Fix signal handling to use store/restore instead of block/unblock
as that may cause IRQ reentrancy
Signed-off-by: Anton Ivanov <aiva...@brocade.com>
---
arch/um/os-Linux/skas/process.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 13c5a2c..5916267 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -313,6 +313,7 @@ void userspace(struct uml_pt_regs *regs)
int err, status, op, pid = userspace_pid[0];
/* To prevent races if using_sysemu changes under us.*/
int local_using_sysemu;
+ unsigned long flags;
siginfo_t si;
/* Handle any immediate reschedules or signals */
@@ -396,9 +397,9 @@ void userspace(struct uml_pt_regs *regs)
case SIGBUS:
case SIGFPE:
case SIGWINCH:
- block_signals();
+ flags = set_signals(0);
(*sig_info[sig])(sig, (struct siginfo *)&si,
regs);
- unblock_signals();
+ set_signals(flags);
break;
default:
printk(UM_KERN_ERR "userspace - child stopped "
@@ -586,15 +587,16 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
void initial_thread_cb_skas(void (*proc)(void *), void *arg)
{
jmp_buf here;
+ unsigned long int flags;
cb_proc = proc;
cb_arg = arg;
cb_back = &here;
- block_signals();
+ flags = set_signals(0);
if (UML_SETJMP(&here) == 0)
UML_LONGJMP(&initial_jmpbuf, INIT_JMP_CALLBACK);
- unblock_signals();
+ set_signals(flags);
cb_proc = NULL;
cb_arg = NULL;
--
2.1.4
------------------------------------------------------------------------------
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
