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Merge pull request #149 from net147/gcc6-fixes
linux-sunxi: fix compiling with GCC 6
This commit is contained in:
Enrico Butera
GitHub
commit
1a840570a9
@ -0,0 +1,276 @@
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From a66aaac889f09425ff0f3ddb27aca46ae02d6eea Mon Sep 17 00:00:00 2001
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From: Joe Perches <joe@perches.com>
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Date: Thu, 25 Jun 2015 15:01:02 -0700
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Subject: [PATCH] compiler-gcc: integrate the various compiler-gcc[345].h files
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As gcc major version numbers are going to advance rather rapidly in the
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future, there's no real value in separate files for each compiler
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version.
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Deduplicate some of the macros #defined in each file too.
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Neaten comments using normal kernel commenting style.
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Upstream-Status: Backport
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Signed-off-by: Joe Perches <joe@perches.com>
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Cc: Andi Kleen <andi@firstfloor.org>
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Cc: Michal Marek <mmarek@suse.cz>
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Cc: Segher Boessenkool <segher@kernel.crashing.org>
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Cc: Sasha Levin <levinsasha928@gmail.com>
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Cc: Anton Blanchard <anton@samba.org>
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Cc: Alan Modra <amodra@gmail.com>
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Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Jonathan Liu <net147@gmail.com>
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---
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include/linux/compiler-gcc.h | 120 ++++++++++++++++++++++++++++++++++++++++--
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include/linux/compiler-gcc3.h | 23 --------
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include/linux/compiler-gcc4.h | 74 --------------------------
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3 files changed, 116 insertions(+), 101 deletions(-)
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delete mode 100644 include/linux/compiler-gcc3.h
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delete mode 100644 include/linux/compiler-gcc4.h
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diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
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index 7970e31..727add9 100644
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--- a/include/linux/compiler-gcc.h
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+++ b/include/linux/compiler-gcc.h
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@@ -97,10 +97,122 @@
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#define __maybe_unused __attribute__((unused))
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#define __always_unused __attribute__((unused))
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-#define __gcc_header(x) #x
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-#define _gcc_header(x) __gcc_header(linux/compiler-gcc##x.h)
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-#define gcc_header(x) _gcc_header(x)
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-#include gcc_header(__GNUC__)
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+/* gcc version specific checks */
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+
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+#if GCC_VERSION < 30200
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+# error Sorry, your compiler is too old - please upgrade it.
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+#endif
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+
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+#if GCC_VERSION < 30300
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+# define __used __attribute__((__unused__))
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+#else
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+# define __used __attribute__((__used__))
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+#endif
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+
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+#ifdef CONFIG_GCOV_KERNEL
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+# if GCC_VERSION < 30400
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+# error "GCOV profiling support for gcc versions below 3.4 not included"
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+# endif /* __GNUC_MINOR__ */
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+#endif /* CONFIG_GCOV_KERNEL */
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+
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+#if GCC_VERSION >= 30400
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+#define __must_check __attribute__((warn_unused_result))
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+#endif
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+
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+#if GCC_VERSION >= 40000
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+
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+/* GCC 4.1.[01] miscompiles __weak */
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+#ifdef __KERNEL__
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+# if GCC_VERSION >= 40100 && GCC_VERSION <= 40101
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+# error Your version of gcc miscompiles the __weak directive
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+# endif
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+#endif
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+
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+#define __used __attribute__((__used__))
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+#define __compiler_offsetof(a, b) \
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+ __builtin_offsetof(a, b)
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+
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+#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
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+# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
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+#endif
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+
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+#if GCC_VERSION >= 40300
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+/* Mark functions as cold. gcc will assume any path leading to a call
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+ * to them will be unlikely. This means a lot of manual unlikely()s
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+ * are unnecessary now for any paths leading to the usual suspects
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+ * like BUG(), printk(), panic() etc. [but let's keep them for now for
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+ * older compilers]
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+ *
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+ * Early snapshots of gcc 4.3 don't support this and we can't detect this
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+ * in the preprocessor, but we can live with this because they're unreleased.
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+ * Maketime probing would be overkill here.
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+ *
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+ * gcc also has a __attribute__((__hot__)) to move hot functions into
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+ * a special section, but I don't see any sense in this right now in
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+ * the kernel context
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+ */
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+#define __cold __attribute__((__cold__))
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+
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+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
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+
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+#ifndef __CHECKER__
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+# define __compiletime_warning(message) __attribute__((warning(message)))
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+# define __compiletime_error(message) __attribute__((error(message)))
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+#endif /* __CHECKER__ */
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+#endif /* GCC_VERSION >= 40300 */
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+
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+#if GCC_VERSION >= 40500
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+/*
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+ * Mark a position in code as unreachable. This can be used to
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+ * suppress control flow warnings after asm blocks that transfer
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+ * control elsewhere.
