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From: Rob Landley <rob@landley.net>
To: Geert Uytterhoeven <geert+renesas@glider.be>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Rich Felker <dalias@libc.org>,
	"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>,
	Daniel Palmer <daniel@0x0f.com>,
	linux-sh@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sh: pgtable-3level: Fix cast to pointer from integer of different size
Date: Thu, 16 Sep 2021 20:32:20 -0500	[thread overview]
Message-ID: <1acace03-4273-a5ad-50b4-5ab8e3baa551@landley.net> (raw)
In-Reply-To: <2c2eef3c9a2f57e5609100a4864715ccf253d30f.1631713483.git.geert+renesas@glider.be>

On 9/15/21 8:50 AM, Geert Uytterhoeven wrote:
>     arch/sh/include/asm/pgtable-3level.h:37:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
...
> The truncation to "unsigned long" has been there since forever, so
> probably it still works fine ;-)

1) Linux is LP64 so sizeof(long) and sizeof(pointer) always match, so it's not
truncating.

2) The sh5 only ever shipped evaluation units, it never had a production run,
and we haven't implemented j64 yet, so all superh targets are currently 32 bit.
(I.E. it's complaining about _expanding_ the pointer, which shouldn't be a
problem as long as endianness is respected.)

Rob

  parent reply	other threads:[~2021-09-17  1:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-15 13:50 Geert Uytterhoeven
2021-09-15 13:58 ` Daniel Palmer
2021-09-16 12:06 ` Daniel Palmer
2021-09-17  1:32 ` Rob Landley [this message]
2021-09-17  9:21   ` Geert Uytterhoeven
2021-09-18  5:04     ` Rob Landley
2021-09-18 11:20       ` Geert Uytterhoeven
2021-09-23 15:20 ` John Paul Adrian Glaubitz

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