[PATCH 0/2] Regmap: let the code more readable

[PATCH 0/2] Regmap: let the code more readable

[Xiubo Li]

From: lixiubo <lixiubo@cmss.chinamobile.com>

Replace kzalloc/kmalloc with kcalloc/kmalloc_array.

lixiubo (2):
  Regmap: replace kzalloc with kcalloc
  Regmap: replace kmalloc with kmalloc_array

 drivers/base/regmap/regcache-flat.c   |  2 +-
 drivers/base/regmap/regcache-lzo.c    |  6 +++---
 drivers/base/regmap/regcache-rbtree.c |  9 +++++----
 drivers/base/regmap/regmap-irq.c      | 13 +++++++------
 4 files changed, 16 insertions(+), 14 deletions(-)

-- 
1.8.3.1

[PATCH 1/2] Regmap: replace kzalloc with kcalloc

[Xiubo Li]

From: lixiubo <lixiubo@cmss.chinamobile.com>

Replace kzalloc with specialized function kcalloc when the size is
a multiplication of : number * sizeof

Signed-off-by: lixiubo <lixiubo@cmss.chinamobile.com>
---
 drivers/base/regmap/regcache-flat.c   | 2 +-
 drivers/base/regmap/regcache-lzo.c    | 2 +-
 drivers/base/regmap/regcache-rbtree.c | 5 +++--
 drivers/base/regmap/regmap-irq.c      | 8 ++++----
 4 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/base/regmap/regcache-flat.c b/drivers/base/regmap/regcache-flat.c
index 0246f44..686c9e0 100644
--- a/drivers/base/regmap/regcache-flat.c
+++ b/drivers/base/regmap/regcache-flat.c
@@ -21,7 +21,7 @@ static int regcache_flat_init(struct regmap *map)
 	int i;
 	unsigned int *cache;
 
-	map->cache = kzalloc(sizeof(unsigned int) * (map->max_register + 1),
+	map->cache = kcalloc(map->max_register + 1, sizeof(unsigned int),
 			     GFP_KERNEL);
 	if (!map->cache)
 		return -ENOMEM;
diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 2d53f6f..1f4eef2 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -139,7 +139,7 @@ static int regcache_lzo_init(struct regmap *map)
 	ret = 0;
 
 	blkcount = regcache_lzo_block_count(map);
-	map->cache = kzalloc(blkcount * sizeof *lzo_blocks,
+	map->cache = kcalloc(blkcount, sizeof(*lzo_blocks),
 			     GFP_KERNEL);
 	if (!map->cache)
 		return -ENOMEM;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 56486d9..3b6cfed 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -366,8 +366,9 @@ regcache_rbtree_node_alloc(struct regmap *map, unsigned int reg)
 	if (!rbnode->block)
 		goto err_free;
 
-	rbnode->cache_present = kzalloc(BITS_TO_LONGS(rbnode->blklen) *
-		sizeof(*rbnode->cache_present), GFP_KERNEL);
+	rbnode->cache_present = kcalloc(BITS_TO_LONGS(rbnode->blklen),
+					sizeof(*rbnode->cache_present),
+					GFP_KERNEL);
 	if (!rbnode->cache_present)
 		goto err_free_block;
 
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 38d1f72..78d4805 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -364,23 +364,23 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 	if (!d)
 		return -ENOMEM;
 
-	d->status_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
+	d->status_buf = kcalloc(chip->num_regs, sizeof(unsigned int),
 				GFP_KERNEL);
 	if (!d->status_buf)
 		goto err_alloc;
 
-	d->mask_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
+	d->mask_buf = kcalloc(chip->num_regs, sizeof(unsigned int),
 			      GFP_KERNEL);
 	if (!d->mask_buf)
 		goto err_alloc;
 
-	d->mask_buf_def = kzalloc(sizeof(unsigned int) * chip->num_regs,
+	d->mask_buf_def = kcalloc(chip->num_regs, sizeof(unsigned int),
 				  GFP_KERNEL);
 	if (!d->mask_buf_def)
 		goto err_alloc;
 
 	if (chip->wake_base) {
-		d->wake_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
+		d->wake_buf = kcalloc(chip->num_regs, sizeof(unsigned int),
 				      GFP_KERNEL);
 		if (!d->wake_buf)
 			goto err_alloc;
-- 
1.8.3.1

