diff mbox

[v4,06/12] dax: consistent variable naming for DAX entries

Message ID 1475189370-31634-7-git-send-email-ross.zwisler@linux.intel.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Ross Zwisler Sept. 29, 2016, 10:49 p.m. UTC 
No functional change.

Consistently use the variable name 'entry' instead of 'ret' for DAX radix
tree entries.  This was already happening in most of the code, so update
get_unlocked_mapping_entry(), grab_mapping_entry() and
dax_unlock_mapping_entry().

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---
 fs/dax.c | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

Comments

Christoph Hellwig Sept. 30, 2016, 8:50 a.m. UTC | #1 
Looks fine,

Reviewed-by: Christoph Hellwig <hch@lst.de>
Jan Kara Oct. 3, 2016, 9:37 a.m. UTC | #2 
On Thu 29-09-16 16:49:24, Ross Zwisler wrote:
> No functional change.
> 
> Consistently use the variable name 'entry' instead of 'ret' for DAX radix
> tree entries.  This was already happening in most of the code, so update
> get_unlocked_mapping_entry(), grab_mapping_entry() and
> dax_unlock_mapping_entry().
> 
> Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>

Looks good. You can add:

Reviewed-by: Jan Kara <jack@suse.cz>

								Honza

> ---
>  fs/dax.c | 34 +++++++++++++++++-----------------
>  1 file changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/fs/dax.c b/fs/dax.c
> index ac28cdf..baef586 100644
> --- a/fs/dax.c
> +++ b/fs/dax.c
> @@ -357,7 +357,7 @@ static inline void *unlock_slot(struct address_space *mapping, void **slot)
>  static void *get_unlocked_mapping_entry(struct address_space *mapping,
>  					pgoff_t index, void ***slotp)
>  {
> -	void *ret, **slot;
> +	void *entry, **slot;
>  	struct wait_exceptional_entry_queue ewait;
>  	wait_queue_head_t *wq = dax_entry_waitqueue(mapping, index);
>  
> @@ -367,13 +367,13 @@ static void *get_unlocked_mapping_entry(struct address_space *mapping,
>  	ewait.key.index = index;
>  
>  	for (;;) {
> -		ret = __radix_tree_lookup(&mapping->page_tree, index, NULL,
> +		entry = __radix_tree_lookup(&mapping->page_tree, index, NULL,
>  					  &slot);
> -		if (!ret || !radix_tree_exceptional_entry(ret) ||
> +		if (!entry || !radix_tree_exceptional_entry(entry) ||
>  		    !slot_locked(mapping, slot)) {
>  			if (slotp)
>  				*slotp = slot;
> -			return ret;
> +			return entry;
>  		}
>  		prepare_to_wait_exclusive(wq, &ewait.wait,
>  					  TASK_UNINTERRUPTIBLE);
> @@ -396,13 +396,13 @@ static void *get_unlocked_mapping_entry(struct address_space *mapping,
>   */
>  static void *grab_mapping_entry(struct address_space *mapping, pgoff_t index)
>  {
> -	void *ret, **slot;
> +	void *entry, **slot;
>  
>  restart:
>  	spin_lock_irq(&mapping->tree_lock);
> -	ret = get_unlocked_mapping_entry(mapping, index, &slot);
> +	entry = get_unlocked_mapping_entry(mapping, index, &slot);
>  	/* No entry for given index? Make sure radix tree is big enough. */
> -	if (!ret) {
> +	if (!entry) {
>  		int err;
>  
>  		spin_unlock_irq(&mapping->tree_lock);
> @@ -410,10 +410,10 @@ restart:
>  				mapping_gfp_mask(mapping) & ~__GFP_HIGHMEM);
>  		if (err)
>  			return ERR_PTR(err);
> -		ret = (void *)(RADIX_TREE_EXCEPTIONAL_ENTRY |
> +		entry = (void *)(RADIX_TREE_EXCEPTIONAL_ENTRY |
>  			       RADIX_DAX_ENTRY_LOCK);
>  		spin_lock_irq(&mapping->tree_lock);
> -		err = radix_tree_insert(&mapping->page_tree, index, ret);
> +		err = radix_tree_insert(&mapping->page_tree, index, entry);
>  		radix_tree_preload_end();
>  		if (err) {
>  			spin_unlock_irq(&mapping->tree_lock);
> @@ -425,11 +425,11 @@ restart:
>  		/* Good, we have inserted empty locked entry into the tree. */
>  		mapping->nrexceptional++;
>  		spin_unlock_irq(&mapping->tree_lock);
> -		return ret;
> +		return entry;
>  	}
>  	/* Normal page in radix tree? */
> -	if (!radix_tree_exceptional_entry(ret)) {
> -		struct page *page = ret;
> +	if (!radix_tree_exceptional_entry(entry)) {
> +		struct page *page = entry;
>  
>  		get_page(page);
>  		spin_unlock_irq(&mapping->tree_lock);
> @@ -442,9 +442,9 @@ restart:
>  		}
>  		return page;
>  	}
> -	ret = lock_slot(mapping, slot);
> +	entry = lock_slot(mapping, slot);
>  	spin_unlock_irq(&mapping->tree_lock);
> -	return ret;
> +	return entry;
>  }
>  
>  void dax_wake_mapping_entry_waiter(struct address_space *mapping,
> @@ -469,11 +469,11 @@ void dax_wake_mapping_entry_waiter(struct address_space *mapping,
>  
>  void dax_unlock_mapping_entry(struct address_space *mapping, pgoff_t index)
>  {
> -	void *ret, **slot;
> +	void *entry, **slot;
>  
>  	spin_lock_irq(&mapping->tree_lock);
> -	ret = __radix_tree_lookup(&mapping->page_tree, index, NULL, &slot);
> -	if (WARN_ON_ONCE(!ret || !radix_tree_exceptional_entry(ret) ||
> +	entry = __radix_tree_lookup(&mapping->page_tree, index, NULL, &slot);
> +	if (WARN_ON_ONCE(!entry || !radix_tree_exceptional_entry(entry) ||
>  			 !slot_locked(mapping, slot))) {
>  		spin_unlock_irq(&mapping->tree_lock);
>  		return;
> -- 
> 2.7.4
> 
>
diff mbox

