linux-kernel - Re: [PATCH 3/8] sparc: prom: use property "name" directly to construct node names

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Date:   Thu, 08 Nov 2018 19:13:20 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     robh@...nel.org
Cc:     frowand.list@...il.com, linux-kernel@...r.kernel.org,
        sparclinux@...r.kernel.org
Subject: Re: [PATCH 3/8] sparc: prom: use property "name" directly to
 construct node names

From: Rob Herring <robh@...nel.org>
Date: Wed,  7 Nov 2018 16:31:46 -0600

> In preparation to remove direct accesses to the device_node.name
> pointer, retrieve the node name from the "name" property instead.
> 
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: sparclinux@...r.kernel.org
> Signed-off-by: Rob Herring <robh@...nel.org>

On some 32-bit sparcs, the OF runs in non-cached memory.

Sucking in the OF device tree take a signficant amount of the
boot time on such systems.

And these changes are going to make it even slower.

Please just put a wrapper around dp->name or whatever and use that,
instead of making more get property OF calls which can be very
expensive.