From: Jeff Layton <jlayton@kernel.org>
Date: Tue, 23 Nov 2021 07:30:38 -0500
Subject: ceph: initialize i_size variable in ceph_sync_read
Git-commit: e485d028bb1075d6167558b47f63e10713ad2034
Patch-mainline: v5.16-rc6
References: jsc#SES-1880

Newer compilers seem to determine that this variable being uninitialized
isn't a problem, but older compilers (from the RHEL8 era) seem to choke
on it and complain that it could be used uninitialized.

Go ahead and initialize the variable at declaration time to silence
potential compiler warnings.

Fixes: c3d8e0b5de48 ("ceph: return the real size read when it hits EOF")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Luis Henriques <lhenriques@suse.com>
---
 fs/ceph/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 02a0a0fd9ccd..b24442e27e4e 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -847,7 +847,7 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
 	ssize_t ret;
 	u64 off = iocb->ki_pos;
 	u64 len = iov_iter_count(to);
-	u64 i_size;
+	u64 i_size = i_size_read(inode);
 
 	dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len,
 	     (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");