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| author | Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> | 2018-03-30 09:20:59 +0900 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-03-30 22:50:15 +0200 |
| commit | f385178679b6561d2e717567d12e07c7f927ee59 (patch) | |
| tree | 97578ab32a6848feb7f29972f58753febe01d0ce /lib | |
| parent | 1379ef828a18d8f81c526b25e4d5685caa2cfd65 (diff) | |
| download | linux-f385178679b6561d2e717567d12e07c7f927ee59.tar.bz2 | |
lib/scatterlist: add sg_init_marker() helper
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>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/scatterlist.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 53728d391d3a..06dad7a072fd 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -132,14 +132,7 @@ EXPORT_SYMBOL(sg_last); void sg_init_table(struct scatterlist *sgl, unsigned int nents) { memset(sgl, 0, sizeof(*sgl) * nents); -#ifdef CONFIG_DEBUG_SG - { - unsigned int i; - for (i = 0; i < nents; i++) - sgl[i].sg_magic = SG_MAGIC; - } -#endif - sg_mark_end(&sgl[nents - 1]); + sg_init_marker(sgl, nents); } EXPORT_SYMBOL(sg_init_table); |