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[75.142.250.213]) by smtp.gmail.com with ESMTPSA id d53sm16474232qtc.47.2020.07.05.07.21.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Jul 2020 07:21:05 -0700 (PDT) From: trix@redhat.com To: clm@fb.com, josef@toxicpanda.com, dsterba@suse.com Cc: linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, Tom Rix Subject: [PATCH] btfrs: initialize return of btrfs_extent_same Date: Sun, 5 Jul 2020 07:20:58 -0700 Message-Id: <20200705142058.28305-1-trix@redhat.com> X-Mailer: git-send-email 2.18.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tom Rix clang static analysis flags a garbage return fs/btrfs/reflink.c:611:2: warning: Undefined or garbage value returned to caller [core.uninitialized.UndefReturn] return ret; ^~~~~~~~~~ ret will not be set when olen is 0 When olen is 0, this function does no work. So initialize ret to 0 Signed-off-by: Tom Rix --- fs/btrfs/reflink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/reflink.c b/fs/btrfs/reflink.c index 040009d1cc31..200a80fcbecb 100644 --- a/fs/btrfs/reflink.c +++ b/fs/btrfs/reflink.c @@ -572,7 +572,7 @@ static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 len, static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen, struct inode *dst, u64 dst_loff) { - int ret; + int ret = 0; u64 i, tail_len, chunk_count; struct btrfs_root *root_dst = BTRFS_I(dst)->root; -- 2.18.1