The kgdbts_option_setup() function is invoked only once early in boot
via the __setup("kgdbts=", ...) mechanism to parse the kernel
command-line option.After init is complete, it is never called again.

Annotating it with __init places the function in the .init.text section,
enabling the kernel to free its code memory during the init memory
cleanup phase (free_initmem()). This reduces the kernel’s runtime
memory footprint with no functional side effects.

Signed-off-by: Can Peng <pengcan@kylinos.cn>
---
 drivers/misc/kgdbts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c
index 0cf31164b470..4a7022e263ed 100644
--- a/drivers/misc/kgdbts.c
+++ b/drivers/misc/kgdbts.c
@@ -1066,7 +1066,7 @@ static void kgdbts_run_tests(void)
 	configured = 0;
 }
 
-static int kgdbts_option_setup(char *opt)
+static int __init kgdbts_option_setup(char *opt)
 {
 	if (strlen(opt) >= MAX_CONFIG_LEN) {
 		printk(KERN_ERR "kgdbts: config string too long\n");
-- 
2.25.1