korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-15 06:55:13 +08:00
Code Issues Packages Projects Releases Wiki Activity
eff722b06b
linux/arch/ia64/kernel
History
Srivatsa S. Bhat eff722b06b ia64, salinfo: Fix hotplug callback registration 
Subsystems that want to register CPU hotplug callbacks, as well as perform
initialization for the CPUs that are already online, often do it as shown
below:

	get_online_cpus();

	for_each_online_cpu(cpu)
		init_cpu(cpu);

	register_cpu_notifier(&foobar_cpu_notifier);

	put_online_cpus();

This is wrong, since it is prone to ABBA deadlocks involving the
cpu_add_remove_lock and the cpu_hotplug.lock (when running concurrently
with CPU hotplug operations).

Instead, the correct and race-free way of performing the callback
registration is:

	cpu_notifier_register_begin();

	for_each_online_cpu(cpu)
		init_cpu(cpu);

	/* Note the use of the double underscored version of the API */
	__register_cpu_notifier(&foobar_cpu_notifier);

	cpu_notifier_register_done();

Fix the salinfo code in ia64 by using this latter form of callback
registration.

Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-03-20 13:43:40 +01:00
..
.gitignore [IA64] Cleanup generated file not ignored by .gitignore 2008-08-04 11:06:16 -07:00
acpi-ext.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
acpi.c ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
asm-offsets.c ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
audit.c [IA64] Remove COMPAT_IA32 support 2010-02-08 10:42:17 -08:00
brl_emu.c
crash_dump.c crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn 2011-03-23 19:47:19 -07:00
crash.c sysctl: Drop & in front of every proc_handler. 2009-11-18 08:37:40 -08:00
cyclone.c ia64: Replace clocksource.fsys_mmio with generic arch data 2011-07-14 17:57:09 -07:00
dma-mapping.c ia64: Add export.h to arch/ia64 specific files as required 2011-10-31 19:30:58 -04:00
efi_stub.S
efi.c efi: x86: ia64: provide a generic efi_config_init() 2013-09-05 13:29:29 +01:00
elfcore.c switch elf_core_write_extra_data() to dump_emit() 2013-11-09 00:16:23 -05:00
entry.h
entry.S [IA64] Wire up new sched_setattr and sched_getattr syscalls 2014-01-28 09:52:53 -08:00
err_inject.c [IA64] Delete __cpuinit usage from all ia64 users 2013-06-24 15:44:27 -07:00
esi_stub.S
esi.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
fsys.S Fix broken fsys_getppid() 2013-03-19 16:14:52 -07:00
fsyscall_gtod_data.h ia64: vsyscall: Use seqcount instead of seqlock 2012-03-15 18:17:59 -07:00
ftrace.c ftrace, ia64: IA64 dynamic ftrace support 2009-01-14 12:11:31 +01:00
gate-data.S Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
gate.lds.S Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
gate.S Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
head.S ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
ia64_ksyms.c treewide: Put a space between #include and FILE 2012-06-28 11:44:36 +02:00
init_task.c Rename .data.init_task to .data..init_task. 2010-03-03 11:25:58 +01:00
iosapic.c Fix kexec oops when iosapic was removed 2013-03-19 16:14:53 -07:00
irq_ia64.c random: remove rand_initialize_irq() 2012-07-19 10:38:32 -04:00
irq_lsapic.c ia64: Convert lsapic to new irq_chip functions 2011-03-29 14:48:02 +02:00
irq.c Fix initialization of CMCI/CMCP interrupts 2013-04-02 09:37:06 -07:00
ivt.S cputime: Generic on-demand virtual cputime accounting 2013-01-27 19:23:27 +01:00
jprobes.S [IA64] Move include/asm-ia64 to arch/ia64/include/asm 2008-08-01 10:21:21 -07:00
