Brian King wrote:
> Removes the use of bitfields from the ibmveth driver. This results
> in slightly smaller object code.
>
> Signed-off-by: Brian King <[EMAIL PROTECTED]>
> ---
>
> linux-2.6-bjking1/drivers/net/ibmveth.c | 90
> ++++++++++++++++----------------
> linux-2.6-bjking1/drivers/net/ibmveth.h | 56 ++++++++-----------
> 2 files changed, 68 insertions(+), 78 deletions(-)
strong ACK :)
Though I also encourage you to avoid #defines for named constants, in
favor of
enum {
IBMVETH_BUF_VALID = (1U << 31),
IBMVETH_BUF_TOGGLE = (1U << 30),
IBMVETH_BUF_NO_CSUM = (1U << 25),
IBMVETH_BUF_CSUM_GOOD = (1U << 24),
IBMVETH_BUF_LEN_MASK = 0x00FFFFFF,
};
This illustrates:
1) The "1 << n" notation is FAR easier to read and compare with data
sheets. You're just adding to the trouble by requiring the reviewer's
brain to convert hex numbers to bits, even if most engineers can do this
in their sleep.
2) The named constants are available to the C compiler, which is more
friendly to debuggers. It also supplies type information to the C compiler.
3) Similar to #2, wading through C pre-processor output is much easier
when the symbols don't disappear.
These are recommendations, not requirements, but I've found these
techniques superior to cpp in many other drivers.
Jeff
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