[lkml]   [2011]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH v2 2/5] firmware: Basic dmi-sysfs support
    On Wed, Feb 23, 2011 at 12:28 PM, Mike Waychison <> wrote:
    > Ya, I don't think there is anything that guarantees that dmi_header is
    > aligned.   The access is probably the struct copy I did here:
    >        /* Set the key */
    >        entry->dh = *dh;

    Yup - looking back at the assembly I see that one of the 2-byte
    accesses is offset 2
    (picking up ->handle), but the second is offset 0 (picking up ->type
    and ->length). The
    compiler assumed the structure was 2-byte aligned because of ->handle.

    > What if we changed that guy to use memcpy?  We'd probably need to
    > memcpy the dmi_system_event_log as well.  Patch attached (applies on
    > top of the entire patchset).

    With the patch, all the unaligned accesses go away.

    Tested-by: Tony Luck <>

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2011-02-23 22:31    [W:0.019 / U:3.908 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site