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-rw-r--r--include/linux/ptrace.h10
1 files changed, 10 insertions, 0 deletions
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__.
*