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OpenCloudOS-Kernel/arch/x86/kernel/cpu
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Thomas Gleixner a2584e1d5a x86/intel_rdt: Prevent deadlock against hotplug lock 
The cpu online/offline callbacks of intel_rdt lock rdtgroup_mutex nested
inside of cpu hotplug lock. rdtgroup_cpus_write() does it in reverse order.

Remove the get/put_online_cpus() calls from rdtgroup_cpus_write(). This is
safe against cpu hotplug as the resource group cpumasks are protected by
rdtgroup_mutex.

Found by review, but should have been found if authors would have bothered
to test cpu hotplug with lockdep enabled.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Shaohua Li <shli@fb.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
 		2016-11-15 18:35:49 +01:00
..
mcheck x86/mce/AMD: Extract the error address on SMCA systems 2016-09-13 15:23:13 +02:00
microcode Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 19:43:08 -07:00
mtrr x86: Apply more __ro_after_init and const 2016-08-10 14:55:05 +02:00
.gitignore
…
Makefile x86/intel_rdt: Add schemata file 2016-10-30 19:10:16 -06:00
amd.c x86/AMD: Apply erratum 665 on machines without a BIOS fix 2016-09-02 20:42:28 +02:00
bugs.c x86/fpu: Move various internal function prototypes to fpu/internal.h 2015-05-19 15:47:48 +02:00
bugs_64.c x86/cpu: Convert printk(KERN_<LEVEL> ...) to pr_<level>(...) 2016-02-03 10:30:03 +01:00
centaur.c Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 09:32:27 -07:00
common.c Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-10-03 16:13:28 -07:00
cpu.h x86/cpu: Restore MSR_IA32_ENERGY_PERF_BIAS after resume 2015-07-21 07:51:38 +02:00
cyrix.c x86/cpufeature: Replace cpu_has_fpu with boot_cpu_has() usage 2016-04-13 11:37:40 +02:00
hypervisor.c virt, sched: Add generic vCPU pinning support 2016-09-05 13:52:38 +02:00
intel.c Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-08-01 14:23:42 -04:00
intel_cacheinfo.c x86/intel_cacheinfo: Enable cache id in cache info 2016-10-26 23:12:37 +02:00
intel_rdt.c x86/intel_rdt: Add scheduler hook 2016-10-30 19:10:16 -06:00
intel_rdt_rdtgroup.c x86/intel_rdt: Prevent deadlock against hotplug lock 2016-11-15 18:35:49 +01:00
intel_rdt_schemata.c x86/intel_rdt: Add schemata file 2016-10-30 19:10:16 -06:00
match.c x86/kernel: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:41 +02:00
mkcapflags.sh x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
mshyperv.c x86/kernel: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:41 +02:00
perfctr-watchdog.c x86/kernel: Audit and remove any unnecessary uses of module.h 2016-07-14 15:06:41 +02:00
powerflags.c x86/cpu: Add advanced power management bits 2016-03-29 11:12:11 +02:00
proc.c x86: Replace cpu_**_mask() with topology_**_cpumask() 2015-05-27 15:22:17 +02:00
rdrand.c x86, asm: Use CC_SET()/CC_OUT() and static_cpu_has() in archrandom.h 2016-06-08 12:41:20 -07:00
scattered.c x86/cpufeature: Add RDT CPUID feature bits 2016-10-26 23:12:38 +02:00
topology.c x86/cpu: Convert printk(KERN_<LEVEL> ...) to pr_<level>(...) 2016-02-03 10:30:03 +01:00
transmeta.c Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 09:32:27 -07:00
umc.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
vmware.c x86/vmware: Skip timer_irq_works() check on VMware 2016-10-19 17:36:33 +02:00