1BIO_COPY_KERN(9)                 The Linux VFS                BIO_COPY_KERN(9)
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NAME

6       bio_copy_kern - copy kernel address into bio
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SYNOPSIS

9       struct bio * bio_copy_kern(struct request_queue * q, void * data,
10                                  unsigned int len, gfp_t gfp_mask,
11                                  int reading);
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ARGUMENTS

14       q
15           the struct request_queue for the bio
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17       data
18           pointer to buffer to copy
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20       len
21           length in bytes
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23       gfp_mask
24           allocation flags for bio and page allocation
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26       reading
27           data direction is READ
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DESCRIPTION

30       copy the kernel address into a bio suitable for io to a block device.
31       Returns an error pointer in case of error.
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34Kernel Hackers Manual 3.10         June 2019                  BIO_COPY_KERN(9)
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