linux-ext4 - Re: [PATCH v8 16/19] fsnotify: generate pre-content permission event on page fault

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Message-ID: <391b9d5f-ec3a-4c90-8345-5dab929917f7@infradead.org>
Date: Tue, 10 Dec 2024 13:12:01 -0800
From: Randy Dunlap <rdunlap@...radead.org>
To: Klara Modin <klarasmodin@...il.com>, Josef Bacik <josef@...icpanda.com>,
 kernel-team@...com, linux-fsdevel@...r.kernel.org, jack@...e.cz,
 amir73il@...il.com, brauner@...nel.org, torvalds@...ux-foundation.org,
 viro@...iv.linux.org.uk, linux-xfs@...r.kernel.org,
 linux-btrfs@...r.kernel.org, linux-mm@...ck.org, linux-ext4@...r.kernel.org
Subject: Re: [PATCH v8 16/19] fsnotify: generate pre-content permission event
 on page fault



On 12/8/24 8:58 AM, Klara Modin wrote:
>> +/**
>> + * filemap_fsnotify_fault - maybe emit a pre-content event.
>> + * @vmf:    struct vm_fault containing details of the fault.
>> + * @folio:    the folio we're faulting in.
>> + *
>> + * If we have a pre-content watch on this file we will emit an event for this
>> + * range.  If we return anything the fault caller should return immediately, we
>> + * will return VM_FAULT_RETRY if we had to emit an event, which will trigger the
>> + * fault again and then the fault handler will run the second time through.
>> + *
>> + * This is meant to be called with the folio that we will be filling in to make
>> + * sure the event is emitted for the correct range.
>> + *
>> + * Return: a bitwise-OR of %VM_FAULT_ codes, 0 if nothing happened.
>> + */
>> +vm_fault_t filemap_fsnotify_fault(struct vm_fault *vmf)
> 
> The parameters mentioned above do not seem to match with the function.


which causes a warning:

mm/filemap.c:3289: warning: Excess function parameter 'folio' description in 'filemap_fsnotify_fault'


-- 
~Randy