lkml.org 
[lkml]   [2018]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 1/2] iommu - Enable debugfs exposure of the IOMMU
From
Date
On 17/04/18 18:36, Hook, Gary wrote:
> On 4/13/2018 7:55 PM, Mehta, Sohil wrote:
>> On Fri, 2018-04-06 at 08:17 -0500, Gary R Hook wrote:
>>> +struct dentry *iommu_debugfs_setup(void)
>>> +{
>>> +    if (!debugfs_initialized())
>>
>> This check is probably not needed.
>
> Ah, so it isn't. Thank you.
>
>>
>>> +        return NULL;
>>> +
>>> +    if (!iommu_debugfs_dir)
>>> +        iommu_debugfs_dir = debugfs_create_dir("iommu",
>>> NULL);
>>> +
>>> +    if (iommu_debugfs_dir)
>>> +        pr_warn("WARNING: IOMMU DEBUGFS SUPPORT HAS BEEN
>>> ENABLED IN THIS KERNEL\n");
>>> +
>>
>> As this gets called for each IOMMU, do you want to use pr_warn_once?
>
> That works, yes.

Or I guess you could just roll the pr_warn() into the previous if()
condition, i.e. only warn when the singleton debugfs_dir is actually
created.

Robin.

>
>>
>>> +    return iommu_debugfs_dir;
>>> +}
>>> +EXPORT_SYMBOL_GPL(iommu_debugfs_setup);
>>
>> -Sohil
>>
>
> _______________________________________________
> iommu mailing list
> iommu@lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu

\
 
 \ /
  Last update: 2018-04-17 19:56    [W:0.065 / U:2.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site