fs/pipe.c: skip file_update_time on frozen fs
Pipe has no data associated with fs so it is not good idea to block pipe_write() if FS is frozen, but we can not update file's time on such filesystem. Let's use same idea as we use in touch_time(). Addresses https://bugzilla.kernel.org/show_bug.cgi?id=65701Signed-off-by: NDmitry Monakhov <dmonakhov@openvz.org> Reviewed-by: NJan Kara <jack@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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