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percpu-rw-semaphore: fix documentation typos

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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>
This commit is contained in:
Mikulas Patocka 2012-09-26 19:56:15 +02:00 committed by Jens Axboe
parent 3eab7315c8
commit e6b5c0822b
1 changed files with 2 additions and 2 deletions
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4
Documentation/percpu-rw-semaphore.txt
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@ -9,10 +9,10 @@ cores take the lock for reading, the cache line containing the semaphore
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