fuse: fix "direct_io" private mmap
MAP_PRIVATE mmap could return stale data from the cache for "direct_io" files. Fix this by flushing the cache on mmap. Found with a slightly modified fsx-linux. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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@ -1298,6 +1298,8 @@ static int fuse_direct_mmap(struct file *file, struct vm_area_struct *vma)
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if (vma->vm_flags & VM_MAYSHARE)
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return -ENODEV;
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invalidate_inode_pages2(file->f_mapping);
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return generic_file_mmap(file, vma);
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}
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