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From: Andrew Morton <>
To: Souptick Joarder <>
Subject: Re: [PATCH v2] fs: ocfs2: Adding new return type vm_fault_t
Date: Fri, 1 Jun 2018 16:47:52 -0700	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <20180523153258.GA28451@jordon-HP-15-Notebook-PC>

On Wed, 23 May 2018 21:02:58 +0530 Souptick Joarder <> wrote:

> Use new return type vm_fault_t for fault handler. For
> now, this is just documenting that the function returns
> a VM_FAULT value rather than an errno. Once all instances
> are converted, vm_fault_t will become a distinct type.
> Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
> vmf_error() is the newly introduce inline function
> in 4.18.
> Fix one warning by replacing BUG_ON()
> with WARN_ON()

err, no, I'll revert that part.

It could be that if this assertion triggers then filesystem corruption
would ensue, in which case a BUG_ON() is the appropriate handling. 
Such a change should be submitted separately, please.

--- a/fs/ocfs2/mmap.c~fs-ocfs2-adding-new-return-type-vm_fault_t-fix
+++ a/fs/ocfs2/mmap.c
@@ -120,7 +120,7 @@ static vm_fault_t __ocfs2_page_mkwrite(s
 		goto out;
 	err = ocfs2_write_end_nolock(mapping, pos, len, len, fsdata);
-	WARN_ON(err != len);
+	BUG_ON(err != len);
 	return ret;

  parent reply	other threads:[~2018-06-01 23:47 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-23 15:32 Souptick Joarder
2018-05-30 11:40 ` Souptick Joarder
2018-06-01 23:47 ` Andrew Morton [this message]
2018-06-02  6:16   ` Souptick Joarder
2018-06-04 23:05     ` Andrew Morton

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