[S390] cleanup system call parameter setup

Do the setup of the stack overflow argument for the sixth system
call parameter right before the branch to the system call function.
That simplifies the system call parameter access code.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 736d7010629e..5efce7202984 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -254,12 +254,11 @@ sysc_do_svc:
         bnl     BASED(sysc_nr_ok)
         lr      %r7,%r1           # copy svc number to %r7
 sysc_nr_ok:
-        mvc     SP_ARGS(4,%r15),SP_R7(%r15)
-sysc_do_restart:
         sth     %r7,SP_SVCNR(%r15)
         sll     %r7,2             # svc number *4
         l       %r8,BASED(.Lsysc_table)
         tm      __TI_flags+2(%r9),_TIF_SYSCALL
+        mvc     SP_ARGS(4,%r15),SP_R7(%r15)
         l       %r8,0(%r7,%r8)    # get system call addr.
         bnz     BASED(sysc_tracesys)
         basr    %r14,%r8          # call sys_xxxx
@@ -347,7 +346,7 @@ sysc_restart:
         l       %r7,SP_R2(%r15)         # load new svc number
         mvc     SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
         lm      %r2,%r6,SP_R2(%r15)     # load svc arguments
-        b       BASED(sysc_do_restart)  # restart svc
+        b       BASED(sysc_nr_ok)       # restart svc
 
 #
 # _TIF_SINGLE_STEP is set, call do_single_step
@@ -380,6 +379,7 @@ sysc_tracesys:
         l       %r8,0(%r7,%r8)
 sysc_tracego:
         lm      %r3,%r6,SP_R3(%r15)
+        mvc     SP_ARGS(4,%r15),SP_R7(%r15)
         l       %r2,SP_ORIG_R2(%r15)
         basr    %r14,%r8                # call sys_xxx
         st      %r2,SP_R2(%r15)         # store return value