configs/telit_evk_pro3: add support for gcc 5
Use two official kernel patches to add support for gcc 5: commit 71458cfc782eafe4b27656e078d379a34e472adf kernel: add support for gcc 5 commit aeea3592a13bf12861943e44fc48f1f270941f8d ARM: 8158/1: LLVMLinux: use static inline in ARM ftrace.h Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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From 71458cfc782eafe4b27656e078d379a34e472adf Mon Sep 17 00:00:00 2001
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From: Sasha Levin <sasha.levin@oracle.com>
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Date: Mon, 13 Oct 2014 15:51:05 -0700
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Subject: [PATCH] kernel: add support for gcc 5
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We're missing include/linux/compiler-gcc5.h which is required now
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because gcc branched off to v5 in trunk.
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Just copy the relevant bits out of include/linux/compiler-gcc4.h,
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no new code is added as of now.
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This fixes a build error when using gcc 5.
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Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
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Cc: <stable@vger.kernel.org>
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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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---
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include/linux/compiler-gcc5.h | 66 +++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 66 insertions(+)
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create mode 100644 include/linux/compiler-gcc5.h
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diff --git a/include/linux/compiler-gcc5.h b/include/linux/compiler-gcc5.h
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new file mode 100644
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index 000000000000..cdd1cc202d51
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--- /dev/null
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+++ b/include/linux/compiler-gcc5.h
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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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--
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2.12.2
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@ -0,0 +1,52 @@
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From aeea3592a13bf12861943e44fc48f1f270941f8d Mon Sep 17 00:00:00 2001
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From: Behan Webster <behanw@converseincode.com>
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Date: Wed, 24 Sep 2014 01:06:46 +0100
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Subject: [PATCH] ARM: 8158/1: LLVMLinux: use static inline in ARM ftrace.h
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With compilers which follow the C99 standard (like modern versions of gcc and
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clang), "extern inline" does the wrong thing (emits code for an externally
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linkable version of the inline function). In this case using static inline
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and removing the NULL version of return_address in return_address.c does
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the right thing.
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Signed-off-by: Behan Webster <behanw@converseincode.com>
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Reviewed-by: Mark Charlebois <charlebm@gmail.com>
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Acked-by: Steven Rostedt <rostedt@goodmis.org>
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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---
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arch/arm/include/asm/ftrace.h | 2 +-
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arch/arm/kernel/return_address.c | 5 -----
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2 files changed, 1 insertion(+), 6 deletions(-)
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diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
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index 39eb16b0066f..bfe2a2f5a644 100644
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--- a/arch/arm/include/asm/ftrace.h
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+++ b/arch/arm/include/asm/ftrace.h
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@@ -45,7 +45,7 @@ void *return_address(unsigned int);
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#else
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-extern inline void *return_address(unsigned int level)
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+static inline void *return_address(unsigned int level)
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{
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return NULL;
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}
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diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
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index fafedd86885d..f6aa84d5b93c 100644
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--- a/arch/arm/kernel/return_address.c
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+++ b/arch/arm/kernel/return_address.c
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@@ -63,11 +63,6 @@ void *return_address(unsigned int level)
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#warning "TODO: return_address should use unwind tables"
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#endif
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-void *return_address(unsigned int level)
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-{
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- return NULL;
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-}
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-
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#endif /* if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) / else */
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EXPORT_SYMBOL_GPL(return_address);
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--
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2.12.2
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