[PATCH] uml: S390 preparation, save an extra register

s390 tt-mode needs to save not only syscall number, but an further register
also.

Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/um/kernel/tt/syscall_user.c b/arch/um/kernel/tt/syscall_user.c
index e4e7e9c2224c..b218316cfdb2 100644
--- a/arch/um/kernel/tt/syscall_user.c
+++ b/arch/um/kernel/tt/syscall_user.c
@@ -63,6 +63,10 @@ void do_syscall(void *task, int pid, int local_using_sysemu)
 
         UPT_SYSCALL_NR(TASK_REGS(task)) = PT_SYSCALL_NR(proc_regs);
 
+#ifdef UPT_ORIGGPR2
+        UPT_ORIGGPR2(TASK_REGS(task)) = REGS_ORIGGPR2(proc_regs);
+#endif
+
         if(((unsigned long *) PT_IP(proc_regs) >= &_stext) &&
            ((unsigned long *) PT_IP(proc_regs) <= &_etext))
                 tracer_panic("I'm tracing myself and I can't get out");