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+ *
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+ * Early snapshots of gcc 4.5 don't support this and we can't detect
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+ * this in the preprocessor, but we can live with this because they're
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+ * unreleased. Really, we need to have autoconf for the kernel.
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+ */
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+#define unreachable() __builtin_unreachable()
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+
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+/* Mark a function definition as prohibited from being cloned. */
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+#define __noclone __attribute__((__noclone__))
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+
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+#endif /* GCC_VERSION >= 40500 */
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+
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+#if GCC_VERSION >= 40600
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+/*
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+ * Tell the optimizer that something else uses this function or variable.
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+ */
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+#define __visible __attribute__((externally_visible))
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+#endif
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+
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+/*
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+ * GCC 'asm goto' miscompiles certain code sequences:
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+ *
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+ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
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+ *
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+ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
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+ *
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+ * (asm goto is automatically volatile - the naming reflects this.)
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+ */
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+#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
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+
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+#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
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+#if GCC_VERSION >= 40400
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+#define __HAVE_BUILTIN_BSWAP32__
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+#define __HAVE_BUILTIN_BSWAP64__
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+#endif
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+#if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600)
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+#define __HAVE_BUILTIN_BSWAP16__
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+#endif
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+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
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+
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+#if GCC_VERSION >= 50000
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+#define KASAN_ABI_VERSION 4
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+#elif GCC_VERSION >= 40902
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+#define KASAN_ABI_VERSION 3
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+#endif
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+
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+#endif /* gcc version >= 40000 specific checks */
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#if !defined(__noclone)
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#define __noclone /* not needed */
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diff --git a/include/linux/compiler-gcc3.h b/include/linux/compiler-gcc3.h
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deleted file mode 100644
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index 37d4124..0000000
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--- a/include/linux/compiler-gcc3.h
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+++ /dev/null
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@@ -1,23 +0,0 @@
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-#ifndef __LINUX_COMPILER_H
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-#error "Please don't include <linux/compiler-gcc3.h> directly, include <linux/compiler.h> instead."
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-#endif
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-
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-#if __GNUC_MINOR__ < 2
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-# error Sorry, your compiler is too old - please upgrade it.
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-#endif
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-
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-#if __GNUC_MINOR__ >= 3
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-# define __used __attribute__((__used__))
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-#else
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-# define __used __attribute__((__unused__))
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-#endif
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-
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-#if __GNUC_MINOR__ >= 4
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-#define __must_check __attribute__((warn_unused_result))
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-#endif
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-
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-#ifdef CONFIG_GCOV_KERNEL
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-# if __GNUC_MINOR__ < 4
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-# error "GCOV profiling support for gcc versions below 3.4 not included"
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-# endif /* __GNUC_MINOR__ */
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-#endif /* CONFIG_GCOV_KERNEL */
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diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
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deleted file mode 100644
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index 91b1aa8..0000000
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--- a/include/linux/compiler-gcc4.h
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+++ /dev/null
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@@ -1,74 +0,0 @@
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-#ifndef __LINUX_COMPILER_H
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-#error "Please don't include <linux/compiler-gcc4.h> directly, include <linux/compiler.h> instead."
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-#endif
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-
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-/* GCC 4.1.[01] miscompiles __weak */
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-#ifdef __KERNEL__
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-# if __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ <= 1
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-# error Your version of gcc miscompiles the __weak directive
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-# endif
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-#endif
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-
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-#define __used __attribute__((__used__))
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-#define __must_check __attribute__((warn_unused_result))
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-#define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
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-
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-#if __GNUC_MINOR__ >= 3
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-/* Mark functions as cold. gcc will assume any path leading to a call
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- to them will be unlikely. This means a lot of manual unlikely()s
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- are unnecessary now for any paths leading to the usual suspects
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- like BUG(), printk(), panic() etc. [but let's keep them for now for
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- older compilers]
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-
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- Early snapshots of gcc 4.3 don't support this and we can't detect this
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- in the preprocessor, but we can live with this because they're unreleased.
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- Maketime probing would be overkill here.
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-
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- gcc also has a __attribute__((__hot__)) to move hot functions into
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- a special section, but I don't see any sense in this right now in
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- the kernel context */
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-#define __cold __attribute__((__cold__))
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-
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-#define __linktime_error(message) __attribute__((__error__(message)))
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-
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-/*
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- * GCC 'asm goto' miscompiles certain code sequences:
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- *
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- * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
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- *
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- * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
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- * Fixed in GCC 4.8.2 and later versions.
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- *
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- * (asm goto is automatically volatile - the naming reflects this.)
