diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/setup.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/early.c | 16 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 13 |
3 files changed, 5 insertions, 26 deletions
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index 6dc6c4fbc8e2..69289e99cabd 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -27,7 +27,6 @@ #define MACHINE_FLAG_DIAG9C BIT(3) #define MACHINE_FLAG_ESOP BIT(4) #define MACHINE_FLAG_IDTE BIT(5) -#define MACHINE_FLAG_DIAG44 BIT(6) #define MACHINE_FLAG_EDAT1 BIT(7) #define MACHINE_FLAG_EDAT2 BIT(8) #define MACHINE_FLAG_TOPOLOGY BIT(10) @@ -94,7 +93,6 @@ extern unsigned long __swsusp_reset_dma; #define MACHINE_HAS_DIAG9C (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C) #define MACHINE_HAS_ESOP (S390_lowcore.machine_flags & MACHINE_FLAG_ESOP) #define MACHINE_HAS_IDTE (S390_lowcore.machine_flags & MACHINE_FLAG_IDTE) -#define MACHINE_HAS_DIAG44 (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG44) #define MACHINE_HAS_EDAT1 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1) #define MACHINE_HAS_EDAT2 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2) #define MACHINE_HAS_TOPOLOGY (S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY) diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index db32a55daaec..cd241ee66eff 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -204,21 +204,6 @@ static __init void detect_diag9c(void) S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C; } -static __init void detect_diag44(void) -{ - int rc; - - diag_stat_inc(DIAG_STAT_X044); - asm volatile( - " diag 0,0,0x44\n" - "0: la %0,0\n" - "1:\n" - EX_TABLE(0b,1b) - : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc"); - if (!rc) - S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG44; -} - static __init void detect_machine_facilities(void) { if (test_facility(8)) { @@ -331,7 +316,6 @@ void __init startup_init(void) setup_arch_string(); setup_boot_command_line(); detect_diag9c(); - detect_diag44(); detect_machine_facilities(); save_vector_registers(); setup_topology(); diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 2794cad9312e..a08bd2522dd9 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -413,14 +413,11 @@ EXPORT_SYMBOL(arch_vcpu_is_preempted); void smp_yield_cpu(int cpu) { - if (MACHINE_HAS_DIAG9C) { - diag_stat_inc_norecursion(DIAG_STAT_X09C); - asm volatile("diag %0,0,0x9c" - : : "d" (pcpu_devices[cpu].address)); - } else if (MACHINE_HAS_DIAG44 && !smp_cpu_mtid) { - diag_stat_inc_norecursion(DIAG_STAT_X044); - asm volatile("diag 0,0,0x44"); - } + if (!MACHINE_HAS_DIAG9C) + return; + diag_stat_inc_norecursion(DIAG_STAT_X09C); + asm volatile("diag %0,0,0x9c" + : : "d" (pcpu_devices[cpu].address)); } /* |