linux-kernel - Re: memory leak fix in acpi_memhotplug.c, kmalloc to kzalloc conversion.

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Message-Id: <200608262143.37390.len.brown@intel.com>
Date:	Sat, 26 Aug 2006 21:43:36 -0400
From:	Len Brown <len.brown@...el.com>
To:	"Om Narasimhan" <om.turyx@...il.com>
Cc:	linux-kernel@...r.kernel.org, kernel-janitors@...ts.osdl.org
Subject: Re: memory leak fix in acpi_memhotplug.c, kmalloc to kzalloc conversion.

On Saturday 26 August 2006 20:21, Om Narasimhan wrote:
> Hi,
> This patch fixes one memory leak in drivers/acpi/acpi_memhotplug.c
> Replaces all kmalloc() calls succeeded by memset() to kzalloc() calls.
> Applies cleanly to 2.6.18-rc4. Compile tested.

Compile testing is more effective is you use a .config that
builds each of the source files changed.

> Patch starts here.
> 
> 
>  drivers/acpi/ac.c              |    4 +---
>  drivers/acpi/acpi_memhotplug.c |   14 +++++---------
>  drivers/acpi/asus_acpi.c       |    3 +--
>  drivers/acpi/battery.c         |   13 +++----------
>  drivers/acpi/bus.c             |    3 +--
>  drivers/acpi/button.c          |    4 +---
>  drivers/acpi/container.c       |    4 +---
>  drivers/acpi/ec.c              |   20 +++++---------------
>  drivers/acpi/fan.c             |    3 +--
>  drivers/acpi/i2c_ec.c          |    8 ++------
>  drivers/acpi/osl.c             |    2 +-
>  drivers/acpi/pci_bind.c        |   21 +++++----------------
>  drivers/acpi/pci_irq.c         |   16 +++-------------
>  drivers/acpi/pci_link.c        |    6 ++----
>  drivers/acpi/pci_root.c        |    3 +--
>  drivers/acpi/power.c           |    4 +---
>  drivers/acpi/processor_core.c  |    4 +---
>  drivers/acpi/sbs.c             |    4 +---
>  drivers/acpi/thermal.c         |   13 +++----------
>  drivers/acpi/utils.c           |    4 +---
>  20 files changed, 40 insertions(+), 113 deletions(-)

Please direct patches touching drivers/acpi to me, cc linux-acpi@...r.kernel.org

> diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
> index 96309b9..72738a5 100644
> --- a/drivers/acpi/ac.c
> +++ b/drivers/acpi/ac.c
> @@ -221,11 +221,9 @@ static int acpi_ac_add(struct acpi_devic
>  	if (!device)
>  		return -EINVAL;
> 
> -	ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
> +	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
>  	if (!ac)
>  		return -ENOMEM;
> -	memset(ac, 0, sizeof(struct acpi_ac));
> -
>  	ac->device = device;
>  	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
>  	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
> diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
> index b0d4b14..eb8a5da 100644
> --- a/drivers/acpi/acpi_memhotplug.c
> +++ b/drivers/acpi/acpi_memhotplug.c
> @@ -297,6 +297,7 @@ static int acpi_memory_disable_device(st
>  	 * Ask the VM to offline this memory range.
>  	 * Note: Assume that this function returns zero on success
>  	 */
> +	struct acpi_memory_info *info, *n;

What tree is this patch against?
This line is already present (above the comment) in 2.6.18-rc4.

thanks,
-Len

-
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