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(parent: 06c5c5c) | patch
scm: optimize put_cmsg()
authorEric Dumazet <edumazet@google.com>
Thu, 15 Apr 2021 17:37:53 +0000 (10:37 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 16 Apr 2021 00:03:33 +0000 (17:03 -0700)
commit49292b1d65fa30b82af6ab03928229e7de41aa92
treee374d75ffd37f3053bf687938f8596aea6988f69tree | snapshot
parent06c5c5c0ca9a77db09ad0e255a03e23a99255f30commit | diff
scm: optimize put_cmsg()

Calling two copy_to_user() for very small regions has very high overhead.

Switch to inlined unsafe_put_user() to save one stac/clac sequence,
and avoid copy_to_user().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/scm.c diff | blob | history
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