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    SubjectRe: [PATCH] iommu/io-pgtable-arm: fix self-test WARNs on i386
    On Mon, Feb 16, 2015 at 06:38:20PM +0000, Will Deacon wrote:
    > Various build/boot bots have reported WARNs being triggered by the ARM
    > iopgtable LPAE self-tests on i386 machines.
    > This boils down to two instances of right-shifting a 32-bit unsigned
    > long (i.e. an iova) by more than the size of the type. On 32-bit ARM,
    > this happens to give us zero, hence my testing didn't catch this
    > earlier.
    > This patch fixes the issue by using DIV_ROUND_UP and explicit case to
    > to avoid the erroneous shifts.
    > Reported-by: Fengguang Wu <>
    > Reported-by: Huang Ying <>
    > Signed-off-by: Will Deacon <>
    > ---
    > Joerg -- please can you apply this as a fix for 3.20?

    Applied to my fixes branch, thanks Will.

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