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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-20 15:55:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-20 15:55:17 -0700
commite11c675ede0d42a405ae595528bf0b29ce1ae56f (patch)
treee0ec481e66e4a4b70289d78992b209639a582c0c /kernel
parent467f9957d9283be40101d7255d06fae7e211ff4c (diff)
parent7bd032dc2793afcbaf4a350056768da84cdbd89b (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (79 commits) USB serial: update the console driver usb-serial: straighten out serial_open usb-serial: add missing tests and debug lines usb-serial: rename subroutines usb-serial: fix termios initialization logic usb-serial: acquire references when a new tty is installed usb-serial: change logic of serial lookups usb-serial: put subroutines in logical order usb-serial: change referencing of port and serial structures tty: Char: mxser, use THRE for ASPP_OQUEUE ioctl tty: Char: mxser, add support for CP112UL uartlite: support shared interrupt lines tty: USB: serial/mct_u232, fix tty refcnt tty: riscom8, fix tty refcnt tty: riscom8, fix shutdown declaration TTY: fix typos tty: Power: fix suspend vt regression tty: vt: use printk_once tty: handle VT specific compat ioctls in vt driver n_tty: move echoctl check and clean up logic ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/kfifo.c2
-rw-r--r--kernel/power/console.c63
2 files changed, 6 insertions, 59 deletions
diff --git a/kernel/kfifo.c b/kernel/kfifo.c
index 26539e3228e..3765ff3c1bb 100644
--- a/kernel/kfifo.c
+++ b/kernel/kfifo.c
@@ -117,7 +117,7 @@ EXPORT_SYMBOL(kfifo_free);
* writer, you don't need extra locking to use these functions.
*/
unsigned int __kfifo_put(struct kfifo *fifo,
- unsigned char *buffer, unsigned int len)
+ const unsigned char *buffer, unsigned int len)
{
unsigned int l;
diff --git a/kernel/power/console.c b/kernel/power/console.c
index a3961b205de..5187136fe1d 100644
--- a/kernel/power/console.c
+++ b/kernel/power/console.c
@@ -14,56 +14,13 @@
#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
static int orig_fgconsole, orig_kmsg;
-static int disable_vt_switch;
-
-/*
- * Normally during a suspend, we allocate a new console and switch to it.
- * When we resume, we switch back to the original console. This switch
- * can be slow, so on systems where the framebuffer can handle restoration
- * of video registers anyways, there's little point in doing the console
- * switch. This function allows you to disable it by passing it '0'.
- */
-void pm_set_vt_switch(int do_switch)
-{
- acquire_console_sem();
- disable_vt_switch = !do_switch;
- release_console_sem();
-}
-EXPORT_SYMBOL(pm_set_vt_switch);
int pm_prepare_console(void)
{
- acquire_console_sem();
-
- if (disable_vt_switch) {
- release_console_sem();
- return 0;
- }
-
- orig_fgconsole = fg_console;
-
- if (vc_allocate(SUSPEND_CONSOLE)) {
- /* we can't have a free VC for now. Too bad,
- * we don't want to mess the screen for now. */
- release_console_sem();
+ orig_fgconsole = vt_move_to_console(SUSPEND_CONSOLE, 1);
+ if (orig_fgconsole < 0)
return 1;
- }
- if (set_console(SUSPEND_CONSOLE)) {
- /*
- * We're unable to switch to the SUSPEND_CONSOLE.
- * Let the calling function know so it can decide
- * what to do.
- */
- release_console_sem();
- return 1;
- }
- release_console_sem();
-
- if (vt_waitactive(SUSPEND_CONSOLE)) {
- pr_debug("Suspend: Can't switch VCs.");
- return 1;
- }
orig_kmsg = kmsg_redirect;
kmsg_redirect = SUSPEND_CONSOLE;
return 0;
@@ -71,19 +28,9 @@ int pm_prepare_console(void)
void pm_restore_console(void)
{
- acquire_console_sem();
- if (disable_vt_switch) {
- release_console_sem();
- return;
- }
- set_console(orig_fgconsole);
- release_console_sem();
-
- if (vt_waitactive(orig_fgconsole)) {
- pr_debug("Resume: Can't switch VCs.");
- return;
+ if (orig_fgconsole >= 0) {
+ vt_move_to_console(orig_fgconsole, 0);
+ kmsg_redirect = orig_kmsg;
}
-
- kmsg_redirect = orig_kmsg;
}
#endif