hi,
I add a u64 field in struct page to record corresponding disk sector postion. I will change and read this field when dealing with page cache staff.
I want it stays zero unless my code change its value. Will the kernel 's allocating code guarantee that
the field is zero when the page is allocated? or Need I add some code to the allocating routine to explicitly fill the field with zero?
Regard，
Lingyu Zhu
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