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iflib: retire MB_DTOR_SKIP

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The flag was added in 2016 but remains unused.

Reviewed by:	kbowling
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D30958
This commit is contained in:
Mateusz Guzik 2021-06-30 15:09:40 +02:00
parent 2eb9ad4274
commit fb32c8dbeb
2 changed files with 2 additions and 3 deletions
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3
sys/kern/kern_mbuf.c
View File

@ -658,7 +658,8 @@ mb_dtor_mbuf(void *mem, int size, void *arg)
flags = (unsigned long)arg;
KASSERT((m->m_flags & M_NOFREE) == 0, ("%s: M_NOFREE set", __func__));
if (!(flags & MB_DTOR_SKIP) && (m->m_flags & M_PKTHDR) && !SLIST_EMPTY(&m->m_pkthdr.tags))
KASSERT((flags & 0x1) == 0, ("%s: obsolete MB_DTOR_SKIP passed", __func__));
if ((m->m_flags & M_PKTHDR) && !SLIST_EMPTY(&m->m_pkthdr.tags))
m_tag_delete_chain(m, NULL);
}

2
sys/sys/mbuf.h
View File

@ -478,8 +478,6 @@ m_epg_pagelen(const struct mbuf *m, int pidx, int pgoff)
#define M_PROTO10 0x00400000 /* protocol-specific */
#define M_PROTO11 0x00800000 /* protocol-specific */
#define MB_DTOR_SKIP 0x1 /* don't pollute the cache by touching a freed mbuf */
/*
* Flags to purge when crossing layers.
*/