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[PATCH] alpha: fix kernel panic during SysRq-b

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acquire_console_sem() does BUG() in interrupt context now, as in the case
of SysRq-b.

Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ivan Kokshaysky 2005-09-22 21:43:57 -07:00 committed by Linus Torvalds
parent 720b9429e8
commit 4b3c86a745
1 changed files with 4 additions and 0 deletions
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4
arch/alpha/kernel/process.c
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@ -127,6 +127,10 @@ common_shutdown_1(void *generic_ptr)
/* If booted from SRM, reset some of the original environment. */ /* If booted from SRM, reset some of the original environment. */
if (alpha_using_srm) { if (alpha_using_srm) {
#ifdef CONFIG_DUMMY_CONSOLE #ifdef CONFIG_DUMMY_CONSOLE
/* If we've gotten here after SysRq-b, leave interrupt
context before taking over the console. */
if (in_interrupt())
irq_exit();
/* This has the effect of resetting the VGA video origin. */ /* This has the effect of resetting the VGA video origin. */
take_over_console(&dummy_con, 0, MAX_NR_CONSOLES-1, 1); take_over_console(&dummy_con, 0, MAX_NR_CONSOLES-1, 1);
#endif #endif