linux-kernel - [PATCH] libosd: Remove ignored _

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Message-Id: <20180930205448.26205-1-natechancellor@gmail.com>
Date:   Sun, 30 Sep 2018 13:54:48 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Boaz Harrosh <ooo@...ctrozaur.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] libosd: Remove ignored __weak attribute

Clang warns that the __weak attribute is going to be ignored on
osd_root_object because it's not in the correct location (needs to be
after the type).

./include/scsi/osd_types.h:31:21: warning: 'weak' attribute only applies
to variables, functions, and classes [-Wignored-attributes]
static const struct __weak osd_obj_id osd_root_object = {0, 0};
                    ^

Turns out that GCC ignores the attribute too albeit silently because
moving the attribute after either osd_obj_id or osd_root_object like
all other uses of __weak on variables in the kernel causes a build
error on both GCC and Clang because static variables cannot be weak
since weak definitions rely on not having internal linkage:

./include/scsi/osd_types.h:31:32: error: weak declaration cannot have
internal linkage
static const struct osd_obj_id __weak osd_root_object = {0, 0};
                               ^

Just remove the attribute because it hasn't been correct since the
initial addition of this file in commit de258bf5e638 ("[SCSI] libosd:
OSDv1 Headers").

Reported-by: Nick Desaulniers <ndesaulniers@...gle.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---
 include/scsi/osd_types.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/scsi/osd_types.h b/include/scsi/osd_types.h
index 48e8a165e136..6b6fdcafa6cc 100644
--- a/include/scsi/osd_types.h
+++ b/include/scsi/osd_types.h
@@ -28,7 +28,7 @@ struct osd_obj_id {
 	osd_id id;
 };
 
-static const struct __weak osd_obj_id osd_root_object = {0, 0};
+static const struct osd_obj_id osd_root_object = {0, 0};
 
 struct osd_attr {
 	u32 attr_page;
-- 
2.19.0