As per comments related to devm_kzalloc, memory allocated using it is freed automatically.
However there is a function called devm_kfree, comment section of which says that it is used to free memory allocated using devm_kzalloc().
If memory allocated by devm_kzalloc is freed automatically, what's the need & significance of devm_kfree?
Thanks,
Venu
On 08/08/2012 07:56 AM, Venu Byravarasu wrote:
> As per comments related to devm_kzalloc, memory allocated using it is
> freed automatically.
> However there is a function called devm_kfree, comment section of which
> says that it is used to free memory allocated using devm_kzalloc().
> If memory allocated by devm_kzalloc is freed automatically, what's the
> need & significance of devm_kfree?
>
> Thanks,
> Venu
>
Hi,
Memory allocated with devm_kzalloc is freed at the end of the lifetime of the
device it is attached to. If you for some reason want to free allocated with
memory devm_kzalloc before that of the lifetime of the device can use devm_kfree.
- Lars
> -----Original Message-----
> From: Lars-Peter Clausen [mailto:[email protected]]
> Sent: Wednesday, August 08, 2012 12:00 PM
> To: Venu Byravarasu
> Cc: [email protected]
> Subject: Re: question on devm_kfree
>
> On 08/08/2012 07:56 AM, Venu Byravarasu wrote:
> > As per comments related to devm_kzalloc, memory allocated using it is
> > freed automatically.
> > However there is a function called devm_kfree, comment section of which
> > says that it is used to free memory allocated using devm_kzalloc().
> > If memory allocated by devm_kzalloc is freed automatically, what's the
> > need & significance of devm_kfree?
> >
> > Thanks,
> > Venu
> >
>
> Hi,
>
> Memory allocated with devm_kzalloc is freed at the end of the lifetime of the
> device it is attached to. If you for some reason want to free allocated with
> memory devm_kzalloc before that of the lifetime of the device can use
> devm_kfree.
>
>
> - Lars
Thanks Lars.