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authorJan Kara <jack@suse.cz>2016-11-10 16:02:11 +0100
committerJan Kara <jack@suse.cz>2017-04-10 17:37:36 +0200
commitabc77577a669f424c5d0c185b9994f2621c52aa4 (patch)
treea7e18bc2c8229a8a634d899445c33958f8967876 /fs/ncpfs
parentfsnotify: Remove special handling of mark destruction on group shutdown (diff)
downloadlinux-abc77577a669f424c5d0c185b9994f2621c52aa4.tar.xz
linux-abc77577a669f424c5d0c185b9994f2621c52aa4.zip
fsnotify: Provide framework for dropping SRCU lock in ->handle_event
fanotify wants to drop fsnotify_mark_srcu lock when waiting for response from userspace so that the whole notification subsystem is not blocked during that time. This patch provides a framework for safely getting mark reference for a mark found in the object list which pins the mark in that list. We can then drop fsnotify_mark_srcu, wait for userspace response and then safely continue iteration of the object list once we reaquire fsnotify_mark_srcu. Reviewed-by: Miklos Szeredi <mszeredi@redhat.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
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