Merge branch 'x86/um-header' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86/um-header' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits)
  x86: canonicalize remaining header guards
  x86: drop double underscores from header guards
  x86: Fix ASM_X86__ header guards
  x86, um: get rid of uml-config.h
  x86, um: get rid of arch/um/Kconfig.arch
  x86, um: get rid of arch/um/os symlink
  x86, um: get rid of excessive includes of uml-config.h
  x86, um: get rid of header symlinks
  x86, um: merge Kconfig.i386 and Kconfig.x86_64
  x86, um: get rid of sysdep symlink
  x86, um: trim the junk from uml ptrace-*.h
  x86, um: take vm-flags.h to sysdep
  x86, um: get rid of uml asm/arch
  x86, um: get rid of uml highmem.h
  x86, um: get rid of uml unistd.h
  x86, um: get rid of system.h -> system.h include
  x86, um: uml atomic.h is not needed anymore
  x86, um: untangle uml ldt.h
  x86, um: get rid of more uml asm/arch uses
  x86, um: remove dead header (uml module-generic.h; never used these days)
  ...

1 files changed, 60 insertions, 0 deletions

diff --git a/arch/x86/include/asm/string_64.h b/arch/x86/include/asm/string_64.h
new file mode 100644
index 000000000000..2afe164bf1e6
--- /dev/null
+++ b/arch/x86/include/asm/string_64.h
@@ -0,0 +1,60 @@
+#ifndef _ASM_X86_STRING_64_H
+#define _ASM_X86_STRING_64_H
+
+#ifdef __KERNEL__
+
+/* Written 2002 by Andi Kleen */
+
+/* Only used for special circumstances. Stolen from i386/string.h */
+static __always_inline void *__inline_memcpy(void *to, const void *from, size_t n)
+{
+	unsigned long d0, d1, d2;
+	asm volatile("rep ; movsl\n\t"
+		     "testb $2,%b4\n\t"
+		     "je 1f\n\t"
+		     "movsw\n"
+		     "1:\ttestb $1,%b4\n\t"
+		     "je 2f\n\t"
+		     "movsb\n"
+		     "2:"
+		     : "=&c" (d0), "=&D" (d1), "=&S" (d2)
+		     : "0" (n / 4), "q" (n), "1" ((long)to), "2" ((long)from)
+		     : "memory");
+	return to;
+}
+
+/* Even with __builtin_ the compiler may decide to use the out of line
+   function. */
+
+#define __HAVE_ARCH_MEMCPY 1
+#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
+extern void *memcpy(void *to, const void *from, size_t len);
+#else
+extern void *__memcpy(void *to, const void *from, size_t len);
+#define memcpy(dst, src, len)					\
+({								\
+	size_t __len = (len);					\
+	void *__ret;						\
+	if (__builtin_constant_p(len) && __len >= 64)		\
+		__ret = __memcpy((dst), (src), __len);		\
+	else							\
+		__ret = __builtin_memcpy((dst), (src), __len);	\
+	__ret;							\
+})
+#endif
+
+#define __HAVE_ARCH_MEMSET
+void *memset(void *s, int c, size_t n);
+
+#define __HAVE_ARCH_MEMMOVE
+void *memmove(void *dest, const void *src, size_t count);
+
+int memcmp(const void *cs, const void *ct, size_t count);
+size_t strlen(const char *s);
+char *strcpy(char *dest, const char *src);
+char *strcat(char *dest, const char *src);
+int strcmp(const char *cs, const char *ct);
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_X86_STRING_64_H */