linux-ext4 - [PATCH v2 2/2] jbd2: add prefix 'jbd2' for 'shrink

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Message-ID: <20240407065355.1528580-3-yebin10@huawei.com>
Date: Sun, 7 Apr 2024 14:53:55 +0800
From: Ye Bin <yebin10@...wei.com>
To: <tytso@....edu>, <adilger.kernel@...ger.ca>, <linux-ext4@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, <jack@...e.cz>, Ye Bin
	<yebin10@...wei.com>
Subject: [PATCH v2 2/2] jbd2: add prefix 'jbd2' for 'shrink_type'

As 'shrink_type' is exported. The module prefix 'jbd2' is added to
distinguish from memory reclamation.

Signed-off-by: Ye Bin <yebin10@...wei.com>
---
 fs/jbd2/checkpoint.c | 22 +++++++++++-----------
 fs/jbd2/commit.c     |  2 +-
 include/linux/jbd2.h |  4 ++--
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 80c0ab98bc63..951f78634adf 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -348,7 +348,7 @@ int jbd2_cleanup_journal_tail(journal_t *journal)
  * Called with j_list_lock held.
  */
 static unsigned long journal_shrink_one_cp_list(struct journal_head *jh,
-						enum shrink_type type,
+						enum jbd2_shrink_type type,
 						bool *released)
 {
 	struct journal_head *last_jh;
@@ -365,12 +365,12 @@ static unsigned long journal_shrink_one_cp_list(struct journal_head *jh,
 		jh = next_jh;
 		next_jh = jh->b_cpnext;
 
-		if (type == SHRINK_DESTROY) {
+		if (type == JBD2_SHRINK_DESTROY) {
 			ret = __jbd2_journal_remove_checkpoint(jh);
 		} else {
 			ret = jbd2_journal_try_remove_checkpoint(jh);
 			if (ret < 0) {
-				if (type == SHRINK_BUSY_SKIP)
+				if (type == JBD2_SHRINK_BUSY_SKIP)
 					continue;
 				break;
 			}
@@ -437,7 +437,7 @@ unsigned long jbd2_journal_shrink_checkpoint_list(journal_t *journal,
 		tid = transaction->t_tid;
 
 		freed = journal_shrink_one_cp_list(transaction->t_checkpoint_list,
-						   SHRINK_BUSY_SKIP, &released);
+						   JBD2_SHRINK_BUSY_SKIP, &released);
 		nr_freed += freed;
 		(*nr_to_scan) -= min(*nr_to_scan, freed);
 		if (*nr_to_scan == 0)
@@ -470,20 +470,20 @@ unsigned long jbd2_journal_shrink_checkpoint_list(journal_t *journal,
  * journal_clean_checkpoint_list
  *
  * Find all the written-back checkpoint buffers in the journal and release them.
- * If 'type' is SHRINK_DESTROY, release all buffers unconditionally. If 'type'
- * is SHRINK_BUSY_STOP, will stop release buffers if encounters a busy buffer.
- * To avoid wasting CPU cycles scanning the buffer list in some cases, don't
- * pass SHRINK_BUSY_SKIP 'type' for this function.
+ * If 'type' is JBD2_SHRINK_DESTROY, release all buffers unconditionally. If
+ * 'type' is JBD2_SHRINK_BUSY_STOP, will stop release buffers if encounters a
+ * busy buffer. To avoid wasting CPU cycles scanning the buffer list in some
+ * cases, don't pass JBD2_SHRINK_BUSY_SKIP 'type' for this function.
  *
  * Called with j_list_lock held.
  */
 void __jbd2_journal_clean_checkpoint_list(journal_t *journal,
-					  enum shrink_type type)
+					  enum jbd2_shrink_type type)
 {
 	transaction_t *transaction, *last_transaction, *next_transaction;
 	bool released;
 
-	WARN_ON_ONCE(type == SHRINK_BUSY_SKIP);
+	WARN_ON_ONCE(type == JBD2_SHRINK_BUSY_SKIP);
 
 	transaction = journal->j_checkpoint_transactions;
 	if (!transaction)
@@ -529,7 +529,7 @@ void jbd2_journal_destroy_checkpoint(journal_t *journal)
 			spin_unlock(&journal->j_list_lock);
 			break;
 		}
-		__jbd2_journal_clean_checkpoint_list(journal, SHRINK_DESTROY);
+		__jbd2_journal_clean_checkpoint_list(journal, JBD2_SHRINK_DESTROY);
 		spin_unlock(&journal->j_list_lock);
 		cond_resched();
 	}
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 78ebd04ac97d..65c857ab49ec 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -501,7 +501,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
 	 * frees some memory
 	 */
 	spin_lock(&journal->j_list_lock);
-	__jbd2_journal_clean_checkpoint_list(journal, SHRINK_BUSY_STOP);
+	__jbd2_journal_clean_checkpoint_list(journal, JBD2_SHRINK_BUSY_STOP);
 	spin_unlock(&journal->j_list_lock);
 
 	jbd2_debug(3, "JBD2: commit phase 1\n");
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 58a961999d70..7479f64c0939 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1434,9 +1434,9 @@ void jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block);
 extern void jbd2_journal_commit_transaction(journal_t *);
 
 /* Checkpoint list management */
-enum shrink_type {SHRINK_DESTROY, SHRINK_BUSY_STOP, SHRINK_BUSY_SKIP};
+enum jbd2_shrink_type {JBD2_SHRINK_DESTROY, JBD2_SHRINK_BUSY_STOP, JBD2_SHRINK_BUSY_SKIP};
 
-void __jbd2_journal_clean_checkpoint_list(journal_t *journal, enum shrink_type type);
+void __jbd2_journal_clean_checkpoint_list(journal_t *journal, enum jbd2_shrink_type type);
 unsigned long jbd2_journal_shrink_checkpoint_list(journal_t *journal, unsigned long *nr_to_scan);
 int __jbd2_journal_remove_checkpoint(struct journal_head *);
 int jbd2_journal_try_remove_checkpoint(struct journal_head *jh);
-- 
2.31.1