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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/x86/include/asm/string_64.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/x86/include/asm/string_64.h')
-rw-r--r--kernel/arch/x86/include/asm/string_64.h84
1 files changed, 84 insertions, 0 deletions
diff --git a/kernel/arch/x86/include/asm/string_64.h b/kernel/arch/x86/include/asm/string_64.h
new file mode 100644
index 000000000..e46611969
--- /dev/null
+++ b/kernel/arch/x86/include/asm/string_64.h
@@ -0,0 +1,84 @@
+#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
+extern void *__memcpy(void *to, const void *from, size_t len);
+
+#ifndef CONFIG_KMEMCHECK
+#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
+extern void *memcpy(void *to, const void *from, size_t len);
+#else
+#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
+#else
+/*
+ * kmemcheck becomes very happy if we use the REP instructions unconditionally,
+ * because it means that we know both memory operands in advance.
+ */
+#define memcpy(dst, src, len) __inline_memcpy((dst), (src), (len))
+#endif
+
+#define __HAVE_ARCH_MEMSET
+void *memset(void *s, int c, size_t n);
+void *__memset(void *s, int c, size_t n);
+
+#define __HAVE_ARCH_MEMMOVE
+void *memmove(void *dest, const void *src, size_t count);
+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);
+
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
+
+/*
+ * For files that not instrumented (e.g. mm/slub.c) we
+ * should use not instrumented version of mem* functions.
+ */
+
+#undef memcpy
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#define memmove(dst, src, len) __memmove(dst, src, len)
+#define memset(s, c, n) __memset(s, c, n)
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_X86_STRING_64_H */