Staging: comedi: Use mutex instead of semaphore in usbdux.c

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Replace binary semaphore with mutex because mutex gives better
performance.
This change is safe because the thread that decrements the value of semaphore
is also the one that increments it, and acts like a mutex where owner of the
lock is the only one that can release the lock.

Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ksenija Stanojevic 2015-10-02 22:05:57 +02:00 • committed by Greg Kroah-Hartman

parent 4e719935ea

commit 1e5cae2f0b

1 changed files with 32 additions and 32 deletions

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drivers/staging/comedi/drivers/usbdux.c

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