* [PATCH] net: ceph: mark expected switch fall-throughs
@ 2017-10-15 17:55 Gustavo A. R. Silva
2017-10-16 9:25 ` Ilya Dryomov
0 siblings, 1 reply; 2+ messages in thread
From: Gustavo A. R. Silva @ 2017-10-15 17:55 UTC (permalink / raw)
To: Ilya Dryomov, Yan, Zheng, Sage Weil, David S. Miller
Cc: ceph-devel, netdev, linux-kernel, Gustavo A. R. Silva
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
---
net/ceph/ceph_hash.c | 12 +++++++++++-
net/ceph/messenger.c | 1 +
net/ceph/mon_client.c | 1 +
3 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/net/ceph/ceph_hash.c b/net/ceph/ceph_hash.c
index 67bb1f1..9a5850f2 100644
--- a/net/ceph/ceph_hash.c
+++ b/net/ceph/ceph_hash.c
@@ -47,28 +47,38 @@ unsigned int ceph_str_hash_rjenkins(const char *str, unsigned int length)
/* handle the last 11 bytes */
c = c + length;
- switch (len) { /* all the case statements fall through */
+ switch (len) {
case 11:
c = c + ((__u32)k[10] << 24);
+ /* fall through */
case 10:
c = c + ((__u32)k[9] << 16);
+ /* fall through */
case 9:
c = c + ((__u32)k[8] << 8);
/* the first byte of c is reserved for the length */
+ /* fall through */
case 8:
b = b + ((__u32)k[7] << 24);
+ /* fall through */
case 7:
b = b + ((__u32)k[6] << 16);
+ /* fall through */
case 6:
b = b + ((__u32)k[5] << 8);
+ /* fall through */
case 5:
b = b + k[4];
+ /* fall through */
case 4:
a = a + ((__u32)k[3] << 24);
+ /* fall through */
case 3:
a = a + ((__u32)k[2] << 16);
+ /* fall through */
case 2:
a = a + ((__u32)k[1] << 8);
+ /* fall through */
case 1:
a = a + k[0];
/* case 0: nothing left to add */
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index a67298c..73dac9d 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -429,6 +429,7 @@ static void ceph_sock_state_change(struct sock *sk)
switch (sk->sk_state) {
case TCP_CLOSE:
dout("%s TCP_CLOSE\n", __func__);
+ /* fall through */
case TCP_CLOSE_WAIT:
dout("%s TCP_CLOSE_WAIT\n", __func__);
con_sock_state_closing(con);
diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index 63edc6e..b97c047 100644
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -1281,6 +1281,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
* request had a non-zero tid. Workaround this weirdness
* by falling through to the allocate case.
*/
+ /* fall through */
case CEPH_MSG_MON_MAP:
case CEPH_MSG_MDS_MAP:
case CEPH_MSG_OSD_MAP:
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] net: ceph: mark expected switch fall-throughs
2017-10-15 17:55 [PATCH] net: ceph: mark expected switch fall-throughs Gustavo A. R. Silva
@ 2017-10-16 9:25 ` Ilya Dryomov
0 siblings, 0 replies; 2+ messages in thread
From: Ilya Dryomov @ 2017-10-16 9:25 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Yan, Zheng, Sage Weil, David S. Miller, Ceph Development, netdev,
linux-kernel
On Sun, Oct 15, 2017 at 7:55 PM, Gustavo A. R. Silva
<garsilva@embeddedor.com> wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
> where we are expecting to fall through.
>
> Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
> ---
> net/ceph/ceph_hash.c | 12 +++++++++++-
> net/ceph/messenger.c | 1 +
> net/ceph/mon_client.c | 1 +
> 3 files changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/net/ceph/ceph_hash.c b/net/ceph/ceph_hash.c
> index 67bb1f1..9a5850f2 100644
> --- a/net/ceph/ceph_hash.c
> +++ b/net/ceph/ceph_hash.c
> @@ -47,28 +47,38 @@ unsigned int ceph_str_hash_rjenkins(const char *str, unsigned int length)
>
> /* handle the last 11 bytes */
> c = c + length;
> - switch (len) { /* all the case statements fall through */
> + switch (len) {
> case 11:
> c = c + ((__u32)k[10] << 24);
> + /* fall through */
> case 10:
> c = c + ((__u32)k[9] << 16);
> + /* fall through */
> case 9:
> c = c + ((__u32)k[8] << 8);
> /* the first byte of c is reserved for the length */
> + /* fall through */
> case 8:
> b = b + ((__u32)k[7] << 24);
> + /* fall through */
> case 7:
> b = b + ((__u32)k[6] << 16);
> + /* fall through */
> case 6:
> b = b + ((__u32)k[5] << 8);
> + /* fall through */
> case 5:
> b = b + k[4];
> + /* fall through */
> case 4:
> a = a + ((__u32)k[3] << 24);
> + /* fall through */
> case 3:
> a = a + ((__u32)k[2] << 16);
> + /* fall through */
> case 2:
> a = a + ((__u32)k[1] << 8);
> + /* fall through */
> case 1:
> a = a + k[0];
> /* case 0: nothing left to add */
> diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
> index a67298c..73dac9d 100644
> --- a/net/ceph/messenger.c
> +++ b/net/ceph/messenger.c
> @@ -429,6 +429,7 @@ static void ceph_sock_state_change(struct sock *sk)
> switch (sk->sk_state) {
> case TCP_CLOSE:
> dout("%s TCP_CLOSE\n", __func__);
> + /* fall through */
> case TCP_CLOSE_WAIT:
> dout("%s TCP_CLOSE_WAIT\n", __func__);
> con_sock_state_closing(con);
> diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
> index 63edc6e..b97c047 100644
> --- a/net/ceph/mon_client.c
> +++ b/net/ceph/mon_client.c
> @@ -1281,6 +1281,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
> * request had a non-zero tid. Workaround this weirdness
> * by falling through to the allocate case.
> */
> + /* fall through */
> case CEPH_MSG_MON_MAP:
> case CEPH_MSG_MDS_MAP:
> case CEPH_MSG_OSD_MAP:
Applied.
Thanks,
Ilya
^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-10-15 17:55 [PATCH] net: ceph: mark expected switch fall-throughs Gustavo A. R. Silva
2017-10-16 9:25 ` Ilya Dryomov
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