From: Tobias Stoeckmann <tobias@stoeckmann.org>
To: Lucas De Marchi <lucas.de.marchi@gmail.com>
Cc: linux-modules <linux-modules@vger.kernel.org>
Subject: Re: [PATCH] Verify memory sizes on 32 bit systems.
Date: Fri, 3 Aug 2018 23:51:35 +0200 [thread overview]
Message-ID: <20180803215135.GA55860@pepper.home.stoeckmann.org> (raw)
In-Reply-To: <CAKi4VAKK5MSODC-VbFWG2d0p-eUXqrPbpNiomJb6+BEhfWjBVQ@mail.gmail.com>
On Fri, Aug 03, 2018 at 02:33:51PM -0700, Lucas De Marchi wrote:
> so you are casting the *sign* away, ok. But casting only st.st_size
> should suffice.
I've just tried with some examples and I couldn't trigger the
warning which I have seen in other situations like this, i.e.
"always false due to limited range of data type".
If I cast the off_t to size_t, the compiler knows that it is not
possible that it could ever be larger than SIZE_MAX, optimizing
the block away. So I took uintmax_t.
But as long as there's no annoying warning, I am fine with just
casting st_size.
Tobias
prev parent reply other threads:[~2018-08-03 21:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-30 19:01 [PATCH] Verify memory sizes on 32 bit systems Tobias Stoeckmann
2018-08-03 21:07 ` Lucas De Marchi
2018-08-03 21:10 ` Tobias Stoeckmann
2018-08-03 21:33 ` Lucas De Marchi
2018-08-03 21:51 ` Tobias Stoeckmann [this message]
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