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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-05 15:32:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-05 15:32:03 -0800
commitef26b1691d11e17af205a4ff9c91458d931d11db (patch)
tree5db199f404ca18f6c9e8617b684e9165ca365e30 /include/linux
parenta77d2e081bbbccb38f42da45500dd089756efdfb (diff)
parent7cff7ce94a7df2ccf5ac76b48ee0995fee2060df (diff)
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: include/linux/compiler-gcc4.h: Fix build bug - gcc-4.0.2 doesn't understand __builtin_object_size x86/alternatives: No need for alternatives-asm.h to re-invent stuff already in asm.h x86/alternatives: Check replacementlen <= instrlen at build time x86, 64-bit: Set data segments to null after switching to 64-bit mode x86: Clean up the loadsegment() macro x86: Optimize loadsegment() x86: Add missing might_fault() checks to copy_{to,from}_user() x86-64: __copy_from_user_inatomic() adjustments x86: Remove unused thread_return label from switch_to() x86, 64-bit: Fix bstep_iret jump x86: Don't use the strict copy checks when branch profiling is in use x86, 64-bit: Move K8 B step iret fixup to fault entry asm x86: Generate cmpxchg build failures x86: Add a Kconfig option to turn the copy_from_user warnings into errors x86: Turn the copy_from_user check into an (optional) compile time warning x86: Use __builtin_memset and __builtin_memcpy for memset/memcpy x86: Use __builtin_object_size() to validate the buffer size for copy_from_user()
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/compiler-gcc4.h8
-rw-r--r--include/linux/compiler.h11
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index ab3af40a53c6..94dea3ffbfa1 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -51,3 +51,11 @@
#endif
#endif
+
+#if __GNUC_MINOR__ > 0
+#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
+#endif
+#if __GNUC_MINOR__ >= 4
+#define __compiletime_warning(message) __attribute__((warning(message)))
+#define __compiletime_error(message) __attribute__((error(message)))
+#endif
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index acbd654cc850..5be3dab4a695 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -275,6 +275,17 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
#endif
+/* Compile time object size, -1 for unknown */
+#ifndef __compiletime_object_size
+# define __compiletime_object_size(obj) -1
+#endif
+#ifndef __compiletime_warning
+# define __compiletime_warning(message)
+#endif
+#ifndef __compiletime_error
+# define __compiletime_error(message)
+#endif
+
/*
* Prevent the compiler from merging or refetching accesses. The compiler
* is also forbidden from reordering successive instances of ACCESS_ONCE(),