diff options
Diffstat (limited to 'Documentation/RCU/whatisRCU.txt')
| -rw-r--r-- | Documentation/RCU/whatisRCU.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt index 88dfce182f66..16622c9e86b5 100644 --- a/Documentation/RCU/whatisRCU.txt +++ b/Documentation/RCU/whatisRCU.txt | |||
| @@ -256,7 +256,9 @@ rcu_dereference() | |||
| 256 | If you are going to be fetching multiple fields from the | 256 | If you are going to be fetching multiple fields from the |
| 257 | RCU-protected structure, using the local variable is of | 257 | RCU-protected structure, using the local variable is of |
| 258 | course preferred. Repeated rcu_dereference() calls look | 258 | course preferred. Repeated rcu_dereference() calls look |
| 259 | ugly and incur unnecessary overhead on Alpha CPUs. | 259 | ugly, do not guarantee that the same pointer will be returned |
| 260 | if an update happened while in the critical section, and incur | ||
| 261 | unnecessary overhead on Alpha CPUs. | ||
| 260 | 262 | ||
| 261 | Note that the value returned by rcu_dereference() is valid | 263 | Note that the value returned by rcu_dereference() is valid |
| 262 | only within the enclosing RCU read-side critical section. | 264 | only within the enclosing RCU read-side critical section. |