Re: [PATCH v18 49/80] c/r: support for UTS namespace

Quoting Nikita V. Youshchenko (yoush-/llMDZXAvAOHXe+LvDLADg@public.gmane.org):

quoted

+static struct uts_namespace *do_restore_uts_ns(struct ckpt_ctx *ctx)
...
+#ifdef CONFIG_UTS_NS
+	uts_ns = create_uts_ns();
+	if (!uts_ns) {
+		uts_ns = ERR_PTR(-ENOMEM);
+		goto out;
+	}
+	down_read(&uts_sem);
+	name = &uts_ns->name;
+	memcpy(name->sysname, h->sysname, sizeof(name->sysname));
+	memcpy(name->nodename, h->nodename, sizeof(name->nodename));
+	memcpy(name->release, h->release, sizeof(name->release));
+	memcpy(name->version, h->version, sizeof(name->version));
+	memcpy(name->machine, h->machine, sizeof(name->machine));
+	memcpy(name->domainname, h->domainname, sizeof(name->domainname));
+	up_read(&uts_sem);

Could you please explain what for is this down_read() / up_read() ?
You operate only on local objects: 'name' points to just-created 
uts_ns, 'h' is also local data.

Yup, good point, that looks unnecessary.

thanks,
-serge
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