kprobes.c doc: typo on word accounting in kprobes.c in mutliple architectures 2013-10-14 15:46:39 +02:00
machine_kexec.c [IA64] kexec: Move the dereference below the NULL test 2012-09-10 14:31:23 -07:00
machvec.c Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
Makefile cpufreq: ia64: move cpufreq driver to drivers/cpufreq 2013-04-10 13:19:25 +02:00
Makefile.gate Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
mca_asm.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
mca_drv_asm.S
mca_drv.c Remove cast for kmalloc return value 2013-03-19 16:14:53 -07:00
mca_drv.h
mca.c [IA64] Delete __cpuinit usage from all ia64 users 2013-06-24 15:44:27 -07:00
minstate.h cputime: Generic on-demand virtual cputime accounting 2013-01-27 19:23:27 +01:00
module.c modules: make arch's use default loader hooks 2011-07-24 22:06:04 +09:30
msi_ia64.c arch/ia64: remove references to cpu_*_map 2012-03-28 17:14:36 -07:00
nr-irqs.c ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
numa.c [IA64] Delete __cpuinit usage from all ia64 users 2013-06-24 15:44:27 -07:00
pal.S
palinfo.c [IA64] Delete __cpuinit usage from all ia64 users 2013-06-24 15:44:27 -07:00
paravirt_inst.h ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
paravirt_patch.c ia64/pv_op/binarypatch: add helper functions to support binary patching for paravirt_ops. 2009-03-26 11:02:31 -07:00
paravirt_patchlist.c [IA64] Fix build error in paravirt_patchlist.c 2009-06-17 09:04:40 -07:00
paravirt_patchlist.h ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
paravirt.c static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]() 2012-02-24 10:05:59 +01:00
paravirtentry.S Rename .data.read_mostly to .data..read_mostly. 2010-03-03 11:26:00 +01:00
patch.c Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
pci-dma.c [IA64] pci: Remove unused fallback_dev 2013-06-03 16:04:31 -07:00
pci-swiotlb.c X86 & IA64: adapt for dma_map_ops changes 2012-03-28 16:36:31 +02:00
perfmon_default_smpl.c Fix common misspellings 2011-03-31 11:26:23 -03:00
perfmon_generic.h
perfmon_itanium.h
perfmon_mckinley.h
perfmon_montecito.h
perfmon.c consolidate simple ->d_delete() instances 2013-11-15 22:04:17 -05:00
process.c dump_stack: unify debug information printed by show_regs() 2013-04-30 17:04:02 -07:00
ptrace.c ia64: kill thread_matches(), unexport ptrace_check_attach() 2013-01-20 12:26:05 -08:00
relocate_kernel.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
sal.c
salinfo.c ia64, salinfo: Fix hotplug callback registration 2014-03-20 13:43:40 +01:00
setup.c DMI: Parse memory device (type 17) in SMBIOS 2013-10-23 10:10:12 -07:00
sigframe.h
signal.c constify copy_siginfo_to_user{,32}() 2013-11-09 00:16:29 -05:00
smp.c Merge branch 'akpm' (Andrew's patch-bomb) 2012-03-28 17:19:28 -07:00
smpboot.c [IA64] Delete __cpuinit usage from all ia64 users 2013-06-24 15:44:27 -07:00
stacktrace.c [IA64] Add CONFIG_STACKTRACE_SUPPORT 2010-09-23 13:52:07 -07:00
sys_ia64.c mm: use vm_unmapped_area() on ia64 architecture 2013-02-22 13:46:59 -08:00
time.c kvm: Prepare to add generic guest entry/exit callbacks 2013-01-27 20:35:40 +01:00
topology.c [IA64] Delete __cpuinit usage from all ia64 users 2013-06-24 15:44:27 -07:00
traps.c [IA64] Fix trap #45 handling 2013-06-03 15:47:42 -07:00
unaligned.c [IA64] use __ratelimit 2010-05-18 14:45:54 -07:00
uncached.c mm: fix GFP_THISNODE callers and clarify 2014-03-10 17:26:19 -07:00
unwind_decoder.c
unwind_i.h
unwind.c Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
vmlinux.lds.S ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00