linux-kernel - Re: memfill

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Message-ID: <28294.1486488555@warthog.procyon.org.uk>
Date:   Tue, 07 Feb 2017 17:29:15 +0000
From:   David Howells <dhowells@...hat.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     dhowells@...hat.com, Minchan Kim <minchan@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        sergey.senozhatsky@...il.com, iamjoonsoo.kim@....com,
        ngupta@...are.org, zhouxianrong@...wei.com, zhouxiyu@...wei.com,
        weidu.du@...wei.com, zhangshiming5@...wei.com,
        Mi.Sophia.Wang@...wei.com, won.ho.park@...wei.com
Subject: Re: memfill

Matthew Wilcox <willy@...radead.org> wrote:

> You've misunderstood the purpose of memfill.  memfill allows the caller
> to specify a pattern which is not a single byte in size, eg memfill(addr,
> 0x12345678, 64) would result in 0x12345678 being reproduced 16 times.
> memset(addr, 0x12345678, 64) would result in 0x78 being reproduced
> 64 times.

Ah.  Should it take a unsigned int rather than an unsigned long?

David