On 16-Jun-2017 11:44 AM, "Shrikant Giridhar" <shrikantgirid...@gmail.com> wrote:
> I just had a quick look at mount_bdev() code for Linux v3.15, mount_bdev() > can return only root dentry or error. I'm sorry I should have been clearer. I was referring to the documentation mount() where it says that the call can return something other than the root dentry. I have not looked at the doc. More specifically, I don't understand how the what's the purpose of the if condition checking for s_root in mount_bdev(). Apologies if this is a trivial question. If s_root is set it means the superblock is already filled up so call fill_super() only if s_root is NULL meaning superblock is not filled yet. Tracking the calls all the way down didn't seem to make it clearer and I couldn't find specific documentation about the interface. > Also please include the kernel version to which you are referring. I have the 4.12-rc5 kernel. --- Shrikant - Rohan
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