Report the value of test_syscall_work(SYSCALL_USER_DISPATCH)) in
proc/status if GENERIC_ENTRY is enabled or the arch has implemented it.
This provides an indicator to userland checkpoint/restore software that
it must manage special signal conditions (similar to SECCOMP)
Signed-off-by: Gregory Price <gregory.price@xxxxxxxxxxxx>
---
fs/proc/array.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 49283b8103c7..d4e4ee2409c6 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -428,6 +428,15 @@ static inline void task_thp_status(struct seq_file *m, struct mm_struct *mm)
seq_printf(m, "THP_enabled:\t%d\n", thp_enabled);
}
+static inline void task_syscall_user_dispatch(struct seq_file *m,
+ struct task_struct *p)
+{
+#if defined(CONFIG_GENERIC_ENTRY) || defined(TIF_SYSCALL_USER_DISPATCH)
+ seq_put_decimal_ull(m, "\nSyscall_user_dispatch:\t",
+ test_task_syscall_work(p, SYSCALL_USER_DISPATCH));
+#endif
+}
+
int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
@@ -451,6 +460,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
task_cpus_allowed(m, task);
cpuset_task_status_allowed(m, task);
task_context_switch_counts(m, task);
+ task_syscall_user_dispatch(m, task);
return 0;
}
--
2.39.0
