path: root/kernel/hung_task.c
diff options
authorLi Zefan <lizefan@huawei.com>2013-09-23 16:43:58 +0800
committerIngo Molnar <mingo@kernel.org>2013-09-23 11:10:49 +0200
commitcd64647f043e3fd3569bcf068f47f030198ff93a (patch)
treec4ff621340758e4dde72ddb8c3a63d32604c0fbb /kernel/hung_task.c
parentd8524ae9d6f492a9c6db9f4d89c5f9b8782fa2d5 (diff)
hung_task: Change sysctl_hung_task_check_count to 'int'
As 'sysctl_hung_task_check_count' is 'unsigned long' when this value is assigned to max_count in check_hung_uninterruptible_tasks(), it's truncated to 'int' type. This causes a minor artifact: if we write 2^32 to sysctl.hung_task_check_count, hung task detection will be effectively disabled. With this fix, it will still truncate the user input to 32 bits, but reading sysctl.hung_task_check_count reflects the actual truncated value. Signed-off-by: Li Zefan <lizefan@huawei.com> Acked-by: Ingo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/r/523FFF4E.9050401@huawei.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/hung_task.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index 3e97fb126e6b..042252383fd2 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -20,7 +20,7 @@
* The number of tasks checked:
-unsigned long __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT;
+int __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT;
* Limit number of tasks checked in a batch.