commit b6ef5bb3d93efb95ba855a628740375c2280a59e
author Martin Schwidefsky <schwidefsky@de.ibm.com> Sun Oct 30 15:16:49 2011 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> Sun Oct 30 15:16:43 2011 +0100
tree fc26947a0111c7e71085a81e26f12c815f3f4c09
parent ccf45cafb0805978e6f13a672caca0e536e87cad

[S390] add TIF_SYSCALL thread flag

Add an explicit TIF_SYSCALL bit that indicates if a task is inside
a system call. The svc_code in the pt_regs structure is now only
valid if TIF_SYSCALL is set. With this definition TIF_RESTART_SVC
can be replaced with TIF_SYSCALL. Overall do_signal is a bit more
readable and it saves a few lines of code.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/compat_signal.c

diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index d7c8e54..72a1c8d 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -342,7 +342,7 @@
 		return err;
 
 	restore_fp_regs(&current->thread.fp_regs);
-	regs->svc_code = 0;	/* disable syscall checks */
+	clear_thread_flag(TIF_SYSCALL);	/* No longer in a system call */
 	return 0;
 }