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With CONFIG_BLK_DEV_RNBD_CLIENT=m and CONFIG_BLK_DEV_RNBD_SERVER=y
(or vice versa), rnbd-common.o is linked to a module and also to
vmlinux even though CFLAGS are different between builtins and modules.

This is the same situation as fixed by commit 637a642f5ca5 ("zstd:
Fixing mixed module-builtin objects").

Turn rnbd_access_mode_str() into an inline function.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

drivers/block/rnbd/Makefile | 6 ++----
drivers/block/rnbd/rnbd-common.c | 23 -----------------------
drivers/block/rnbd/rnbd-proto.h | 14 +++++++++++++-
3 files changed, 15 insertions(+), 28 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-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 da1d0542d7e2..57afe9b07fda 100644
--- a/drivers/block/rnbd/rnbd-proto.h
+++ b/drivers/block/rnbd/rnbd-proto.h
@@ -300,6 +300,18 @@ static inline u32 rq_to_rnbd_flags(struct request *rq)
return rnbd_opf;
}

-const char *rnbd_access_mode_str(enum rnbd_access_mode mode);
+static inline 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";
+ }
+}

#endif /* RNBD_PROTO_H */
--
2.39.2