Re: [PATCH v8 1/6] software node: rename is_array to is_inline

From: "Bjørn Mork" <bjorn@mork.no>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
	Heikki Krogerus <heikki.krogerus@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH v8 1/6] software node: rename is_array to is_inline
Date: Wed, 13 Nov 2019 07:52:43 +0100
Message-ID: <87woc4s1xg.fsf@miraculix.mork.no> (raw)
In-Reply-To: <20191108042225.45391-2-dmitry.torokhov@gmail.com> (Dmitry Torokhov's message of "Thu, 7 Nov 2019 20:22:20 -0800")

Dmitry Torokhov <dmitry.torokhov@gmail.com> writes:

> We do not need a special flag to know if we are dealing with an array,
> as we can get that data from ratio between element length and the data
> size, however we do need a flag to know whether the data is stored
> directly inside property_entry or separately.

Doesn't a non-null prop->pointer tell you this?

And inverting the flag is unnecessarily risky IMHO. An all-zero prop
might now result in dereferencing a NULL prop->pointer instead of using
the empty prop->value.  Now I haven't looked at the code to see if this
is a real problem.  But I believe it's better not having to do that
anyway...

Bjørn