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-rw-r--r--arch/s390/kernel/head64.S6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 6ba3f4512dd..e940e802cb4 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -81,7 +81,6 @@ startup_continue:
aghi %r1,1 # size is one more than end
larl %r2,memory_chunk
stg %r1,8(%r2) # store size of chunk
- j .Ldonemem
.Lslowmemdetect:
l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
@@ -156,6 +155,11 @@ startup_continue:
#
# find memory chunks.
#
+ larl %r9,memory_chunk # skip tprot loop if diag260
+ lg %r9,8(%r9) # memory detection was successful
+ ltgr %r9,%r9
+ jne .Ldonemem
+
lgr %r9,%r3 # end of mem
larl %r1,.Lchkmem # set program check address
stg %r1,__LC_PGM_NEW_PSW+8