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e1000: remove unused ifp backpointer

Description

e1000: remove unused ifp backpointer

The ifp (struct ifnet) backpointer in the e1000 private ifnet
data is not used anymore since the iflib transition.
Remove it so that developers are not tempted to use it and
get a NULL pointer dereference.

Reviewed by: markj, kbowling, erj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D33157

(cherry picked from commit d91559564dc647846479824340bdf94b7cf98c05)

Details

Provenance
vmaffioneAuthored on Nov 29 2021, 9:28 PM
Reviewer
markj
Differential Revision
D33157: e1000: remove unused ifp backpointer
Parents
rG94dad8b20dff: Update arch(7) after 06c24143c4af
Branches
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