On Mon, Jan 25, 2021 at 09:55:32AM +1100, Stephen Rothwell wrote:
> Hi all,
>
> After merging the xfs tree, today's linux-next build (powerpc
> ppc64_defconfig) produced this warning:
>
> fs/xfs/xfs_log.c: In function 'xfs_log_cover':
> fs/xfs/xfs_log.c:1111:16: warning: unused variable 'log' [-Wunused-variable]
> 1111 | struct xlog *log = mp->m_log;
> | ^~~
>
> Introduced by commit
>
> 303591a0a947 ("xfs: cover the log during log quiesce")
>
Oops, patch below. Feel free to apply or squash into the original
commit.
Brian
--- 8< ---
>From 6078f06e2bd4c82111a85a2032c39a56654b0be6 Mon Sep 17 00:00:00 2001
From: Brian Foster <bfoster@xxxxxxxxxx>
Date: Mon, 25 Jan 2021 08:22:56 -0500
Subject: [PATCH] xfs: fix unused log variable in xfs_log_cover()
The log variable is only used in kernels with asserts enabled.
Remove it and open code the dereference to avoid unused variable
warnings.
Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx>
---
fs/xfs/xfs_log.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 58699881c100..d8b814227734 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1108,12 +1108,11 @@ static int
xfs_log_cover(
struct xfs_mount *mp)
{
- struct xlog *log = mp->m_log;
int error = 0;
bool need_covered;
- ASSERT((xlog_cil_empty(log) && xlog_iclogs_empty(log) &&
- !xfs_ail_min_lsn(log->l_ailp)) ||
+ ASSERT((xlog_cil_empty(mp->m_log) && xlog_iclogs_empty(mp->m_log) &&
+ !xfs_ail_min_lsn(mp->m_log->l_ailp)) ||
XFS_FORCED_SHUTDOWN(mp));
if (!xfs_log_writable(mp))
--
2.26.2
