hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

syscall: Implement a convinience function restart_syscall 

Currently when we have a signal pending we have the functionality
to restart that the current system call.  There are other cases
such as nasty lock ordering issues where it makes sense to have
a simple fix that uses try lock and restarts the system call.
Buying time to figure out how to rework the locking strategy.

Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2009-05-13 16:55:10 +00:00 committed by David S. Miller
parent 69e3c75f4d
commit 690cc3ffe3
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/sched.h
View File

@ -2178,6 +2178,12 @@ static inline int test_tsk_need_resched(struct task_struct *tsk)
return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED)); return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED));
} }
static inline int restart_syscall(void)
{
set_tsk_thread_flag(current, TIF_SIGPENDING);
return -ERESTARTNOINTR;
}
static inline int signal_pending(struct task_struct *p) static inline int signal_pending(struct task_struct *p)
{ {
return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING)); return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));