diff mbox series

[RFC,v2,riscv/for-next,4/5] riscv: ftrace: do not use stop_machine to update code

Message ID 20220913094252.3555240-5-andy.chiu@sifive.com (mailing list archive)
State New, archived
Headers show
Series Enable ftrace with kernel preemption for RISC-V | expand

Commit Message

Andy Chiu Sept. 13, 2022, 9:42 a.m. UTC 
Now it is safe to remove dependency from stop_machine() to patch code in
ftrace.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Zong Li <zong.li@sifive.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 arch/riscv/kernel/ftrace.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
index 84b9e280dd1f..53db2ff83751 100644
--- a/arch/riscv/kernel/ftrace.c
+++ b/arch/riscv/kernel/ftrace.c
@@ -12,6 +12,12 @@ 
 #include <asm/patch.h>
 
 #ifdef CONFIG_DYNAMIC_FTRACE
+
+void arch_ftrace_update_code(int command)
+{
+	ftrace_modify_all_code(command);
+}
+
 void ftrace_arch_code_modify_prepare(void) __acquires(&text_mutex)
 {
 	mutex_lock(&text_mutex);