linux-kernel - __get_vm_area() with VM

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Date:	Thu, 13 Dec 2007 16:56:42 +0000
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	<James.Bottomley@...senPartnership.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: __get_vm_area() with VM_IOREMAP

James,

in a change over three years ago, you added implicit aligning to
__get_vm_area() for VM_IOREMAP requests. I wonder, though,
whether it was intentional to over-align requests of sizes that are
an exact power of two (and between PAGE_SIZE and
(1 << IOREMAP_MAX_ORDER)). I would think that the argument of
fls() should be (size - 1) rather than size.

Thanks, Jan

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