linux-kernel - RE: [PATCH 2/2] ACPICA: acpidump: Remove translation protection on integer types.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 13 Feb 2014 23:34:45 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	"Zheng, Lv" <lv.zheng@...el.com>,
	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
	"Brown, Len" <len.brown@...el.com>
CC:	Lv Zheng <zetalog@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"Yu, Fenghua" <fenghua.yu@...el.com>
Subject: RE: [PATCH 2/2] ACPICA: acpidump: Remove translation protection on
 integer types.

>    All definitions are equal except ACPI_UINT64_MAX for CONFIG_IA64.  It
>    is changed from sizeof(unsigned long) to sizeof(unsigned long long).
>    By investigation, 64bit Linux kernel build is LP64 compliant, i.e.,
>    sizeof(long) and (pointer) are 64.  As sizeof(unsigned long) equals to
>    sizeof(unsigned long long) on IA64 platform where CONFIG_64BIT cannot be
>    disabled, this change actually will not affect the value of
>    ACPI_UINT64_MAX on IA64 platforms.

This all looks correct to me - it really shouldn't make any difference
to ia64 whether we use "long" or "long long" ... both are 8-byte entities.
The compiler would complain in some places if you mixed & matched
incorrectly (e.g. printk("val = %ld\n", val); will give a warning if val has
been switched from "long" to "long long" and the format would need
to change to "%lld").  But it looks like nothing like that happens as a
result of this patch. All my ia64 configs build with no new warnings.

Boots OK too.

-Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/