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authorCorey Minyard <minyard@acm.org>2007-02-10 01:45:45 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 10:51:31 -0800
commit78ba2faf71c63990cba9997f18cf1d610e06e3f2 (patch)
tree8cf435b8ade77c358dc3c4cc6a3349d65702170f /drivers/atm
parent3678d62f028689abc8ac5693b254e48f605f94ba (diff)
[PATCH] IPMI: Fix some RCU problems
Fix some RCU problem pointed out by Paul McKenney of IBM. These are: The wholesale move of the command receivers list into a new list was not safe because the list will point to the new tail during a traversal, so the traversal will never end on a reader if this happens during a read. Memory barriers were needed to handle proper ordering of the setting of the IPMI interface as valid. Readers might not see proper ordering of data otherwise. In ipmi_smi_watcher_register(), the use of the _rcu suffix on the list is unnecessary. This require the list_splice_init_rcu() patch previously posted. Signed-off-by: Corey Minyard <minyard@acm.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/atm')
0 files changed, 0 insertions, 0 deletions