linux-ext4 - [PATCH] fs/ext4/super.c : fix two compile errors

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Date:   Wed, 26 Apr 2023 22:20:17 +0100
From:   Chris Clayton <chris2553@...glemail.com>
To:     "tytso@....edu >> Theodore Y. Ts'o" <tytso@....edu>,
        yanaijie@...wei.com, linux-ext4@...r.kernel.org
Subject: [PATCH] fs/ext4/super.c : fix two compile errors

dcbf87589d90 results in 2 build errors in fs/ext4/super.c because, in both affected
functions, a variable is left unused if CONFIG_QUOTA is not defined. The patch
below fixes this. It is compile tested only.

...
  CC      fs/ext4/super.o
fs/ext4/super.c: In function 'ext4_put_super':
fs/ext4/super.c:1262:13: error: unused variable 'i' [-Werror=unused-variable]
 1262 |         int i, err;
      |             ^
fs/ext4/super.c: In function '__ext4_fill_super':
fs/ext4/super.c:5200:22: error: unused variable 'i' [-Werror=unused-variable]
 5200 |         unsigned int i;
      |                      ^
cc1: all warnings being treated as errors
...

Fixes:  dcbf87589d90 (ext4: factor out ext4_flex_groups_free())
Signed-off-by: Chris Clayton <chris2553@...glemail.com>

--- linux.git/fs/ext4/super.c.orig      2023-04-26 21:36:22.624283246 +0100
+++ linux.git/fs/ext4/super.c   2023-04-26 21:38:52.888289558 +0100
@@ -1259,7 +1259,10 @@ static void ext4_put_super(struct super_
        struct ext4_sb_info *sbi = EXT4_SB(sb);
        struct ext4_super_block *es = sbi->s_es;
        int aborted = 0;
-       int i, err;
+#ifdef CONFIG_QUOTA
+       int i;
+#endif
+       int err;

        /*
         * Unregister sysfs before destroying jbd2 journal.
@@ -5197,7 +5200,9 @@ static int __ext4_fill_super(struct fs_c
        ext4_fsblk_t logical_sb_block;
        struct inode *root;
        int ret = -ENOMEM;
+#ifdef CONFIG_QUOTA
        unsigned int i;
+#endif
        int needs_recovery;
        int err = 0;
        ext4_group_t first_not_zeroed;