2 files changed, 25 insertions, 3 deletions

diff --git a/include/asm-x86/linkage.h b/include/asm-x86/linkage.h
index 31739c7d66a9..d605eeba0f70 100644
--- a/include/asm-x86/linkage.h
+++ b/include/asm-x86/linkage.h
@@ -8,12 +8,34 @@
 
 #ifdef CONFIG_X86_32
 #define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
-#define prevent_tail_call(ret) __asm__ ("" : "=r" (ret) : "0" (ret))
 /*
  * For 32-bit UML - mark functions implemented in assembly that use
  * regparm input parameters:
  */
 #define asmregparm __attribute__((regparm(3)))
+
+#define asmlinkage_protect(n, ret, args...) \
+        __asmlinkage_protect##n(ret, ##args)
+#define __asmlinkage_protect_n(ret, args...) \
+        __asm__ __volatile__ ("" : "=r" (ret) : "0" (ret), ##args)
+#define __asmlinkage_protect0(ret) \
+        __asmlinkage_protect_n(ret)
+#define __asmlinkage_protect1(ret, arg1) \
+        __asmlinkage_protect_n(ret, "g" (arg1))
+#define __asmlinkage_protect2(ret, arg1, arg2) \
+        __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2))
+#define __asmlinkage_protect3(ret, arg1, arg2, arg3) \
+        __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3))
+#define __asmlinkage_protect4(ret, arg1, arg2, arg3, arg4) \
+        __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
+                              "g" (arg4))
+#define __asmlinkage_protect5(ret, arg1, arg2, arg3, arg4, arg5) \
+        __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
+                              "g" (arg4), "g" (arg5))
+#define __asmlinkage_protect6(ret, arg1, arg2, arg3, arg4, arg5, arg6) \
+        __asmlinkage_protect_n(ret, "g" (arg1), "g" (arg2), "g" (arg3), \
+                              "g" (arg4), "g" (arg5), "g" (arg6))
+
 #endif
 
 #ifdef CONFIG_X86_ALIGNMENT_16
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index 0592936344c4..fe2a39c489b6 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -17,8 +17,8 @@
 # define asmregparm
 #endif
 
-#ifndef prevent_tail_call
-# define prevent_tail_call(ret) do { } while (0)
+#ifndef asmlinkage_protect
+# define asmlinkage_protect(n, ret, args...)    do { } while (0)
 #endif
 
 #ifndef __ALIGN