not wrap.
++ *
++ * A miscompilation has been observed because of this on PPC.
++ * To work around it we hide the relationship of the pointer and the object
++ * using this macro.
++ *
++ * Versions of the ppc64 compiler before 4.1 had a bug where use of
++ * RELOC_HIDE could trash r30. The bug can be worked around by changing
++ * the inline assembly constraint from =g to =r, in this particular
++ * case either is valid.
++ */
++#define RELOC_HIDE(ptr, off) \
++({ \
++ unsigned long __ptr; \
++ __asm__ ("" : "=r"(__ptr) : "0"(ptr)); \
++ (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.
++ * [...]
++ */
++#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 */
++
++#if GCC_VERSION >= 30400
++#define __must_check __attribute__((warn_unused_result))
++#define __malloc __attribute__((__malloc__))
++#endif
++
++#if GCC_VERSION >= 40000
++
++/* 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 __used __attribute__((__used__))
++#define __compiler_offsetof(a, b) \
++ __builtin_offsetof(a, b)
++
++#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
++# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
++#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.
++ *
++ * 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
++ */
++#define __cold __attribute__((__cold__))
++
++#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
++
++#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__, __optimize__("no-tracer")))
++
++#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
++
++
++#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__)))
++#endif
++
++/*
++ * GCC 'asm goto' miscompiles certain code sequences:
++ *
++ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
++ *
++ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
++ *
++ * (asm goto is automatically volatile - the naming reflects this.)
++ */
++#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
++
++#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
++#if GCC_VERSION >= 40400
++#define __HAVE_BUILTIN_BSWAP32__
++#define __HAVE_BUILTIN_BSWAP64__
++#endif
++#if GCC_VERSION >= 40800
++#define __HAVE_BUILTIN_BSWAP16__
++#endif
++#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
++
++#if 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
++ */
++#define __no_sanitize_address __attribute__((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
++#endif
++
++/*
++ * A trick to suppress uninitialized variable warning without generating any
++ * code
++ */
++#define uninitialized_var(x) x = x
--- /dev/null
+--- /dev/null
++++ b/include/linux/compiler-gcc7.h
+@@ -0,0 +1,284 @@
++#ifndef __LINUX_COMPILER_H
++#error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
++#endif
++
++/*
++ * Common definitions for all gcc versions go here.
++ */
++#define GCC_VERSION (__GNUC__ * 10000 \
++ + __GNUC_MINOR__ * 100 \
++ + __GNUC_PATCHLEVEL__)
++
++/* Optimization barrier */
++
++/* The "volatile" is due to gcc bugs */
++#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
++ * normal barrier(): while gcc behavior gets along with a normal
++ * barrier(), llvm needs an explicit input variable to be assumed
++ * 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
++ * 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")
++
++/*
++ * This macro obfuscates arithmetic on a variable address so that gcc
++ * shouldn't recognize the original var, and make assumptions about it.
++ *
++ * This is needed because the C standard makes it undefined to do
++ * pointer arithmetic on "objects" outside their boundaries and the
++ * gcc optimizers assume this is the case. In particular they
++ * assume such arithmetic does not wrap.
++ *
++ * A miscompilation has been observed because of this on PPC.
++ * To work around it we hide the relationship of the pointer and the object
++ * using this macro.
++ *
++ * Versions of the ppc64 compiler before 4.1 had a bug where use of
++ * RELOC_HIDE could trash r30. The bug can be worked around by changing
++ * the inline assembly constraint from =g to =r, in this particular
++ * case either is valid.
++ */
++#define RELOC_HIDE(ptr, off) \
++({ \
++ unsigned long __ptr; \
++ __asm__ ("" : "=r"(__ptr) : "0"(ptr)); \
++ (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.
++ * [...]
++ */
++#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 */
++
++#if GCC_VERSION >= 30400
++#define __must_check __attribute__((warn_unused_result))
++#define __malloc __attribute__((__malloc__))
++#endif
++
++#if GCC_VERSION >= 40000
++
++/* 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 __used __attribute__((__used__))
++#define __compiler_offsetof(a, b) \
++ __builtin_offsetof(a, b)
++
++#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
++# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
++#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.
++ *
++ * 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
++ */
++#define __cold __attribute__((__cold__))
++
++#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
++
++#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__, __optimize__("no-tracer")))
++
++#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
++
++
++#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__)))
++#endif
++
++/*
++ * GCC 'asm goto' miscompiles certain code sequences:
++ *
++ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
++ *
++ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
++ *
++ * (asm goto is automatically volatile - the naming reflects this.)
++ */
++#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
++
++#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
++#if GCC_VERSION >= 40400
++#define __HAVE_BUILTIN_BSWAP32__
++#define __HAVE_BUILTIN_BSWAP64__
++#endif
++#if GCC_VERSION >= 40800
++#define __HAVE_BUILTIN_BSWAP16__
++#endif
++#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
++
++#if 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
++ */
++#define __no_sanitize_address __attribute__((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
++#endif
++
++/*
++ * A trick to suppress uninitialized variable warning without generating any
++ * code
++ */
++#define uninitialized_var(x) x = x
projects / openwrt / staging / jogo.git / commitdiff