linux-kernel - Re: [PATCH 24/35] Unionfs: Readdir state

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Date:	Tue, 5 Dec 2006 22:40:21 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	"Josef 'Jeff' Sipek" <jsipek@...sunysb.edu>
cc:	linux-kernel@...r.kernel.org, torvalds@...l.org, akpm@...l.org,
	hch@...radead.org, viro@....linux.org.uk,
	linux-fsdevel@...r.kernel.org, mhalcrow@...ibm.com
Subject: Re: [PATCH 24/35] Unionfs: Readdir state



>+	/* Round it up to the next highest power of two. */
>+	mallocsize--;
>+	mallocsize |= mallocsize >> 1;
>+	mallocsize |= mallocsize >> 2;
>+	mallocsize |= mallocsize >> 4;
>+	mallocsize |= mallocsize >> 8;
>+	mallocsize |= mallocsize >> 16;
>+	mallocsize++;

Interesting idea how to do it. This could be made a kernel-wide function and
be used by other subsystems (they sure do have find-next-power-of-two too). But
that another time another patch.


	-`J'
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