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| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-10 15:51:28 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-02-04 01:34:16 -0500 |
| commit | ba7438aed924133df54a60e4cd5499d359bcf2a8 (patch) | |
| tree | e29c9a26421611c374667b022c9904ab527c496f /lib | |
| parent | 98a527aac1eb198dbc4405b800e102563ed8e4dd (diff) | |
| download | lwn-ba7438aed924133df54a60e4cd5499d359bcf2a8.tar.gz lwn-ba7438aed924133df54a60e4cd5499d359bcf2a8.zip | |
vhost: don't bother copying iovecs in handle_rx(), kill memcpy_toiovecend()
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: kvm@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/iovec.c | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/lib/iovec.c b/lib/iovec.c index 4a90875c64ae..d8f17a9b1ccf 100644 --- a/lib/iovec.c +++ b/lib/iovec.c @@ -3,32 +3,6 @@ #include <linux/uio.h> /* - * Copy kernel to iovec. Returns -EFAULT on error. - */ - -int memcpy_toiovecend(const struct iovec *iov, unsigned char *kdata, - int offset, int len) -{ - int copy; - for (; len > 0; ++iov) { - /* Skip over the finished iovecs */ - if (unlikely(offset >= iov->iov_len)) { - offset -= iov->iov_len; - continue; - } - copy = min_t(unsigned int, iov->iov_len - offset, len); - if (copy_to_user(iov->iov_base + offset, kdata, copy)) - return -EFAULT; - offset = 0; - kdata += copy; - len -= copy; - } - - return 0; -} -EXPORT_SYMBOL(memcpy_toiovecend); - -/* * Copy iovec to kernel. Returns -EFAULT on error. */ |