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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-11-27 18:20:40 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-12-05 20:57:53 +0100 |
| commit | 9ad3c143d7d6942c66f27bc6c18f5df638f70aff (patch) | |
| tree | b0b52f72cd5d03677b2d643feaaa7220aa109f29 /Documentation/RCU/whatisRCU.txt | |
| parent | drivers/dma/ioat: Remove now-redundant smp_read_barrier_depends() (diff) | |
| download | linux-9ad3c143d7d6942c66f27bc6c18f5df638f70aff.tar.xz linux-9ad3c143d7d6942c66f27bc6c18f5df638f70aff.zip | |
doc: De-emphasize smp_read_barrier_depends
This commit keeps only the historical and low-level discussion of
smp_read_barrier_depends().
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck: Adjusted to allow for David Howells feedback on prior commit. ]
Diffstat (limited to 'Documentation/RCU/whatisRCU.txt')
| -rw-r--r-- | Documentation/RCU/whatisRCU.txt | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt index df62466da4e0..a27fbfb0efb8 100644 --- a/Documentation/RCU/whatisRCU.txt +++ b/Documentation/RCU/whatisRCU.txt @@ -600,8 +600,7 @@ don't forget about them when submitting patches making use of RCU!] #define rcu_dereference(p) \ ({ \ - typeof(p) _________p1 = p; \ - smp_read_barrier_depends(); \ + typeof(p) _________p1 = READ_ONCE(p); \ (_________p1); \ }) |