On Tue, May 23, 2023 at 9:53 AM Guoqing Jiang <guoqing.jiang@xxxxxxxxx> wrote:
>
> Add one new array (marked with __maybe_unused to prevent gcc warning about
> "defined but not used" with W=1), then we can remove rnbd_access_mode_str
> and rnbd-common.c accordingly.
>
> Signed-off-by: Guoqing Jiang <guoqing.jiang@xxxxxxxxx>
> ---
> drivers/block/rnbd/Makefile | 6 ++----
> drivers/block/rnbd/rnbd-clt-sysfs.c | 4 ++--
> drivers/block/rnbd/rnbd-common.c | 23 -----------------------
> drivers/block/rnbd/rnbd-proto.h | 9 +++++++++
> drivers/block/rnbd/rnbd-srv-sysfs.c | 2 +-
> drivers/block/rnbd/rnbd-srv.c | 4 ++--
> 6 files changed, 16 insertions(+), 32 deletions(-)
> delete mode 100644 drivers/block/rnbd/rnbd-common.c
>
> diff --git a/drivers/block/rnbd/Makefile b/drivers/block/rnbd/Makefile
> index 40b31630822c..208e5f865497 100644
> --- a/drivers/block/rnbd/Makefile
> +++ b/drivers/block/rnbd/Makefile
> @@ -3,13 +3,11 @@
> ccflags-y := -I$(srctree)/drivers/infiniband/ulp/rtrs
>
> rnbd-client-y := rnbd-clt.o \
> - rnbd-clt-sysfs.o \
> - rnbd-common.o
> + rnbd-clt-sysfs.o
>
> CFLAGS_rnbd-srv-trace.o = -I$(src)
>
> -rnbd-server-y := rnbd-common.o \
> - rnbd-srv.o \
> +rnbd-server-y := rnbd-srv.o \
> rnbd-srv-sysfs.o \
> rnbd-srv-trace.o
>
> diff --git a/drivers/block/rnbd/rnbd-clt-sysfs.c b/drivers/block/rnbd/rnbd-clt-sysfs.c
> index 8c6087949794..a0b49a0c0bdd 100644
> --- a/drivers/block/rnbd/rnbd-clt-sysfs.c
> +++ b/drivers/block/rnbd/rnbd-clt-sysfs.c
> @@ -278,7 +278,7 @@ static ssize_t access_mode_show(struct kobject *kobj,
>
> dev = container_of(kobj, struct rnbd_clt_dev, kobj);
>
> - return sysfs_emit(page, "%s\n", rnbd_access_mode_str(dev->access_mode));
> + return sysfs_emit(page, "%s\n", rnbd_access_modes[dev->access_mode].str);
> }
>
> static struct kobj_attribute rnbd_clt_access_mode =
> @@ -596,7 +596,7 @@ static ssize_t rnbd_clt_map_device_store(struct kobject *kobj,
>
> pr_info("Mapping device %s on session %s, (access_mode: %s, nr_poll_queues: %d)\n",
> pathname, sessname,
> - rnbd_access_mode_str(access_mode),
> + rnbd_access_modes[access_mode].str,
> nr_poll_queues);
>
> dev = rnbd_clt_map_device(sessname, paths, path_cnt, port_nr, pathname,
> diff --git a/drivers/block/rnbd/rnbd-common.c b/drivers/block/rnbd/rnbd-common.c
> deleted file mode 100644
> index 596c3f732403..000000000000
> --- a/drivers/block/rnbd/rnbd-common.c
> +++ /dev/null
> @@ -1,23 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-or-later
> -/*
> - * RDMA Network Block Driver
> - *
> - * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
> - * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
> - * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
> - */
> -#include "rnbd-proto.h"
> -
> -const char *rnbd_access_mode_str(enum rnbd_access_mode mode)
> -{
> - switch (mode) {
> - case RNBD_ACCESS_RO:
> - return "ro";
> - case RNBD_ACCESS_RW:
> - return "rw";
> - case RNBD_ACCESS_MIGRATION:
> - return "migration";
> - default:
> - return "unknown";
> - }
> -}
> diff --git a/drivers/block/rnbd/rnbd-proto.h b/drivers/block/rnbd/rnbd-proto.h
> index 84fd69844b7d..185e24eaf2bf 100644
> --- a/drivers/block/rnbd/rnbd-proto.h
> +++ b/drivers/block/rnbd/rnbd-proto.h
> @@ -61,6 +61,15 @@ enum rnbd_access_mode {
> RNBD_ACCESS_MIGRATION,
> };
>
> +static const __maybe_unused struct {
> + int mode;
why not enum rnbd_access_mode?
> + const char *str;
> +} rnbd_access_modes[] = {
> + [RNBD_ACCESS_RO] = {RNBD_ACCESS_RO, "ro"},
> + [RNBD_ACCESS_RW] = {RNBD_ACCESS_RW, "rw"},
> + [RNBD_ACCESS_MIGRATION] = {RNBD_ACCESS_MIGRATION, "migration"},
> +};
> +
> /**
> * struct rnbd_msg_sess_info - initial session info from client to server
> * @hdr: message header
> diff --git a/drivers/block/rnbd/rnbd-srv-sysfs.c b/drivers/block/rnbd/rnbd-srv-sysfs.c
> index 9fe7d9e0ab63..4962826e9639 100644
> --- a/drivers/block/rnbd/rnbd-srv-sysfs.c
> +++ b/drivers/block/rnbd/rnbd-srv-sysfs.c
> @@ -103,7 +103,7 @@ static ssize_t access_mode_show(struct kobject *kobj,
> sess_dev = container_of(kobj, struct rnbd_srv_sess_dev, kobj);
>
> return sysfs_emit(page, "%s\n",
> - rnbd_access_mode_str(sess_dev->access_mode));
> + rnbd_access_modes[sess_dev->access_mode].str);
> }
>
> static struct kobj_attribute rnbd_srv_dev_session_access_mode_attr =
> diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
> index 2cfed2e58d64..e9ef6bd4b50c 100644
> --- a/drivers/block/rnbd/rnbd-srv.c
> +++ b/drivers/block/rnbd/rnbd-srv.c
> @@ -483,7 +483,7 @@ static int rnbd_srv_check_update_open_perm(struct rnbd_srv_dev *srv_dev,
> pr_err("Mapping device '%s' for session %s with RW permissions failed. Device already opened as 'RW' by %d client(s), access mode %s.\n",
> srv_dev->id, srv_sess->sessname,
> srv_dev->open_write_cnt,
> - rnbd_access_mode_str(access_mode));
> + rnbd_access_modes[access_mode].str);
> }
> break;
> case RNBD_ACCESS_MIGRATION:
> @@ -494,7 +494,7 @@ static int rnbd_srv_check_update_open_perm(struct rnbd_srv_dev *srv_dev,
> pr_err("Mapping device '%s' for session %s with migration permissions failed. Device already opened as 'RW' by %d client(s), access mode %s.\n",
> srv_dev->id, srv_sess->sessname,
> srv_dev->open_write_cnt,
> - rnbd_access_mode_str(access_mode));
> + rnbd_access_modes[access_mode].str);
> }
> break;
> default:
> --
> 2.35.3
>