[PATCH 2/2] Regmap: replace kmalloc with kmalloc_array

[Xiubo Li]

From: lixiubo <lixiubo@cmss.chinamobile.com>

Replace kmalloc with specialized function kmalloc_array when the size
is a multiplication of : number * size

Signed-off-by: lixiubo <lixiubo@cmss.chinamobile.com>
---
 drivers/base/regmap/regcache-lzo.c    | 4 ++--
 drivers/base/regmap/regcache-rbtree.c | 4 ++--
 drivers/base/regmap/regmap-irq.c      | 5 +++--
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 1f4eef2..0c652243 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -152,8 +152,8 @@ static int regcache_lzo_init(struct regmap *map)
 	 * that register.
 	 */
 	bmp_size = map->num_reg_defaults_raw;
-	sync_bmp = kmalloc(BITS_TO_LONGS(bmp_size) * sizeof(long),
-			   GFP_KERNEL);
+	sync_bmp = kmalloc_array(BITS_TO_LONGS(bmp_size), sizeof(long),
+				 GFP_KERNEL);
 	if (!sync_bmp) {
 		ret = -ENOMEM;
 		goto err;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 3b6cfed..9d7ced5 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -361,8 +361,8 @@ regcache_rbtree_node_alloc(struct regmap *map, unsigned int reg)
 		rbnode->base_reg = reg;
 	}
 
-	rbnode->block = kmalloc(rbnode->blklen * map->cache_word_size,
-				GFP_KERNEL);
+	rbnode->block = kmalloc_array(rbnode->blklen, map->cache_word_size,
+				      GFP_KERNEL);
 	if (!rbnode->block)
 		goto err_free;
 
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 78d4805..79014be 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -400,8 +400,9 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 
 	if (!map->use_single_read && map->reg_stride == 1 &&
 	    d->irq_reg_stride == 1) {
-		d->status_reg_buf = kmalloc(map->format.val_bytes *
-					    chip->num_regs, GFP_KERNEL);
+		d->status_reg_buf = kmalloc_array(chip->num_regs,
+						  map->format.val_bytes,
+						  GFP_KERNEL);
 		if (!d->status_reg_buf)
 			goto err_alloc;
 	}
-- 
1.8.3.1

Applied "regmap: replace kmalloc with kmalloc_array" to the regmap tree

[Mark Brown]

The patch

   regmap: replace kmalloc with kmalloc_array

has been applied to the regmap tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 549e08a0a93442ab62e0aee8aeb8ae6a7f2b5273 Mon Sep 17 00:00:00 2001
From: lixiubo <lixiubo@cmss.chinamobile.com>
Date: Fri, 20 Nov 2015 18:06:30 +0800
Subject: [PATCH] regmap: replace kmalloc with kmalloc_array

Replace kmalloc with specialized function kmalloc_array when the size
is a multiplication of : number * size

Signed-off-by: lixiubo <lixiubo@cmss.chinamobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/base/regmap/regcache-lzo.c    | 4 ++--
 drivers/base/regmap/regcache-rbtree.c | 4 ++--
 drivers/base/regmap/regmap-irq.c      | 5 +++--
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 52f69381c070..6f77d7319fc6 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -152,8 +152,8 @@ static int regcache_lzo_init(struct regmap *map)
 	 * that register.
 	 */
 	bmp_size = map->num_reg_defaults_raw;
-	sync_bmp = kmalloc(BITS_TO_LONGS(bmp_size) * sizeof(long),
-			   GFP_KERNEL);
+	sync_bmp = kmalloc_array(BITS_TO_LONGS(bmp_size), sizeof(long),
+				 GFP_KERNEL);
 	if (!sync_bmp) {
 		ret = -ENOMEM;
 		goto err;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 3b6cfede2fd9..9d7ced559cba 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -361,8 +361,8 @@ regcache_rbtree_node_alloc(struct regmap *map, unsigned int reg)
 		rbnode->base_reg = reg;
 	}
 
-	rbnode->block = kmalloc(rbnode->blklen * map->cache_word_size,
-				GFP_KERNEL);
+	rbnode->block = kmalloc_array(rbnode->blklen, map->cache_word_size,
+				      GFP_KERNEL);
 	if (!rbnode->block)
 		goto err_free;
 
