File System query

[Dibyayan Chakraborty]

Hi,
I have the following question regarding the linux file system
implementation.

In linux/fs.h I saw the "struct super_operation" structure. I saw that two
of the member function pointers are write_inode() and put_inode(). But In
the ext2,ext3,ext4 implementation i saw that it uses the only write_inode()
function. So, what is the reason behind keeping the other pointers ?

-- 
With Regards
Dibyayan Chakraborty
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