Re: [2.6 patch] fs/jbd/: cleanups

[Andreas Dilger]

On Jul 19, 2005  16:15 +0200, Adrian Bunk wrote:
> This patch contains the following cleanups:
> - make needlessly global functions static
> - journal.c: remove the unused global function __journal_internal_check
>              and move the check to journal_init
> - remove the following write-only global variable:
>   - journal.c: current_journal
> - remove the following unneeded EXPORT_SYMBOL:
>   - journal.c: journal_recover
> 
> Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
Signed-off-by: Andreas Dilger <adilger@xxxxxxxxxxxxx>

> ---
> 
>  fs/jbd/journal.c    |   34 ++++++++++++++--------------------
>  fs/jbd/revoke.c     |    3 ++-
>  include/linux/jbd.h |    1 -
>  3 files changed, 16 insertions(+), 22 deletions(-)
> 
> --- linux-2.6.12-rc6-mm1-full/include/linux/jbd.h.old	2005-06-14 03:58:20.000000000 +0200
> +++ linux-2.6.12-rc6-mm1-full/include/linux/jbd.h	2005-06-14 04:00:56.000000000 +0200
> @@ -914,7 +912,6 @@
>  extern int	   journal_skip_recovery	(journal_t *);
>  extern void	   journal_update_superblock	(journal_t *, int);
>  extern void	   __journal_abort_hard	(journal_t *);
> -extern void	   __journal_abort_soft	(journal_t *, int);
>  extern void	   journal_abort      (journal_t *, int);
>  extern int	   journal_errno      (journal_t *);
>  extern void	   journal_ack_err    (journal_t *);
> --- linux-2.6.12-rc6-mm1-full/fs/jbd/revoke.c.old	2005-06-14 03:58:36.000000000 +0200
> +++ linux-2.6.12-rc6-mm1-full/fs/jbd/revoke.c	2005-06-14 03:58:41.000000000 +0200
> @@ -116,7 +116,8 @@
>  		(block << (hash_shift - 12))) & (table->hash_size - 1);
>  }
>  
> -int insert_revoke_hash(journal_t *journal, unsigned long blocknr, tid_t seq)
> +static int insert_revoke_hash(journal_t *journal, unsigned long blocknr,
> +			      tid_t seq)
>  {
>  	struct list_head *hash_list;
>  	struct jbd_revoke_record_s *record;
> 
> --- linux-2.6.13-rc3-mm1-full/fs/jbd/journal.c.old	2005-07-19 15:53:16.000000000 +0200
> +++ linux-2.6.13-rc3-mm1-full/fs/jbd/journal.c	2005-07-19 15:53:39.000000000 +0200
> @@ -65,7 +65,6 @@ EXPORT_SYMBOL(journal_set_features);
>  EXPORT_SYMBOL(journal_create);
>  EXPORT_SYMBOL(journal_load);
>  EXPORT_SYMBOL(journal_destroy);
> -EXPORT_SYMBOL(journal_recover);
>  EXPORT_SYMBOL(journal_update_superblock);
>  EXPORT_SYMBOL(journal_abort);
>  EXPORT_SYMBOL(journal_errno);
> @@ -81,6 +80,7 @@ EXPORT_SYMBOL(journal_try_to_free_buffer
>  EXPORT_SYMBOL(journal_force_commit);
>  
>  static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *);
> +static void __journal_abort_soft (journal_t *journal, int errno);
>  
>  /*
>   * Helper function used to manage commit timeouts
> @@ -93,16 +93,6 @@ static void commit_timeout(unsigned long
>  	wake_up_process(p);
>  }
>  
> -/* Static check for data structure consistency.  There's no code
> - * invoked --- we'll just get a linker failure if things aren't right.
> - */
> -void __journal_internal_check(void)
> -{
> -	extern void journal_bad_superblock_size(void);
> -	if (sizeof(struct journal_superblock_s) != 1024)
> -		journal_bad_superblock_size();
> -}
> -
>  /*
>   * kjournald: The main thread function used to manage a logging device
>   * journal.
> @@ -119,16 +109,12 @@ void __journal_internal_check(void)
>   *    known as checkpointing, and this thread is responsible for that job.
>   */
>  
> -journal_t *current_journal;		// AKPM: debug
> -
> -int kjournald(void *arg)
> +static int kjournald(void *arg)
>  {
>  	journal_t *journal = (journal_t *) arg;
>  	transaction_t *transaction;
>  	struct timer_list timer;
>  
> -	current_journal = journal;
> -
>  	daemonize("kjournald");
>  
>  	/* Set up an interval timer which can be used to trigger a
> @@ -1441,7 +1427,7 @@ int journal_wipe(journal_t *journal, int
>   * device this journal is present.
>   */
>  
> -const char *journal_dev_name(journal_t *journal, char *buffer)
> +static const char *journal_dev_name(journal_t *journal, char *buffer)
>  {
>  	struct block_device *bdev;
>  
> @@ -1487,7 +1473,7 @@ void __journal_abort_hard(journal_t *jou
>  
>  /* Soft abort: record the abort error status in the journal superblock,
>   * but don't do any other IO. */
> -void __journal_abort_soft (journal_t *journal, int errno)
> +static void __journal_abort_soft (journal_t *journal, int errno)
>  {
>  	if (journal->j_flags & JFS_ABORT)
>  		return;
> @@ -1890,7 +1876,7 @@ EXPORT_SYMBOL(journal_enable_debug);
>  
>  static struct proc_dir_entry *proc_jbd_debug;
>  
> -int read_jbd_debug(char *page, char **start, off_t off,
> +static int read_jbd_debug(char *page, char **start, off_t off,
>  			  int count, int *eof, void *data)
>  {
>  	int ret;
> @@ -1900,7 +1886,7 @@ int read_jbd_debug(char *page, char **st
>  	return ret;
>  }
>  
> -int write_jbd_debug(struct file *file, const char __user *buffer,
> +static int write_jbd_debug(struct file *file, const char __user *buffer,
>  			   unsigned long count, void *data)
>  {
>  	char buf[32];
> @@ -1989,6 +1975,14 @@ static int __init journal_init(void)
>  {
>  	int ret;
>  
> +/* Static check for data structure consistency.  There's no code
> + * invoked --- we'll just get a linker failure if things aren't right.
> + */
> +	extern void journal_bad_superblock_size(void);
> +	if (sizeof(struct journal_superblock_s) != 1024)
> +		journal_bad_superblock_size();
> +
> +
>  	ret = journal_init_caches();
>  	if (ret != 0)
>  		journal_destroy_caches();

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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