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Date: Mon, 21 Apr 2014 17:20:59 +0800 From: Li Zhong <zhong@...ux.vnet.ibm.com> To: Tejun Heo <tj@...nel.org> Cc: LKML <linux-kernel@...r.kernel.org>, gregkh@...uxfoundation.org, rafael.j.wysocki@...el.com, toshi.kani@...com Subject: [RFC PATCH v5 1/2] Use lock_device_hotplug() in cpu_probe_store() and cpu_release_store() While auditing the usage of lock_device_hotplug_sysfs() for implementing it in another way in following patch, it seems to me that the code here is to add/remove device, and the files probe/release for cpu bus themselves won't be removed. So it seems to me there is no s_active related deadlock here, and we could just use lock_device_hotplug(). Signed-off-by: Li Zhong <zhong@...ux.vnet.ibm.com> --- drivers/base/cpu.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 006b1bc..9483225 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -88,9 +88,7 @@ static ssize_t cpu_probe_store(struct device *dev, ssize_t cnt; int ret; - ret = lock_device_hotplug_sysfs(); - if (ret) - return ret; + lock_device_hotplug(); cnt = arch_cpu_probe(buf, count); @@ -106,9 +104,7 @@ static ssize_t cpu_release_store(struct device *dev, ssize_t cnt; int ret; - ret = lock_device_hotplug_sysfs(); - if (ret) - return ret; + lock_device_hotplug(); cnt = arch_cpu_release(buf, count); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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