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| author | Paul E. McKenney <paulmck@us.ibm.com> | 2006-02-01 03:06:42 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-01 08:53:25 -0800 |
| commit | d19720a909b4443f78cbb03f4f090180e143ad9d (patch) | |
| tree | 56e579612d82f4b30d5cb943df1079b0b5f4700a /Documentation/RCU/checklist.txt | |
| parent | 53d8be5c144ece5d48745810b14248968e73eaf2 (diff) | |
| download | lwn-d19720a909b4443f78cbb03f4f090180e143ad9d.tar.gz lwn-d19720a909b4443f78cbb03f4f090180e143ad9d.zip | |
[PATCH] RCU documentation fixes (January 2006 update)
Updates to in-tree RCU documentation based on comments over the past few
months.
Signed-off-by: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/RCU/checklist.txt')
| -rw-r--r-- | Documentation/RCU/checklist.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/RCU/checklist.txt b/Documentation/RCU/checklist.txt index e118a7c1a092..49e27cc19385 100644 --- a/Documentation/RCU/checklist.txt +++ b/Documentation/RCU/checklist.txt @@ -177,3 +177,9 @@ over a rather long period of time, but improvements are always welcome! If you want to wait for some of these other things, you might instead need to use synchronize_irq() or synchronize_sched(). + +12. Any lock acquired by an RCU callback must be acquired elsewhere + with irq disabled, e.g., via spin_lock_irqsave(). Failing to + disable irq on a given acquisition of that lock will result in + deadlock as soon as the RCU callback happens to interrupt that + acquisition's critical section. |