path_walk and symbolic links

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can someone please give me a short description what happens when
path_walk encounteres a symbolic link. i am particularly interested
in the following example:

there are two files: /a/b and /c/d where /c/d is a symbolic link to /a/b.
now when i execute path_walk on /c/d and retrieve resulting dentry, what
wil dentry->d_parent chain point to ie. will nd->dentry->d_parent be
dentry of /a or /c?

thanks a lot
lynx


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