[PATCH] NFC: nci: uart: Constify struct tty_ldisc_ops
Christophe JAILLET <[email protected]> Sun, 10 May 2026 22:12:52 +0200
| Newsgroups | dev.linux.lists.oe-linux-nfc,org.kernel.vger.kernel-janitors,org.kernel.vger.linux-kernel,org.kernel.vger.netdev |
|---|---|
| Message-ID | <c756755a72cdfde2877a18ddee01eaa4f633c220.1778443960.git.christophe.jaillet@wanadoo.fr> |
'struct tty_ldisc_ops' is not modified in this driver. Constifying this structure moves some data to a read-only section, so increases overall security, especially when the structure holds some function pointers. On a x86_64, with allmodconfig: Before: ====== text data bss dec hex filename 11454 3352 256 15062 3ad6 net/nfc/nci/uart.o After: ===== text data bss dec hex filename 11646 3160 256 15062 3ad6 net/nfc/nci/uart.o Signed-off-by: Christophe JAILLET <[email protected]> --- Compile tested only. --- net/nfc/nci/uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/nfc/nci/uart.c b/net/nfc/nci/uart.c index 5a3aed7f84f5..aa20e8603f32 100644 --- a/net/nfc/nci/uart.c +++ b/net/nfc/nci/uart.c @@ -421,7 +421,7 @@ void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl) } EXPORT_SYMBOL_GPL(nci_uart_set_config); -static struct tty_ldisc_ops nci_uart_ldisc = { +static const struct tty_ldisc_ops nci_uart_ldisc = { .owner = THIS_MODULE, .num = N_NCI, .name = "n_nci", -- 2.54.0