linux-kernel - [PATCH v3] tty: vt: Remove some repetitive initialization

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Message-Id: <20230802022049.1674070-1-oushixiong@kylinos.cn>
Date:   Wed,  2 Aug 2023 10:20:49 +0800
From:   oushixiong <oushixiong@...inos.cn>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Jiri Slaby <jirislaby@...nel.org>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Samuel Thibault <samuel.thibault@...-lyon.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        oushixiong <oushixiong@...inos.cn>
Subject: [PATCH v3] tty: vt: Remove some repetitive initialization

Members vc_col, vc_rows and vc_size_row of the struct vc_data have been
initialized in visual_init(), so it no longer to initialized them again
in vc_init().

Signed-off-by: oushixiong <oushixiong@...inos.cn>
---
v1->v2:
    - Fix the comment.
v2->v3:
    - Fix the comment again.

 drivers/tty/vt/vt.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 1e8e57b45688..cf77011a8f4e 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -140,8 +140,7 @@ EXPORT_SYMBOL(vc_cons);
 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
 
 static int con_open(struct tty_struct *, struct file *);
-static void vc_init(struct vc_data *vc, unsigned int rows,
-		    unsigned int cols, int do_clear);
+static void vc_init(struct vc_data *vc, int do_clear);
 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
 static void save_cur(struct vc_data *vc);
 static void reset_terminal(struct vc_data *vc, int do_clear);
@@ -1103,7 +1102,7 @@ int vc_allocate(unsigned int currcons)	/* return 0 on success */
 	if (global_cursor_default == -1)
 		global_cursor_default = 1;
 
-	vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
+	vc_init(vc, 1);
 	vcs_make_sysfs(currcons);
 	atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
 
@@ -3398,16 +3397,10 @@ module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
 
-static void vc_init(struct vc_data *vc, unsigned int rows,
-		    unsigned int cols, int do_clear)
+static void vc_init(struct vc_data *vc, int do_clear)
 {
 	int j, k ;
 
-	vc->vc_cols = cols;
-	vc->vc_rows = rows;
-	vc->vc_size_row = cols << 1;
-	vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
-
 	set_origin(vc);
 	vc->vc_pos = vc->vc_origin;
 	reset_vc(vc);
@@ -3475,8 +3468,7 @@ static int __init con_init(void)
 		visual_init(vc, currcons, 1);
 		/* Assuming vc->vc_{cols,rows,screenbuf_size} are sane here. */
 		vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
-		vc_init(vc, vc->vc_rows, vc->vc_cols,
-			currcons || !vc->vc_sw->con_save_screen);
+		vc_init(vc, currcons || !vc->vc_sw->con_save_screen);
 	}
 	currcons = fg_console = 0;
 	master_display_fg = vc = vc_cons[currcons].d;
-- 
2.25.1


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