Commit e6b5c082 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Jens Axboe
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percpu-rw-semaphore: fix documentation typos



One more patch for this thing, fixing some typos in the documentation.
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 3eab7315
......@@ -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
......
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