From: Kent Overstreet <[email protected]> needed for thread_with_file; also rare but not unheard of to need this in module code, when blocking on user input.
one workaround used by some code is wait_event_interruptible() - but that can be buggy if the outer context isn't expecting unwinding. Signed-off-by: Kent Overstreet <[email protected]> Cc: Andrew Morton <[email protected]> Cc: fuyuanli <[email protected]> Reviewed-by: Darrick J. Wong <[email protected]> Signed-off-by: Darrick J. Wong <[email protected]> --- kernel/hung_task.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 9a24574988d23..b2fc2727d6544 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -43,6 +43,7 @@ static int __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT; * Zero means infinite timeout - no checking done: */ unsigned long __read_mostly sysctl_hung_task_timeout_secs = CONFIG_DEFAULT_HUNG_TASK_TIMEOUT; +EXPORT_SYMBOL_GPL(sysctl_hung_task_timeout_secs); /* * Zero (default value) means use sysctl_hung_task_timeout_secs:
