linux/Documentation/RCU
Paul E. McKenney ed2bec07fd documentation: Record reason for rcu_head two-byte alignment
There is an assertion in __call_rcu() that checks only the bottom
bit of the rcu_head pointer, rather than the bottom two (as might be
expected for 32-bit systems) or the bottom three (as might be expected
for 64-bit systems).  This choice might be a bit surprising in these days
of ubiquitous 32-bit and 64-bit systems.  This commit therefore records
the reason for this odd alignment check, namely that m68k guarantees
only two-byte alignment despite being a 32-bit architectures.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2016-08-22 09:25:33 -07:00
..
Design documentation: Record reason for rcu_head two-byte alignment 2016-08-22 09:25:33 -07:00
00-INDEX documentation: Record rcu_dereference() value mishandling 2014-04-29 08:38:33 -07:00
arrayRCU.txt documentation: RCU-protected array indexes no longer supported 2015-05-27 12:56:17 -07:00
checklist.txt documentation: Record rcu_dereference() value mishandling 2014-04-29 08:38:33 -07:00
listRCU.txt rcu: Update docs to include kfree_rcu() 2012-11-08 11:44:25 -08:00
lockdep-splat.txt rcu: Document interpretation of RCU-lockdep splats 2011-09-28 21:38:28 -07:00
lockdep.txt documentation: RCU-protected array indexes no longer supported 2015-05-27 12:56:17 -07:00
NMI-RCU.txt rcu: Fix RCU's NMI documentation 2011-09-28 21:36:44 -07:00
rcu_dereference.txt documentation: Fix spelling of "operators" 2015-07-15 14:43:10 -07:00
rcu.txt rcu: Remove redundant TREE_PREEMPT_RCU config option 2014-10-29 10:20:05 -07:00
rcubarrier.txt rcu: Fix rcu_barrier() documentation 2013-08-18 17:05:32 -07:00
rculist_nulls.txt netfilter: nf_conntrack: nf_conntrack_alloc() fixes 2009-07-16 14:03:40 +02:00
rcuref.txt documentation: Add pointer to percpu-ref for RCU and refcount 2014-07-08 08:32:56 -07:00
RTFP.txt Documentation: fix common spelling mistakes 2016-04-28 07:51:59 -06:00
stallwarn.txt Documentation: Fix spelling mistake 2016-06-14 16:01:00 -07:00
torture.txt rcutorture: Remove outdated config option description 2016-08-22 09:23:23 -07:00
trace.txt rcu: Remove expedited GP funnel-lock bypass 2016-03-31 13:34:07 -07:00
UP.txt rcu: Add synchronize_sched_expedited() rcutorture doc + updates 2009-07-03 10:02:29 +02:00
whatisRCU.txt documentation: Add references to 2010 and 2014 Big API Tables 2016-06-14 16:00:58 -07:00