linux-ext4 - [PATCH] ext4: Convert timers to use timer

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Message-ID: <20171017000019.GA102779@beast>
Date:   Mon, 16 Oct 2017 17:00:19 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Theodore Ts'o <tytso@....edu>
Cc:     Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ext4: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: "Theodore Ts'o" <tytso@....edu>
Cc: Andreas Dilger <adilger.kernel@...ger.ca>
Cc: linux-ext4@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
Reviewed-by: Reviewed-by: Jan Kara <jack@...e.cz>
---
 fs/ext4/super.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index b5d393321b7b..759281cec51f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2793,14 +2793,11 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly)
  * This function is called once a day if we have errors logged
  * on the file system
  */
-static void print_daily_error_info(unsigned long arg)
+static void print_daily_error_info(struct timer_list *t)
 {
-	struct super_block *sb = (struct super_block *) arg;
-	struct ext4_sb_info *sbi;
-	struct ext4_super_block *es;
-
-	sbi = EXT4_SB(sb);
-	es = sbi->s_es;
+	struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report);
+	struct super_block *sb = sbi->s_sb;
+	struct ext4_super_block *es = sbi->s_es;
 
 	if (es->s_error_count)
 		/* fsck newer than v1.41.13 is needed to clean this condition. */
@@ -3982,8 +3979,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	setup_timer(&sbi->s_err_report, print_daily_error_info,
-		(unsigned long) sb);
+	timer_setup(&sbi->s_err_report, print_daily_error_info, 0);
 
 	/* Register extent status tree shrinker */
 	if (ext4_es_register_shrinker(sbi))
-- 
2.7.4


-- 
Kees Cook
Pixel Security