s390/sclp: clear upper register halves in _sclp_print_early

[pandora-kernel.git] / arch / s390 / kernel / sclp.S

diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
index 95792d8..51ca1c3 100644 (file)
--- a/arch/s390/kernel/sclp.S
+++ b/arch/s390/kernel/sclp.S
@@ -270,6 +270,8 @@ ENTRY(_sclp_print_early)
        jno     .Lesa2
        ahi     %r15,-80
        stmh    %r6,%r15,96(%r15)               # store upper register halves
+       basr    %r13,0
+       lmh     %r0,%r15,.Lzeroes-.(%r13)       # clear upper register halves
 .Lesa2:
 #endif
        lr      %r10,%r2                        # save string pointer
@@ -293,6 +295,8 @@ ENTRY(_sclp_print_early)
 #endif
        lm      %r6,%r15,120(%r15)              # restore registers
        br      %r14
+.Lzeroes:
+       .fill   64,4,0
 
 .LwritedataS4:
        .long   0x00760005                      # SCLP command for write data