1KFIFO_TO_USER(9)                  FIFO Buffer                 KFIFO_TO_USER(9)
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NAME

6       kfifo_to_user - gets data from the FIFO and write it to user space
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SYNOPSIS

9       int kfifo_to_user(struct kfifo * fifo, void __user * to,
10                         unsigned int len, unsigned * lenout);
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ARGUMENTS

13       fifo
14           the fifo to be used.
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16       to
17           where the data must be copied.
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19       len
20           the size of the destination buffer.
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22       lenout
23           pointer to output variable with copied data
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DESCRIPTION

26       This function copies at most len bytes from the FIFO into the to buffer
27       and 0 or -EFAULT.
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29       Note that with only one concurrent reader and one concurrent writer,
30       you don't need extra locking to use these functions.
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33Kernel Hackers Manual 2.6.       November 2011                KFIFO_TO_USER(9)
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