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    SubjectRe: [PATCH] mm: BUG when __kmap_atomic_idx crosses boundary
    On 07/30/2014 02:36 PM, Andrew Morton wrote:
    > On Wed, 30 Jul 2014 14:22:35 +0530 Chintan Pandya<cpandya@codeaurora.org> wrote:
    >
    >> __kmap_atomic_idx>= KM_TYPE_NR or< ZERO is a bug.
    >> Report it even if CONFIG_DEBUG_HIGHMEM is not enabled.
    >> That saves much debugging efforts.
    >
    > Please take considerably more care when preparing patch changelogs.
    Okay. I will prepare new commit message.
    >
    > kmap_atomic() is a very commonly called function so we'll need much
    > more detail than this to justify adding overhead to it.
    >
    > I don't think CONFIG_DEBUG_HIGHMEM really needs to exist. We could do
    > s/CONFIG_DEBUG_HIGHMEM/CONFIG_DEBUG_VM/g and perhaps your secret bug
    > whatever it was would have been found more easily.
    Um, we didn't get bug directly hitting here.
    >

    __kmap_atomic_idx should not be equal to KM_TYPE_NR anyway. So, at least
    I will share that patch. For changing DEBUG_HIGHMEM to DEBUG_VM, I will
    work on it.

    --
    QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a
    member of the Code Aurora Forum, hosted by The Linux Foundation


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