microblaze: ftrace: Pass the first calling instruction for dynamic ftrace

Selftest for dynamic ftrace requres to pass address of the first
calling instruction because hash function is calculated from it.

ftrace_update_ftrace_func setups pointer to function which is called
in _mcount function. trace_selftest is not aware about instruction
size (for microblaze 8 - imm and addik) and that's why we have
to pass in r5 address of imm not addik which is in r15.12

For more info look at ftrace_ops_list_func/ftrace.c.

Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/microblaze/kernel/mcount.S b/arch/microblaze/kernel/mcount.S
index e7eaa7a8cbd3..fc1e1322ce4c 100644
--- a/arch/microblaze/kernel/mcount.S
+++ b/arch/microblaze/kernel/mcount.S
@@ -138,7 +138,7 @@ NOALIGN_ENTRY(ftrace_call)
 #endif /* CONFIG_DYNAMIC_FTRACE */
 /* static normal trace */
         lwi     r6, r1, 120; /* MS: load parent addr */
-        addik   r5, r15, 0; /* MS: load current function addr */
+        addik   r5, r15, -4; /* MS: load current function addr */
         /* MS: here is dependency on previous code */
         brald   r15, r20; /* MS: jump to ftrace handler */
         nop;