percpu-rw-semaphore: fix documentation typos
One more patch for this thing, fixing some typos in the documentation.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/Documentation/percpu-rw-semaphore.txt b/Documentation/percpu-rw-semaphore.txt
index eddd770..7d3c824 100644
--- a/Documentation/percpu-rw-semaphore.txt
+++ b/Documentation/percpu-rw-semaphore.txt
@@ -9,10 +9,10 @@
is bouncing between L1 caches of the cores, causing performance
degradation.
-Locking for reading it very fast, it uses RCU and it avoids any atomic
+Locking for reading is very fast, it uses RCU and it avoids any atomic
instruction in the lock and unlock path. On the other hand, locking for
writing is very expensive, it calls synchronize_rcu() that can take
-hundreds of microseconds.
+hundreds of milliseconds.
The lock is declared with "struct percpu_rw_semaphore" type.
The lock is initialized percpu_init_rwsem, it returns 0 on success and
