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authorDenis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>2021-08-23 19:19:53 +0200
committerDenis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>2021-08-26 04:05:20 +0200
commitf2615ab5380d449ed5c4fa677a4929043d41b97b (patch)
tree88bc92b64aab4413857bb77f2bb25aac99107e12
parent211965ba41f1771e441d80d238334b9b35444049 (diff)
downloadkernel_samsung_tuna-replicant-6.0.tar.gz
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kernel_samsung_tuna-replicant-6.0.zip
Add support for gcc6HEADreplicant-6.0
Without that fix, when building Replicant 6.0 on Trisquel 9 (etiona) we have the following build error: Using [...]/kernel/samsung/smdk4412 as source for kernel CHK include/generated/utsrelease.h make[3]: 'include/generated/mach-types.h' is up to date. CC kernel/bounds.s In file included from [...]/kernel/samsung/smdk4412/include/linux/compiler.h:48:0, from [...]/kernel/samsung/smdk4412/include/linux/stddef.h:4, from [...]/kernel/samsung/smdk4412/include/linux/posix_types.h:4, from [...]/kernel/samsung/smdk4412/include/linux/types.h:17, from [...]/kernel/samsung/smdk4412/include/linux/page-flags.h:8, from [...]/kernel/samsung/smdk4412/kernel/bounds.c:9: [...]/kernel/samsung/smdk4412/include/linux/compiler-gcc.h:99:30: fatal error: linux/compiler-gcc6.h: No such file or directory #include gcc_header(__GNUC__) ^ Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
-rw-r--r--include/linux/compiler-gcc6.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc6.h b/include/linux/compiler-gcc6.h
new file mode 100644
index 00000000000..a3d00d8d316
--- /dev/null
+++ b/include/linux/compiler-gcc6.h
@@ -0,0 +1,66 @@
+#ifndef __LINUX_COMPILER_H
+#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead."
+#endif
+
+#define __used __attribute__((__used__))
+#define __must_check __attribute__((warn_unused_result))
+#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
+
+/* 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__ */
+
+/*
+ * 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__))
+
+/*
+ * Tell the optimizer that something else uses this function or variable.
+ */
+#define __visible __attribute__((externally_visible))
+
+/*
+ * 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.
+ * Fixed in GCC 4.8.2 and later versions.
+ *
+ * (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
+#define __HAVE_BUILTIN_BSWAP32__
+#define __HAVE_BUILTIN_BSWAP64__
+#define __HAVE_BUILTIN_BSWAP16__
+#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */