commit f3221a39de12377e6eb76460abf95b08f7fb9178
author Greg Ungerer <gerg@uclinux.org> Tue Jan 13 16:27:03 2009 +1000
committer Greg Ungerer <gerg@uclinux.org> Tue Jan 27 16:42:03 2009 +1000
tree a858e395d82badd7b1f40e0b2c54d50a8ef8a7dc
parent d88ffccbca0428e9b12feec45a2bc7f09efa1ab2

m68knommu: fix syscall restarting

Make restart blocks working, required for proper syscall restarting.
Derived from same changes for m68k arch by Andreas Schwab <schwab@suse.de>

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68knommu/kernel/signal.c

diff --git a/arch/m68knommu/kernel/signal.c b/arch/m68knommu/kernel/signal.c
index bbfcae9..5ab6a04 100644
--- a/arch/m68knommu/kernel/signal.c
+++ b/arch/m68knommu/kernel/signal.c
@@ -279,6 +279,9 @@
 	struct sigcontext context;
 	int err = 0;
 
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
 	/* get previous context */
 	if (copy_from_user(&context, usc, sizeof(context)))
 		goto badframe;
@@ -316,6 +319,9 @@
 	unsigned long usp;
 	int err;
 
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
 	err = __get_user(temp, &uc->uc_mcontext.version);
 	if (temp != MCONTEXT_VERSION)
 		goto badframe;
@@ -692,6 +698,15 @@
 		regs->d0 = -EINTR;
 		break;
 
+	case -ERESTART_RESTARTBLOCK:
+		if (!has_handler) {
+			regs->d0 = __NR_restart_syscall;
+			regs->pc -= 2;
+			break;
+		}
+		regs->d0 = -EINTR;
+		break;
+
 	case -ERESTARTSYS:
 		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
 			regs->d0 = -EINTR;