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- */
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-#if GCC_VERSION <= 40801
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-# define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
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-#else
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-# define asm_volatile_goto(x...) do { asm goto(x); } while (0)
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-#endif
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-
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-#if __GNUC_MINOR__ >= 5
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-/*
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- * Mark a position in code as unreachable. This can be used to
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- * suppress control flow warnings after asm blocks that transfer
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- * control elsewhere.
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- *
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- * Early snapshots of gcc 4.5 don't support this and we can't detect
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- * this in the preprocessor, but we can live with this because they're
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- * unreleased. Really, we need to have autoconf for the kernel.
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- */
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-#define unreachable() __builtin_unreachable()
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-
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-/* Mark a function definition as prohibited from being cloned. */
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-#define __noclone __attribute__((__noclone__))
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-
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-#endif
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-#endif
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-
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-#if __GNUC_MINOR__ > 0
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-#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
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-#endif
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-#if __GNUC_MINOR__ >= 4 && !defined(__CHECKER__)
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-#define __compiletime_warning(message) __attribute__((warning(message)))
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-#define __compiletime_error(message) __attribute__((error(message)))
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-#endif
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--
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2.10.0
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@ -1,71 +0,0 @@
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Index: git/include/linux/compiler-gcc5.h
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===================================================================
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--- git/include/linux/compiler-gcc5.h 2015-09-19 20:11:27.999423338 +0200
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+++ git/include/linux/compiler-gcc5.h 2015-09-23 10:26:05.000000000 +0200
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@@ -0,0 +1,66 @@
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+#ifndef __LINUX_COMPILER_H
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+#error "Please don't include <linux/compiler-gcc5.h> directly, include <linux/compiler.h> instead."
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+#endif
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+
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+#define __used __attribute__((__used__))
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+#define __must_check __attribute__((warn_unused_result))
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+#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
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+
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+/* Mark functions as cold. gcc will assume any path leading to a call
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+ to them will be unlikely. This means a lot of manual unlikely()s
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+ are unnecessary now for any paths leading to the usual suspects
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+ like BUG(), printk(), panic() etc. [but let's keep them for now for
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+ older compilers]
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+
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+ Early snapshots of gcc 4.3 don't support this and we can't detect this
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+ in the preprocessor, but we can live with this because they're unreleased.
|
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+ Maketime probing would be overkill here.
|
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+
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+ gcc also has a __attribute__((__hot__)) to move hot functions into
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+ a special section, but I don't see any sense in this right now in
|
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+ the kernel context */
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+#define __cold __attribute__((__cold__))
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+
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+#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
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+
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+#ifndef __CHECKER__
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+# define __compiletime_warning(message) __attribute__((warning(message)))
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+# define __compiletime_error(message) __attribute__((error(message)))
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+#endif /* __CHECKER__ */
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+
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+/*
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+ * Mark a position in code as unreachable. This can be used to
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+ * suppress control flow warnings after asm blocks that transfer
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+ * control elsewhere.
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+ *
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+ * Early snapshots of gcc 4.5 don't support this and we can't detect
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+ * this in the preprocessor, but we can live with this because they're
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+ * unreleased. Really, we need to have autoconf for the kernel.
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+ */
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+#define unreachable() __builtin_unreachable()
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+
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+/* Mark a function definition as prohibited from being cloned. */
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+#define __noclone __attribute__((__noclone__))
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+
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+/*
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+ * Tell the optimizer that something else uses this function or variable.
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+ */
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+#define __visible __attribute__((externally_visible))
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+
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+/*
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+ * GCC 'asm goto' miscompiles certain code sequences:
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+ *
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+ * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
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+ *
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+ * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
|
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+ * Fixed in GCC 4.8.2 and later versions.
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+ *
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+ * (asm goto is automatically volatile - the naming reflects this.)
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+ */
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+#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
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+
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+#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
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+#define __HAVE_BUILTIN_BSWAP32__
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+#define __HAVE_BUILTIN_BSWAP64__
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+#define __HAVE_BUILTIN_BSWAP16__
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+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
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@ -12,7 +12,7 @@ SRCREV_pn-${PN} = "d47d367036be38c5180632ec8a3ad169a4593a88"
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MACHINE_KERNEL_PR_append = "a"
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SRC_URI += "git://github.com/linux-sunxi/linux-sunxi.git;branch=sunxi-3.4;protocol=git \
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file://0001-compiler-gcc5.patch \
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file://0001-compiler-gcc-integrate-the-various-compiler-gcc-345-.patch \
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file://0002-use-static-inline-in-ARM-ftrace.patch \
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file://0001-gcc5-fixes.patch \
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file://defconfig \
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