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Date: Wed, 19 Aug 2020 09:39:14 +0200
From: Ilya Dryomov <idryomov@...il.com>
To: Jeff Layton <jlayton@...nel.org>
Cc: Miaohe Lin <linmiaohe@...wei.com>,
"David S. Miller" <davem@...emloft.net>, kuba@...nel.org,
"Alexander A. Klimov" <grandmaster@...klimov.de>,
Ceph Development <ceph-devel@...r.kernel.org>,
netdev <netdev@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] libceph: Convert to use the preferred fallthrough macro
On Tue, Aug 18, 2020 at 9:56 PM Jeff Layton <jlayton@...nel.org> wrote:
>
> On Tue, 2020-08-18 at 08:26 -0400, Miaohe Lin wrote:
> > Convert the uses of fallthrough comments to fallthrough macro.
> >
> > Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
> > ---
> > net/ceph/ceph_hash.c | 20 ++++++++++----------
> > net/ceph/crush/mapper.c | 2 +-
> > net/ceph/messenger.c | 4 ++--
> > net/ceph/mon_client.c | 2 +-
> > net/ceph/osd_client.c | 4 ++--
> > 5 files changed, 16 insertions(+), 16 deletions(-)
> >
> > diff --git a/net/ceph/ceph_hash.c b/net/ceph/ceph_hash.c
> > index 81e1e006c540..16a47c0eef37 100644
> > --- a/net/ceph/ceph_hash.c
> > +++ b/net/ceph/ceph_hash.c
> > @@ -50,35 +50,35 @@ unsigned int ceph_str_hash_rjenkins(const char *str, unsigned int length)
> > switch (len) {
> > case 11:
> > c = c + ((__u32)k[10] << 24);
> > - /* fall through */
> > + fallthrough;
> > case 10:
> > c = c + ((__u32)k[9] << 16);
> > - /* fall through */
> > + fallthrough;
> > case 9:
> > c = c + ((__u32)k[8] << 8);
> > /* the first byte of c is reserved for the length */
> > - /* fall through */
> > + fallthrough;
> > case 8:
> > b = b + ((__u32)k[7] << 24);
> > - /* fall through */
> > + fallthrough;
> > case 7:
> > b = b + ((__u32)k[6] << 16);
> > - /* fall through */
> > + fallthrough;
> > case 6:
> > b = b + ((__u32)k[5] << 8);
> > - /* fall through */
> > + fallthrough;
> > case 5:
> > b = b + k[4];
> > - /* fall through */
> > + fallthrough;
> > case 4:
> > a = a + ((__u32)k[3] << 24);
> > - /* fall through */
> > + fallthrough;
> > case 3:
> > a = a + ((__u32)k[2] << 16);
> > - /* fall through */
> > + fallthrough;
> > case 2:
> > a = a + ((__u32)k[1] << 8);
> > - /* fall through */
> > + fallthrough;
> > case 1:
> > a = a + k[0];
> > /* case 0: nothing left to add */
> > diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c
> > index 07e5614eb3f1..7057f8db4f99 100644
> > --- a/net/ceph/crush/mapper.c
> > +++ b/net/ceph/crush/mapper.c
> > @@ -987,7 +987,7 @@ int crush_do_rule(const struct crush_map *map,
> > case CRUSH_RULE_CHOOSELEAF_FIRSTN:
> > case CRUSH_RULE_CHOOSE_FIRSTN:
> > firstn = 1;
> > - /* fall through */
> > + fallthrough;
> > case CRUSH_RULE_CHOOSELEAF_INDEP:
> > case CRUSH_RULE_CHOOSE_INDEP:
> > if (wsize == 0)
> > diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
> > index 27d6ab11f9ee..bdfd66ba3843 100644
> > --- a/net/ceph/messenger.c
> > +++ b/net/ceph/messenger.c
> > @@ -412,7 +412,7 @@ static void ceph_sock_state_change(struct sock *sk)
> > switch (sk->sk_state) {
> > case TCP_CLOSE:
> > dout("%s TCP_CLOSE\n", __func__);
> > - /* fall through */
> > + fallthrough;
> > case TCP_CLOSE_WAIT:
> > dout("%s TCP_CLOSE_WAIT\n", __func__);
> > con_sock_state_closing(con);
> > @@ -2751,7 +2751,7 @@ static int try_read(struct ceph_connection *con)
> > switch (ret) {
> > case -EBADMSG:
> > con->error_msg = "bad crc/signature";
> > - /* fall through */
> > + fallthrough;
> > case -EBADE:
> > ret = -EIO;
> > break;
> > diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
> > index 3d8c8015e976..d633a0aeaa55 100644
> > --- a/net/ceph/mon_client.c
> > +++ b/net/ceph/mon_client.c
> > @@ -1307,7 +1307,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
> > * request had a non-zero tid. Work around this weirdness
> > * by allocating a new message.
> > */
> > - /* fall through */
> > + fallthrough;
> > case CEPH_MSG_MON_MAP:
> > case CEPH_MSG_MDS_MAP:
> > case CEPH_MSG_OSD_MAP:
> > diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
> > index e4fbcad6e7d8..7901ab6c79fd 100644
> > --- a/net/ceph/osd_client.c
> > +++ b/net/ceph/osd_client.c
> > @@ -3854,7 +3854,7 @@ static void scan_requests(struct ceph_osd *osd,
> > if (!force_resend && !force_resend_writes)
> > break;
> >
> > - /* fall through */
> > + fallthrough;
> > case CALC_TARGET_NEED_RESEND:
> > cancel_linger_map_check(lreq);
> > /*
> > @@ -3891,7 +3891,7 @@ static void scan_requests(struct ceph_osd *osd,
> > !force_resend_writes))
> > break;
> >
> > - /* fall through */
> > + fallthrough;
> > case CALC_TARGET_NEED_RESEND:
> > cancel_map_check(req);
> > unlink_request(osd, req);
>
>
> Looks sane. Merged into ceph-client/testing branch.
I amended this to also cover fs/ceph and rbd.
Thanks,
Ilya
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