Hi,
I am trying to use semaphore for locking. Following is the piece of code I am using :
struct semaphore mr_sem;
sema_init(&mr_sem, 1); /* usage count is 1 */
if (down_interruptible(&mr_sem))
/* semaphore not acquired; received a signal ... */
/* critical region (semaphore acquired) ... */
up(&mr_sem);
The compilation is done using gcc with options _D__KERNEL__. It compiles properly, but the linking gives some errors regards to __down_failed_interruptible and __up_wakeup.
Do I need to specify some other options for the compilation.
Thanks for the help.
-SP