[PATCH] xfs, proc: hide unused xfs procfs helpers

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These two functions now trigger a warning when CONFIG_PROC_FS is disabled:

fs/xfs/xfs_stats.c:128:12: error: 'xqmstat_proc_show' defined but not used [-Werror=unused-function]
 static int xqmstat_proc_show(struct seq_file *m, void *v)
            ^~~~~~~~~~~~~~~~~
fs/xfs/xfs_stats.c:118:12: error: 'xqm_proc_show' defined but not used [-Werror=unused-function]
 static int xqm_proc_show(struct seq_file *m, void *v)
            ^~~~~~~~~~~~~

Previously, they were referenced from an unused 'static const' structure,
which is silently dropped by gcc.

We can address the warning by adding the same #ifdef around them that
hides the reference.

Fixes: 3f3942aca6da ("proc: introduce proc_create_single{,_data}")
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
The warning was caused by a patch in Al's VFS tree, so the fix
needs to go through the same one.
---
 fs/xfs/xfs_stats.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c
index 04762a72e344..1cc79907b377 100644
--- a/fs/xfs/xfs_stats.c
+++ b/fs/xfs/xfs_stats.c
@@ -113,6 +113,7 @@ void xfs_stats_clearall(struct xfsstats __percpu *stats)
 	}
 }
 
+#ifdef CONFIG_PROC_FS
 /* legacy quota interfaces */
 #ifdef CONFIG_XFS_QUOTA
 static int xqm_proc_show(struct seq_file *m, void *v)
@@ -137,7 +138,6 @@ static int xqmstat_proc_show(struct seq_file *m, void *v)
 }
 #endif /* CONFIG_XFS_QUOTA */
 
-#ifdef CONFIG_PROC_FS
 int
 xfs_init_procfs(void)
 {
-- 
2.9.0

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