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 4ebbe21ded82..4d2cb21254aa 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -422,8 +422,9 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 
 	if (!map->use_single_read && map->reg_stride == 1 &&
 	    d->irq_reg_stride == 1) {
-		d->status_reg_buf = kmalloc(map->format.val_bytes *
-					    chip->num_regs, GFP_KERNEL);
+		d->status_reg_buf = kmalloc_array(chip->num_regs,
+						  map->format.val_bytes,
+						  GFP_KERNEL);
 		if (!d->status_reg_buf)
 			goto err_alloc;
 	}
-- 
2.6.2

Applied "regmap: replace kzalloc with kcalloc" to the regmap tree

[Mark Brown]

The patch

   regmap: replace kzalloc with kcalloc

has been applied to the regmap tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From eeda1bd69d5d8a020ce191f717b94ca99707daad Mon Sep 17 00:00:00 2001
From: lixiubo <lixiubo@cmss.chinamobile.com>
Date: Fri, 20 Nov 2015 18:06:29 +0800
Subject: [PATCH] regmap: replace kzalloc with kcalloc

Replace kzalloc with specialized function kcalloc when the size is
a multiplication of : number * sizeof

Signed-off-by: lixiubo <lixiubo@cmss.chinamobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/base/regmap/regcache-flat.c   | 2 +-
 drivers/base/regmap/regcache-lzo.c    | 2 +-
 drivers/base/regmap/regcache-rbtree.c | 5 +++--
 drivers/base/regmap/regmap-irq.c      | 8 ++++----
 4 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/base/regmap/regcache-flat.c b/drivers/base/regmap/regcache-flat.c
index 0246f44ded74..686c9e0b930e 100644
--- a/drivers/base/regmap/regcache-flat.c
+++ b/drivers/base/regmap/regcache-flat.c
@@ -21,7 +21,7 @@ static int regcache_flat_init(struct regmap *map)
 	int i;
 	unsigned int *cache;
 
-	map->cache = kzalloc(sizeof(unsigned int) * (map->max_register + 1),
+	map->cache = kcalloc(map->max_register + 1, sizeof(unsigned int),
 			     GFP_KERNEL);
 	if (!map->cache)
 		return -ENOMEM;
diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 736e0d378567..52f69381c070 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -139,7 +139,7 @@ static int regcache_lzo_init(struct regmap *map)
 	ret = 0;
 
 	blkcount = regcache_lzo_block_count(map);
-	map->cache = kzalloc(blkcount * sizeof *lzo_blocks,
+	map->cache = kcalloc(blkcount, sizeof(*lzo_blocks),
 			     GFP_KERNEL);
 	if (!map->cache)
 		return -ENOMEM;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 56486d92c4e7..3b6cfede2fd9 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -366,8 +366,9 @@ regcache_rbtree_node_alloc(struct regmap *map, unsigned int reg)
 	if (!rbnode->block)
 		goto err_free;
 
-	rbnode->cache_present = kzalloc(BITS_TO_LONGS(rbnode->blklen) *
-		sizeof(*rbnode->cache_present), GFP_KERNEL);
+	rbnode->cache_present = kcalloc(BITS_TO_LONGS(rbnode->blklen),
+					sizeof(*rbnode->cache_present),
+					GFP_KERNEL);
 	if (!rbnode->cache_present)
 		goto err_free_block;
 
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 8d16db533527..4ebbe21ded82 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -386,23 +386,23 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 	if (!d)
 		return -ENOMEM;
 
-	d->status_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
+	d->status_buf = kcalloc(chip->num_regs, sizeof(unsigned int),
 				GFP_KERNEL);
 	if (!d->status_buf)
 		goto err_alloc;
 
-	d->mask_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
+	d->mask_buf = kcalloc(chip->num_regs, sizeof(unsigned int),
 			      GFP_KERNEL);
 	if (!d->mask_buf)
 		goto err_alloc;
 
-	d->mask_buf_def = kzalloc(sizeof(unsigned int) * chip->num_regs,
+	d->mask_buf_def = kcalloc(chip->num_regs, sizeof(unsigned int),
 				  GFP_KERNEL);
 	if (!d->mask_buf_def)
 		goto err_alloc;
 
 	if (chip->wake_base) {
-		d->wake_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
+		d->wake_buf = kcalloc(chip->num_regs, sizeof(unsigned int),
 				      GFP_KERNEL);
 		if (!d->wake_buf)
 			goto err_alloc;
-- 
2.6.2