In case of down_interruptible( ) i read following explination in understanding linux kernel.
"It is widely used by device drivers since it allows processes that receive a signal while being blocked on a semaphore to give up the "down" operation. If the sleeping process is awakened by a signal before getting the needed resource, the function increments the count field of the semaphore and returns the value -EINTR. On the other hand, if down_interruptible( ) runs to normal completion and gets the resource, it returns 0. The device driver may thus abort the I/O operation when the return value is -EINTR."
so what type of signals they are talking abt ??? and how it is implemented ??
plz explain it to me.
Thanks and Regards,
Deepak Joshi
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