From 65984ff9d2179a97e5a11aaef1e86fdb276cfad5 Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Sun, 4 Aug 2013 17:23:51 +0000 Subject: [PATCH] um: hostfs: Fix writeback We have to implement ->release() and trigger writeback from it. Otherwise we might lose dirty pages at munmap(). Signed-off-by: Richard Weinberger --- fs/hostfs/hostfs_kern.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index cddb052..2543728 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -361,6 +361,13 @@ retry: return 0; } +static int hostfs_file_release(struct inode *inode, struct file *file) +{ + filemap_write_and_wait(inode->i_mapping); + + return 0; +} + int hostfs_fsync(struct file *file, loff_t start, loff_t end, int datasync) { struct inode *inode = file->f_mapping->host; @@ -386,7 +393,7 @@ static const struct file_operations hostfs_file_fops = { .write = do_sync_write, .mmap = generic_file_mmap, .open = hostfs_file_open, - .release = NULL, + .release = hostfs_file_release, .fsync = hostfs_fsync, }; -- 2.7.4