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authorJiri Slaby <jslaby@suse.cz>2016-10-03 11:18:33 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-10-27 16:37:43 +0200
commitd705ff38189fcfbbfa6aa97363d30c23348ad166 (patch)
tree48b1720feab3c44d79b2d4cdfdc13c82941c1f2e /drivers/tty/vt
parentde48b0999df44b5d2ab75500a48aedff5a36f0e6 (diff)
tty: vt, cleanup and document con_scroll
Scrolling helpers scrup and scrdown both accept 'top' and 'bottom' as unsigned int. Number of lines 'nr' is accepted as int, but all callers pass down unsigned too. So change the type of 'nr' to unsigned too. Now, promote unsigned int from the helpers up to the con_scroll hook which actually accepted all those as signed int. Next, the 'dir' parameter can have only two values and we define constants for that: SM_UP and SM_DOWN. Switch them to enum and do proper type checking on 'dir' too. Finally, document the behaviour of the hook. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Thomas Winischhofer <thomas@winischhofer.net> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: <linux-fbdev@vger.kernel.org> Cc: <linux-usb@vger.kernel.org> Cc: <linux-parisc@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt')
-rw-r--r--drivers/tty/vt/vt.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 06fb39c1d6dd..c4bf96fee32e 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -315,7 +315,8 @@ void schedule_console_callback(void)
schedule_work(&console_work);
}
-static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
+static void scrup(struct vc_data *vc, unsigned int t, unsigned int b,
+ unsigned int nr)
{
unsigned short *d, *s;
@@ -332,7 +333,8 @@ static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
vc->vc_size_row * nr);
}
-static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
+static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b,
+ unsigned int nr)
{
unsigned short *s;
unsigned int step;