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ed6a66ca6c
freebsd-nq/sys
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Robert Watson ed6a66ca6c To ease changes to underlying mbuf structure and the mbuf allocator, reduce 
the knowledge of mbuf layout, and in particular constants such as M_EXT,
MLEN, MHLEN, and so on, in mbuf consumers by unifying various alignment
utility functions (M_ALIGN(), MH_ALIGN(), MEXT_ALIGN() in a single
M_ALIGN() macro, implemented by a now-inlined m_align() function:

- Move m_align() from uipc_mbuf.c to mbuf.h; mark as __inline.
- Reimplement M_ALIGN(), MH_ALIGN(), and MEXT_ALIGN() using m_align().
- Update consumers around the tree to simply use M_ALIGN().

This change eliminates a number of cases where mbuf consumers must be aware
of whether or not mbufs returned by the allocator use external storage, but
also assumptions about the size of the returned mbuf. This will make it
easier to introduce changes in how we use external storage, as well as
features such as variable-size mbufs.

Differential Revision:	https://reviews.freebsd.org/D1436
Reviewed by:	glebius, trasz, gnn, bz
Sponsored by:	EMC / Isilon Storage Division
2015-01-05 09:58:32 +00:00
..
amd64 For /dev/mem and /dev/kmem accesses, avoid asserting that addresses 2015-01-03 01:28:58 +00:00
arm Switch all arm kernels with option SMP to use SCHED_ULE instead of 4BSD. 2015-01-03 23:57:03 +00:00
boot Add kexec-based Linux shim loader for use with the firmware petitboot 2015-01-05 04:33:39 +00:00
bsm
cam Hide block device VPD pages for non-block devices. 2014-12-23 15:18:28 +00:00
cddl Correct zpool list displaying invalid EXPANDSZ for unavailable pool vdevs 2014-12-31 04:54:48 +00:00
compat Regen for r276654 (__getcwd()). 2015-01-04 10:40:23 +00:00
conf Eliminate uninitialized variable warnings in kernel and module builds when 2015-01-04 20:08:24 +00:00
contrib Use the same 6000 series g2{a,b} firmware versions when embedding these 2014-12-27 17:10:35 +00:00
crypto Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
ddb ddb: ANSI-fy function declarations. 2014-10-12 18:01:52 +00:00
dev To ease changes to underlying mbuf structure and the mbuf allocator, reduce 2015-01-05 09:58:32 +00:00
fs Convert nullfs hash lock from a mutex to an rwlock. 2014-12-30 21:41:35 +00:00
gdb Add support for gdb's memory searching capabilities to our in-kernel gdb 2014-09-05 16:40:47 +00:00
geom Remove support for FreeBSD 7 and really old FreeBSD 8. The classifiers 2014-12-20 00:04:01 +00:00
gnu reiserfs: Use signed i_nlink 2014-09-25 19:10:32 +00:00
i386 Garbage collect the asr driver. Hardware for it has not been produced in 2015-01-02 05:34:14 +00:00
isa
kern To ease changes to underlying mbuf structure and the mbuf allocator, reduce 2015-01-05 09:58:32 +00:00
kgssapi Avoid dynamic syscall overhead for statically compiled modules. 2014-10-26 19:42:44 +00:00
libkern Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
mips Remove the remnants of the OpenWRT/Linux bits that this was based off 2015-01-05 05:30:07 +00:00
modules The radeon DRI module doesn't really work correctly on powerpc, so don't build 2015-01-03 22:36:18 +00:00
net Extern declarations in C files loses compile-time checking that 2014-12-25 21:32:37 +00:00
net80211 To ease changes to underlying mbuf structure and the mbuf allocator, reduce 2015-01-05 09:58:32 +00:00
netgraph In preparation of merging projects/sendfile, transform bare access to 2014-11-12 09:57:15 +00:00
netinet To ease changes to underlying mbuf structure and the mbuf allocator, reduce 2015-01-05 09:58:32 +00:00
netinet6 To ease changes to underlying mbuf structure and the mbuf allocator, reduce 2015-01-05 09:58:32 +00:00
netipsec Fix VIMAGE build. 2014-12-25 13:38:51 +00:00
netnatm
netpfil pf(4) needs to have a correct checksum during its processing. 2014-11-19 13:31:08 +00:00
netsmb
nfs Remove the old NFS client and server from head, 2014-12-23 00:47:46 +00:00
nfsclient Remove the old NFS client and server from head, 2014-12-23 00:47:46 +00:00
nfsserver Remove the old NFS client and server from head, 2014-12-23 00:47:46 +00:00
nlm Avoid dynamic syscall overhead for statically compiled modules. 2014-10-26 19:42:44 +00:00
ofed Make sure callbacks being freed are not pending when the 2014-12-11 10:47:50 +00:00
opencrypto Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
pc98 This configuration file removes several debugging options, including 2014-12-02 19:55:43 +00:00
powerpc Use FDT properties to identify a PS3 if present. 2015-01-05 01:05:35 +00:00
rpc Add facility to stop all userspace processes. The supposed use of the 2014-12-13 16:18:29 +00:00
security Adjust printf format specifiers for dev_t and ino_t in kernel. 2014-12-17 07:27:19 +00:00
sparc64 This configuration file removes several debugging options, including 2014-12-02 19:55:43 +00:00
sys To ease changes to underlying mbuf structure and the mbuf allocator, reduce 2015-01-05 09:58:32 +00:00
teken mdoc: improvements to SEE ALSO. 2014-12-27 07:07:37 +00:00
tools Allow the make_dtb script to work outside of a "make buildkernel" context 2014-08-30 22:39:15 +00:00
ufs Handle MAKEENTRY cnp flag in the VOP_CREATE(). Curiously, some 2014-12-21 13:29:33 +00:00
vm Eliminate a stale debug message. The per-CPU cache locks were replaced 2014-12-31 17:44:57 +00:00
x86 Fix warning about possible use of uninitialized variable. 2015-01-02 08:42:44 +00:00
xdr
xen xen: convert the Grant-table code to a NewBus device 2014-12-10 11:35:41 +00:00
Makefile Remove "pci" from CSCOPEDIRS. 2014-09-23 06:32:19 +00:00