These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / x86 / kernel / mcount_64.S

diff --git a/kernel/arch/x86/kernel/mcount_64.S b/kernel/arch/x86/kernel/mcount_64.S
index 94ea120..87e1762 100644 (file)
--- a/kernel/arch/x86/kernel/mcount_64.S
+++ b/kernel/arch/x86/kernel/mcount_64.S
@@ -278,6 +278,12 @@ trace:
        /* save_mcount_regs fills in first two parameters */
        save_mcount_regs
 
+       /*
+        * When DYNAMIC_FTRACE is not defined, ARCH_SUPPORTS_FTRACE_OPS is not
+        * set (see include/asm/ftrace.h and include/linux/ftrace.h).  Only the
+        * ip and parent ip are used and the list function is called when
+        * function tracing is enabled.
+        */
        call   *ftrace_trace_function
 
        restore_mcount_regs