linux-kernel - Re: [patch 1/6] mempolicy: convert MPOL constants to enum

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] [day] [month] [year] [list]

Date:	Sun, 2 Mar 2008 23:17:37 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Paul Jackson <pj@....com>, Christoph Lameter <clameter@....com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [patch 1/6] mempolicy: convert MPOL constants to enum

On Fri, 29 Feb 2008 16:44:59 -0800 (PST) David Rientjes <rientjes@...gle.com> wrote:

> The mempolicy mode constants, MPOL_DEFAULT, MPOL_PREFERRED, MPOL_BIND,
> and MPOL_INTERLEAVE, are better declared as part of an enum since they
> are sequentially numbered and cannot be combined.
> 
> The policy member of struct mempolicy is also converted from type short
> to type unsigned short.  A negative policy does not have any legitimate
> meaning, so it is possible to change its type in preparation for adding
> optional mode flags later.
> 
> The equivalent member of struct shmem_sb_info is also changed from int
> to unsigned short.
> 
> For compatibility, the policy formal to get_mempolicy() remains as a
> pointer to an int:
> 
> 	int get_mempolicy(int *policy, unsigned long *nmask,
> 			  unsigned long maxnode, unsigned long addr,
> 			  unsigned long flags);
> 
> although the only possible values is the range of type unsigned short.

The collisions between this work and Mel's

mm-use-zonelists-instead-of-zones-when-direct-reclaiming-pages.patch
mm-introduce-node_zonelist-for-accessing-the-zonelist-for-a-gfp-mask.patch
mm-remember-what-the-preferred-zone-is-for-zone_statistics.patch
mm-use-two-zonelist-that-are-filtered-by-gfp-mask.patch
mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx.patch
mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask.patch

are more than I'm comfortable with fixing, sorry.
--
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/