On Dec 6, 2007 6:07 PM, Gabriele Gorla <gorlik@xxxxxxxxxxxxxxx> wrote:
> disable packing of the TAG_TW_Device_Extension
> structure to prevent kernel unaligned accesses when
> accessing the spinlock inside the ioctl_wqueue structure.
> Fixes smartmontools kernel panic on alpha SMP
>
> Signed-off-by: Gabriele Gorla <gorlik@xxxxxxxxx>
> ---
>
> --- linux-2.6.23/drivers/scsi/3w-xxxx.h 2007-10-09 13:31:38.000000000 -0700
> +++ linux-2.6.23a/drivers/scsi/3w-xxxx.h 2007-12-06 17:46:05.000000000 -0800
> @@ -392,6 +392,8 @@
> unsigned char padding[12];
> } TW_Passthru;
>
> +#pragma pack()
> +
> typedef struct TAG_TW_Device_Extension {
> u32 base_addr;
> unsigned long *alignment_virtual_address[TW_Q_LENGTH];
> @@ -430,6 +432,4 @@
> wait_queue_head_t ioctl_wqueue;
> } TW_Device_Extension;
>
> -#pragma pack()
> -
> #endif /* _3W_XXXX_H */
>
>
>
ACK.... James, please apply.
-Adam
-
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