X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Flinux%2Fptrace.h;h=c2f1f6a5fcb8a67f52c90c8397c7384534d3010a;hb=eaed435a7b870a38d89dbdb535c7842d618d3214;hp=a27e56ca41a4cf2ae505e08710c88f745f476510;hpb=f9156c7288e2d11501ded4d7fe6d9a3a41ee4057;p=firefly-linux-kernel-4.4.55.git

diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index a27e56ca41a4..c2f1f6a5fcb8 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -112,6 +112,7 @@
 
 #include <linux/compiler.h>		/* For unlikely.  */
 #include <linux/sched.h>		/* For struct task_struct.  */
+#include <linux/err.h>			/* for IS_ERR_VALUE */
 
 
 extern long arch_ptrace(struct task_struct *child, long request,
@@ -266,6 +267,15 @@ static inline void ptrace_release_task(struct task_struct *task)
 #define force_successful_syscall_return() do { } while (0)
 #endif
 
+#ifndef is_syscall_success
+/*
+ * On most systems we can tell if a syscall is a success based on if the retval
+ * is an error value.  On some systems like ia64 and powerpc they have different
+ * indicators of success/failure and must define their own.
+ */
+#define is_syscall_success(regs) (!IS_ERR_VALUE((unsigned long)(regs_return_value(regs))))
+#endif
+
 /*
  * <asm/ptrace.h> should define the following things inside #ifdef __KERNEL__.
  *