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Subject[BUG ?] kmalloc() with GFP_KERNEL while holding spinlock ?
I noticed the following issue in the code:

in drivers/ata/libata-acpi.c:

static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
u32 event)
{
...
spin_lock_irqsave(ap->lock, flags);
...

if (dev) {
if (dev->sdev)
kobj = &dev->sdev->sdev_gendev.kobj;
} else
kobj = &ap->dev->kobj;

if (kobj) {
sprintf(event_string, "BAY_EVENT=%d", event);
kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
}

spin_unlock_irqrestore(ap->lock, flags);
...
}

and kobject_uevent_env() calls kzalloc(..., GFP_KERNEL);


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