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IP22ZILOG: fix lockup and sysrq

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- fix lockup when switching from early console to real console
 - make sysrq reliable
 - fix panic, if sysrq is issued before console is opened

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Acked-by: Ralf Baechle <[email protected]>
Cc: Alan Cox <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Thomas Bogendoerfer 2007-11-28 16:21:44 -08:00 • committed by Linus Torvalds
commit 68576cf122
4 changed files with 107 additions and 163 deletions
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2
include/asm-mips/system.h
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@ -209,8 +209,6 @@ extern void *set_except_vector(int n, void *addr);
extern unsigned long ebase;
extern void per_cpu_trap_init(void);
extern int stop_a_enabled;
/*
* See include/asm-ia64/system.h; prevents deadlock on SMP
* systems.

2
include/linux/serial_core.h
View file

@ -437,7 +437,7 @@ uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
#ifdef SUPPORT_SYSRQ
if (port->sysrq) {
if (ch && time_before(jiffies, port->sysrq)) {
handle_sysrq(ch, port->info->tty);
handle_sysrq(ch, port->info ? port->info->tty : NULL);
port->sysrq = 0;
return 1;
}