Nikhilesh Reddy ececbb5282 vfs: Add support to debug umount failures
When umount of a partition fails with EBUSY there is
no indication as to what is keeping the mount point busy.

Add support to print a kernel log showing what files
are open on this mount point.

Also add a new new config option CONFIG_FILE_TABLE_DEBUG to
enable this feature.

Change-Id: Id7a3f5e7291b22ffd0f265848ec0a9757f713561
Signed-off-by: Nikhilesh Reddy <reddyn@codeaurora.org>
Signed-off-by: Ankit Jain <ankijain@codeaurora.org>
2018-10-23 14:42:00 +05:30
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