Staging: comedi: Use mutex instead of semaphore in usbduxsigma.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 22:04:22 +02:00 • committed by Greg Kroah-Hartman

parent 851f7c0e62

commit 4e719935ea

1 changed files with 35 additions and 35 deletions

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drivers/staging/comedi/drivers/usbduxsigma.c

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