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author | Linus Torvalds | 2015-04-15 05:51:44 +0200 |
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committer | Linus Torvalds | 2015-04-15 05:51:44 +0200 |
commit | bdfa54dfd9eea001274dbcd622657a904fe43b81 (patch) | |
tree | ab251ab359e519656d7061bbe8db4c7ab355404b /arch/s390/kernel/smp.c | |
parent | Merge tag 'pm+acpi-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/... (diff) | |
parent | s390/smp: wait until secondaries are active & online (diff) | |
download | kernel-qcow2-linux-bdfa54dfd9eea001274dbcd622657a904fe43b81.tar.gz kernel-qcow2-linux-bdfa54dfd9eea001274dbcd622657a904fe43b81.tar.xz kernel-qcow2-linux-bdfa54dfd9eea001274dbcd622657a904fe43b81.zip |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky:
"The major change in this merge is the removal of the support for
31-bit kernels. Naturally 31-bit user space will continue to work via
the compat layer.
And then some cleanup, some improvements and bug fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (23 commits)
s390/smp: wait until secondaries are active & online
s390/hibernate: fix save and restore of kernel text section
s390/cacheinfo: add missing facility check
s390/syscalls: simplify syscall_get_arch()
s390/irq: enforce correct irqclass_sub_desc array size
s390: remove "64" suffix from mem64.S and swsusp_asm64.S
s390/ipl: cleanup macro usage
s390/ipl: cleanup shutdown_action attributes
s390/ipl: cleanup bin attr usage
s390/uprobes: fix address space annotation
s390: add missing arch_release_task_struct() declaration
s390: make couple of functions and variables static
s390/maccess: improve s390_kernel_write()
s390/maccess: remove potentially broken probe_kernel_write()
s390/watchdog: support for KVM hypervisors and delete pr_info messages
s390/watchdog: enable KEEPALIVE for /dev/watchdog
s390/dasd: remove setting of scheduler from driver
s390/traps: panic() instead of die() on translation exception
s390: remove test_facility(2) (== z/Architecture mode active) checks
s390/cmpxchg: simplify cmpxchg_double
...
Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r-- | arch/s390/kernel/smp.c | 36 |
1 files changed, 2 insertions, 34 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index db8f1115a3bf..efd2c1968000 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -198,19 +198,11 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu) lc->panic_stack = panic_stack + PANIC_FRAME_OFFSET; lc->cpu_nr = cpu; lc->spinlock_lockval = arch_spin_lockval(cpu); -#ifndef CONFIG_64BIT - if (MACHINE_HAS_IEEE) { - lc->extended_save_area_addr = get_zeroed_page(GFP_KERNEL); - if (!lc->extended_save_area_addr) - goto out; - } -#else if (MACHINE_HAS_VX) lc->vector_save_area_addr = (unsigned long) &lc->vector_save_area; if (vdso_alloc_per_cpu(lc)) goto out; -#endif lowcore_ptr[cpu] = lc; pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc); return 0; @@ -229,16 +221,7 @@ static void pcpu_free_lowcore(struct pcpu *pcpu) { pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0); lowcore_ptr[pcpu - pcpu_devices] = NULL; -#ifndef CONFIG_64BIT - if (MACHINE_HAS_IEEE) { - struct _lowcore *lc = pcpu->lowcore; - - free_page((unsigned long) lc->extended_save_area_addr); - lc->extended_save_area_addr = 0; - } -#else vdso_free_per_cpu(pcpu->lowcore); -#endif if (pcpu == &pcpu_devices[0]) return; free_page(pcpu->lowcore->panic_stack-PANIC_FRAME_OFFSET); @@ -492,22 +475,6 @@ void arch_send_call_function_single_ipi(int cpu) pcpu_ec_call(pcpu_devices + cpu, ec_call_function_single); } -#ifndef CONFIG_64BIT -/* - * this function sends a 'purge tlb' signal to another CPU. - */ -static void smp_ptlb_callback(void *info) -{ - __tlb_flush_local(); -} - -void smp_ptlb_all(void) -{ - on_each_cpu(smp_ptlb_callback, NULL, 1); -} -EXPORT_SYMBOL(smp_ptlb_all); -#endif /* ! CONFIG_64BIT */ - /* * this function sends a 'reschedule' IPI to another CPU. * it goes straight through and wastes no time serializing @@ -851,7 +818,8 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle) pcpu_prepare_secondary(pcpu, cpu); pcpu_attach_task(pcpu, tidle); pcpu_start_fn(pcpu, smp_start_secondary, NULL); - while (!cpu_online(cpu)) + /* Wait until cpu puts itself in the online & active maps */ + while (!cpu_online(cpu) || !cpu_active(cpu)) cpu_relax(); return 0; } |