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s390/sclp: sign extend return value of _sclp_print_early()
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Mon, 5 Jan 2015 09:10:14 +0000 (10:10 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 8 Jan 2015 09:02:52 +0000 (10:02 +0100)
_sclp_print_early() has a return value, but misses to sign extend it
if called from 64 bit code.
This is not really a bug, since currently no caller cares what the
return value is.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/kernel/sclp.S patch | blob | blame | history

diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
index a41f2c99dcc85dbac9a2193960a6de63ce769120..7e77e03378f38f2e770e369982c92a1382e461b1 100644 (file)
--- a/arch/s390/kernel/sclp.S
+++ b/arch/s390/kernel/sclp.S
@@ -294,7 +294,8 @@ ENTRY(_sclp_print_early)
 #ifdef CONFIG_64BIT
        tm      LC_AR_MODE_ID,1
        jno     .Lesa3
-       lmh     %r6,%r15,96(%r15)               # store upper register halves
+       lgfr    %r2,%r2                         # sign extend return value
+       lmh     %r6,%r15,96(%r15)               # restore upper register halves
        ahi     %r15,80
 .Lesa3:
 #endif