> -----Original Message-----
> From:
linux-kernel-owner@vger.kernel.org
> [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Meelis Roos
> Sent: Thursday, July 26, 2007 4:30 PM
> To: Linux Kernel list
> Subject: integer overflow in i2o_block
>
>
> Got this warning on 32-bit ppc, seems real? And it seems I2O
> subsystem has no maintainer (only DPT_I2O has one)?
>
> CC [M] drivers/message/i2o/i2o_block.o
> drivers/message/i2o/i2o_block.c: In function 'i2o_block_transfer':
> drivers/message/i2o/i2o_block.c:837: warning: integer
> overflow in expression
>
> The line in question is
> msg->u.head[1] = cpu_to_le32(I2O_CMD_PRIVATE << 24 | HOST_TID
> << 12 | tid);
> and I2O_CMD_PRIVATE is defined as 0xFF. This gets "0xFF0100 |
> tid" and
> fits into 32-bit unsigned but not into 32-bit signed integer properly.
> Target value head[*] is defined as u32 so the claculation
> does not fit
> during computation? Should we mark the shiftable inputas as unsigned?
>
> --
> Meelis Roos (
mroos@linux.ee)
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