On 04/10/2017 05:22 PM, David Laight wrote:
> From: Ursula Braun
>> Sent: 07 April 2017 13:33
>> On 04/07/2017 01:25 PM, David Laight wrote:
>>> From: Ursula Braun
>>>> Sent: 05 April 2017 09:40
>>>> From: Hans Wippel <hwippel@xxxxxxxxxxxxxxxxxx>
>>>>
>>>> Avoid endianness warnings reported by sparse by (1) using endianness
>>>> conversions for assigning and using network packet fields, and (2)
>>>> removing unnecessary endianness conversions from qeth_l3_rebuild_skb. No
>>>> functional changes.
>>>>
>>>> Signed-off-by: Hans Wippel <hwippel@xxxxxxxxxxxxxxxxxx>
>>>> Signed-off-by: Ursula Braun <ubraun@xxxxxxxxxxxxxxxxxx>
>>>> ---
>>>> drivers/s390/net/qeth_core.h | 4 ++--
>>>> drivers/s390/net/qeth_core_main.c | 11 +++++-----
>>>> drivers/s390/net/qeth_l3_main.c | 46 +++++++++++++++++++--------------------
>>>> drivers/s390/net/qeth_l3_sys.c | 4 ++--
>>>> 4 files changed, 33 insertions(+), 32 deletions(-)
>>>>
>>>> diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
>>>> index 22aa2cd..6764ab9 100644
>>>> --- a/drivers/s390/net/qeth_core.h
>>>> +++ b/drivers/s390/net/qeth_core.h
>>>> @@ -844,9 +844,9 @@ static inline int qeth_get_ip_version(struct sk_buff *skb)
>>>> {
>>>> __be16 *p = &((struct ethhdr *)skb->data)->h_proto;
>>>>
>>>> - if (*p == ETH_P_8021Q)
>>>> + if (be16_to_cpu(*p) == ETH_P_8021Q)
>>>> p += 2;
>>>> - switch (*p) {
>>>> + switch (be16_to_cpu(*p)) {
>>>> case ETH_P_IPV6:
>>>
>>> These are definitely 'functional changes' on LE systems.
>> s390 is Big Endian; thus the change is basicly a NOP.
>
>> The only purpose of this kind of patches is getting rid
>> of sparse warnings with our code.
>
> Then say so in the commit message....
Understood, in future we will try to improve our commit message.
>
> What you are really doing is fixing the code in case anyone tries
> to use it on a LE system.
>
> David
>
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