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authorPrashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>2018-03-30 09:20:59 +0900
committerDaniel Borkmann <daniel@iogearbox.net>2018-03-30 22:50:15 +0200
commitf385178679b6561d2e717567d12e07c7f927ee59 (patch)
tree97578ab32a6848feb7f29972f58753febe01d0ce /lib
parent1379ef828a18d8f81c526b25e4d5685caa2cfd65 (diff)
downloadlinux-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.c9
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);