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[2003:dc:6f49:a600:529a:4cff:fe3d:d983]) by smtp.gmail.com with ESMTPSA id d9-20020adff2c9000000b00324887a13f7sm10199828wrp.0.2023.10.09.09.57.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Oct 2023 09:57:54 -0700 (PDT) From: Max Kellermann To: Greg Kroah-Hartman , Jiri Slaby Cc: Max Kellermann , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH 5/7] drivers/tty/serial_core: add local variable for newly allocated attribute_group** Date: Mon, 9 Oct 2023 18:57:38 +0200 Message-Id: <20231009165741.746184-5-max.kellermann@ionos.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231009165741.746184-1-max.kellermann@ionos.com> References: <20231009165741.746184-1-max.kellermann@ionos.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This allows the compiler to keep the pointer in a register and prepares for making the struct field "const". Signed-off-by: Max Kellermann --- drivers/tty/serial/serial_core.c | 11 ++++++----- include/linux/serial_core.h | 4 ++-- 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 7bdc21d5e13b..e253ef474fb4 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3082,6 +3082,7 @@ static int serial_core_add_one_port(struct uart_driver *drv, struct uart_port *u struct uart_state *state; struct tty_port *port; int ret = 0; + const struct attribute_group **tty_groups; struct device *tty_dev; int num_groups; @@ -3132,22 +3133,22 @@ static int serial_core_add_one_port(struct uart_driver *drv, struct uart_port *u if (uport->attr_group) num_groups++; - uport->tty_groups = kcalloc(num_groups, sizeof(*uport->tty_groups), + uport->tty_groups = tty_groups = kcalloc(num_groups, sizeof(*tty_groups), GFP_KERNEL); - if (!uport->tty_groups) { + if (!tty_groups) { ret = -ENOMEM; goto out; } - uport->tty_groups[0] = &tty_dev_attr_group; + tty_groups[0] = &tty_dev_attr_group; if (uport->attr_group) - uport->tty_groups[1] = uport->attr_group; + tty_groups[1] = uport->attr_group; /* * Register the port whether it's detected or not. This allows * setserial to be used to alter this port's parameters. */ tty_dev = tty_port_register_device_attr_serdev(port, drv->tty_driver, - uport->line, uport->dev, port, uport->tty_groups); + uport->line, uport->dev, port, tty_groups); if (!IS_ERR(tty_dev)) { device_set_wakeup_capable(tty_dev, 1); } else { diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index bb6f073bc159..597de109dbf5 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -578,8 +578,8 @@ struct uart_port { unsigned char suspended; unsigned char console_reinit; const char *name; /* port name */ - struct attribute_group *attr_group; /* port specific attributes */ - const struct attribute_group **tty_groups; /* all attributes (serial core use only) */ + const struct attribute_group *attr_group; /* port specific attributes */ + const struct attribute_group *const*tty_groups; /* all attributes (serial core use only) */ struct serial_rs485 rs485; struct serial_rs485 rs485_supported; /* Supported mask for serial_rs485 */ struct gpio_desc *rs485_term_gpio; /* enable RS485 bus termination */ -- 2.39.2