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-rw-r--r--arch/s390/kernel/entry.S4
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 02f11018e2df..c6cf338c9327 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -189,10 +189,6 @@ ENTRY(__switch_to)
stg %r3,__LC_CURRENT # store task struct of next
stg %r15,__LC_KERNEL_STACK # store end of kernel stack
lg %r15,__THREAD_ksp(%r1) # load kernel stack of next
- /* c4 is used in guest detection: arch/s390/kernel/perf_cpum_sf.c */
- xc __SF_EMPTY(8,%r15),__SF_EMPTY(%r15)
- mvc __SF_EMPTY+4(4,%r15),__TASK_pid(%r3)
- lctlg %c4,%c4,__SF_EMPTY(%r15) # load pid to control reg. 4
mvc __LC_CURRENT_PID(4,%r0),__TASK_pid(%r3) # store pid of next
lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPP