consolidate qemu_iovec_memset{,_skip}() into single function and use existing iov_memset()

This patch combines two functions into one, and replaces
the implementation with already existing iov_memset() from
iov.c.

The new prototype of qemu_iovec_memset():
  size_t qemu_iovec_memset(qiov, size_t offset, int fillc, size_t bytes)
It is different from former qemu_iovec_memset_skip(), and
I want to make other functions to be consistent with it
too: first how much to skip, second what, and 3rd how many
of it.  It also returns actual number of bytes filled in,
which may be less than the requested `bytes' if qiov is
smaller than offset+bytes, in the same way iov_memset()
does.

While at it, use utility function iov_memset() from
iov.h in posix-aio-compat.c, where qiov was used.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

1 files changed, 2 insertions, 2 deletions

diff --git a/linux-aio.c b/linux-aio.c
index fa0fbf34aa..ce9b5d4be8 100644
--- a/linux-aio.c
+++ b/linux-aio.c
@@ -63,8 +63,8 @@ static void qemu_laio_process_completion(struct qemu_laio_state *s,
         } else if (ret >= 0) {
             /* Short reads mean EOF, pad with zeros. */
             if (laiocb->is_read) {
-                qemu_iovec_memset_skip(laiocb->qiov, 0,
-                    laiocb->qiov->size - ret, ret);
+                qemu_iovec_memset(laiocb->qiov, ret, 0,
+                    laiocb->qiov->size - ret);
             } else {
                 ret = -EINVAL;
             }