Patch

diff --git a/fs/dax.c b/fs/dax.c
index ac28cdf..baef586 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -357,7 +357,7 @@  static inline void *unlock_slot(struct address_space *mapping, void **slot)
 static void *get_unlocked_mapping_entry(struct address_space *mapping,
 					pgoff_t index, void ***slotp)
 {
-	void *ret, **slot;
+	void *entry, **slot;
 	struct wait_exceptional_entry_queue ewait;
 	wait_queue_head_t *wq = dax_entry_waitqueue(mapping, index);
 
@@ -367,13 +367,13 @@  static void *get_unlocked_mapping_entry(struct address_space *mapping,
 	ewait.key.index = index;
 
 	for (;;) {
-		ret = __radix_tree_lookup(&mapping->page_tree, index, NULL,
+		entry = __radix_tree_lookup(&mapping->page_tree, index, NULL,
 					  &slot);
-		if (!ret || !radix_tree_exceptional_entry(ret) ||
+		if (!entry || !radix_tree_exceptional_entry(entry) ||
 		    !slot_locked(mapping, slot)) {
 			if (slotp)
 				*slotp = slot;
-			return ret;
+			return entry;
 		}
 		prepare_to_wait_exclusive(wq, &ewait.wait,
 					  TASK_UNINTERRUPTIBLE);
@@ -396,13 +396,13 @@  static void *get_unlocked_mapping_entry(struct address_space *mapping,
  */
 static void *grab_mapping_entry(struct address_space *mapping, pgoff_t index)
 {
-	void *ret, **slot;
+	void *entry, **slot;
 
 restart:
 	spin_lock_irq(&mapping->tree_lock);
-	ret = get_unlocked_mapping_entry(mapping, index, &slot);
+	entry = get_unlocked_mapping_entry(mapping, index, &slot);
 	/* No entry for given index? Make sure radix tree is big enough. */
-	if (!ret) {
+	if (!entry) {
 		int err;
 
 		spin_unlock_irq(&mapping->tree_lock);
@@ -410,10 +410,10 @@  restart:
 				mapping_gfp_mask(mapping) & ~__GFP_HIGHMEM);
 		if (err)
 			return ERR_PTR(err);
-		ret = (void *)(RADIX_TREE_EXCEPTIONAL_ENTRY |
+		entry = (void *)(RADIX_TREE_EXCEPTIONAL_ENTRY |
 			       RADIX_DAX_ENTRY_LOCK);
 		spin_lock_irq(&mapping->tree_lock);
-		err = radix_tree_insert(&mapping->page_tree, index, ret);
+		err = radix_tree_insert(&mapping->page_tree, index, entry);
 		radix_tree_preload_end();
 		if (err) {
 			spin_unlock_irq(&mapping->tree_lock);
@@ -425,11 +425,11 @@  restart:
 		/* Good, we have inserted empty locked entry into the tree. */
 		mapping->nrexceptional++;
 		spin_unlock_irq(&mapping->tree_lock);
-		return ret;
+		return entry;
 	}
 	/* Normal page in radix tree? */
-	if (!radix_tree_exceptional_entry(ret)) {
-		struct page *page = ret;
+	if (!radix_tree_exceptional_entry(entry)) {
+		struct page *page = entry;
 
 		get_page(page);
 		spin_unlock_irq(&mapping->tree_lock);
@@ -442,9 +442,9 @@  restart:
 		}
 		return page;
 	}
-	ret = lock_slot(mapping, slot);
+	entry = lock_slot(mapping, slot);
 	spin_unlock_irq(&mapping->tree_lock);
-	return ret;
+	return entry;
 }
 
 void dax_wake_mapping_entry_waiter(struct address_space *mapping,
@@ -469,11 +469,11 @@  void dax_wake_mapping_entry_waiter(struct address_space *mapping,
 
 void dax_unlock_mapping_entry(struct address_space *mapping, pgoff_t index)
 {
-	void *ret, **slot;
+	void *entry, **slot;
 
 	spin_lock_irq(&mapping->tree_lock);
-	ret = __radix_tree_lookup(&mapping->page_tree, index, NULL, &slot);
-	if (WARN_ON_ONCE(!ret || !radix_tree_exceptional_entry(ret) ||
+	entry = __radix_tree_lookup(&mapping->page_tree, index, NULL, &slot);
+	if (WARN_ON_ONCE(!entry || !radix_tree_exceptional_entry(entry) ||
 			 !slot_locked(mapping, slot))) {
 		spin_unlock_irq(&mapping->tree_lock);
 		return;