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author | rwatson <rwatson@FreeBSD.org> | 2015-01-06 12:59:37 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2015-01-06 12:59:37 +0000 |
commit | 60909669f00c3675bab15d82d9d63aaff61dfafa (patch) | |
tree | 8da641e0473d723ab1cc2e5a5772cb1eed6e4d6f /sys/dev/sbni | |
parent | ff9d81bf5b98e98550d75c454cbd7b6d5002e628 (diff) | |
download | FreeBSD-src-60909669f00c3675bab15d82d9d63aaff61dfafa.zip FreeBSD-src-60909669f00c3675bab15d82d9d63aaff61dfafa.tar.gz |
In order to reduce use of M_EXT outside of the mbuf allocator and
socket-buffer implementations, introduce a return value for MCLGET()
(and m_cljget() that underlies it) to allow the caller to avoid testing
M_EXT itself. Update all callers to use the return value.
With this change, very few network device drivers remain aware of
M_EXT; the primary exceptions lie in mbuf-chain pretty printers for
debugging, and in a few cases, custom mbuf and cluster allocation
implementations.
NB: This is a difficult-to-test change as it touches many drivers for
which I don't have physical devices. Instead we've gone for intensive
review, but further post-commit review would definitely be appreciated
to spot errors where changes could not easily be made mechanically,
but were largely mechanical in nature.
Differential Revision: https://reviews.freebsd.org/D1440
Reviewed by: adrian, bz, gnn
Sponsored by: EMC / Isilon Storage Division
Diffstat (limited to 'sys/dev/sbni')
-rw-r--r-- | sys/dev/sbni/if_sbni.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sys/dev/sbni/if_sbni.c b/sys/dev/sbni/if_sbni.c index c459ded..03200ef 100644 --- a/sys/dev/sbni/if_sbni.c +++ b/sys/dev/sbni/if_sbni.c @@ -878,8 +878,7 @@ get_rx_buf(struct sbni_softc *sc) */ if (ETHER_MAX_LEN + 2 > MHLEN) { /* Attach an mbuf cluster */ - MCLGET(m, M_NOWAIT); - if ((m->m_flags & M_EXT) == 0) { + if (!(MCLGET(m, M_NOWAIT))) { m_freem(m); return (0); } |