lib/scatterlist: add sg_init_marker() helper

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sg_init_marker initializes sg_magic in the sg table and calls
sg_mark_end() on the last entry of the table. This can be useful to
avoid memset in sg_init_table() when scatterlist is already zeroed out

For example: when scatterlist is embedded inside other struct and that
container struct is zeroed out

Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Prashant Bhole 2018-03-30 09:20:59 +09:00 • committed by Daniel Borkmann

parent 1379ef828a

commit f385178679

2 changed files with 19 additions and 8 deletions

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18

include/linux/scatterlist.h

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