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    SubjectRe: [PATCH] libata: use WARN_ON_ONCE on hot paths
    Hi

    I've booted 2.6.29-rc1 (c59765042f53a79a7a65585042ff463b69cb248c)

    This time I've got only this warning:


    input: ThinkPad Extra Buttons as /devices/virtual/input/input5
    Driver 'sr' needs updating - please use bus_type methods
    ------------[ cut here ]------------
    WARNING: at drivers/ata/libata-sff.c:1017 ata_sff_hsm_move+0x6b0/0x7f0()
    Hardware name: 6464CTO
    Modules linked in: sr_mod(+) cdrom thinkpad_acpi rfkill backlight
    nvram button led_class battery intel_agp ac uhci_hcd ohci_hcd ehci_hcd
    usbcore [last unloaded: scsi_wait_scan]
    Pid: 1150, comm: udevd Not tainted 2.6.29-rc1 #6
    Call Trace:
    <IRQ> [<ffffffff80244d8f>] warn_slowpath+0xaf/0x110
    [<ffffffff8026fdc9>] ? __lock_acquire+0x5e9/0x1db0
    [<ffffffff80472316>] ? ata_sff_data_xfer32+0xa6/0xe0
    [<ffffffff80471b90>] ata_sff_hsm_move+0x6b0/0x7f0
    [<ffffffff80472029>] ata_sff_interrupt+0x1a9/0x2b0
    [<ffffffff80294ee5>] handle_IRQ_event+0x35/0x70
    [<ffffffff8029675c>] handle_edge_irq+0xbc/0x160
    [<ffffffff8020ec55>] do_IRQ+0xb5/0x1b0
    [<ffffffff8020cf53>] ret_from_intr+0x0/0xf
    <EOI> <4>---[ end trace 701c93e34e726fd9 ]---
    sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
    Uniform CD-ROM driver Revision: 3.20
    PM: Adding info for No Bus:sr0
    PM: Adding info for No Bus:11:0
    sr 3:0:0:0: Attached scsi CD-ROM sr0


    Zdenek


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