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Diffstat (limited to 'arch/microblaze/kernel/ftrace.c')
-rw-r--r--arch/microblaze/kernel/ftrace.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/microblaze/kernel/ftrace.c b/arch/microblaze/kernel/ftrace.c
index 515feb404555..357d56abe24a 100644
--- a/arch/microblaze/kernel/ftrace.c
+++ b/arch/microblaze/kernel/ftrace.c
@@ -51,6 +51,9 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
: "r" (parent), "r" (return_hooker)
);
+ flush_dcache_range((u32)parent, (u32)parent + 4);
+ flush_icache_range((u32)parent, (u32)parent + 4);
+
if (unlikely(faulted)) {
ftrace_graph_stop();
WARN_ON(1);
@@ -95,6 +98,9 @@ static int ftrace_modify_code(unsigned long addr, unsigned int value)
if (unlikely(faulted))
return -EFAULT;
+ flush_dcache_range(addr, addr + 4);
+ flush_icache_range(addr, addr + 4);
+
return 0;
}
@@ -195,8 +201,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
ret += ftrace_modify_code((unsigned long)&ftrace_caller,
MICROBLAZE_NOP);
- /* All changes are done - lets do caches consistent */
- flush_icache();
return ret;
}
@@ -210,7 +214,6 @@ int ftrace_enable_ftrace_graph_caller(void)
old_jump = *(unsigned int *)ip; /* save jump over instruction */
ret = ftrace_modify_code(ip, MICROBLAZE_NOP);
- flush_icache();
pr_debug("%s: Replace instruction: 0x%x\n", __func__, old_jump);
return ret;
@@ -222,7 +225,6 @@ int ftrace_disable_ftrace_graph_caller(void)
unsigned long ip = (unsigned long)(&ftrace_call_graph);
ret = ftrace_modify_code(ip, old_jump);
- flush_icache();
pr_debug("%s\n", __func__);
return ret;