Con Kolivas [off-list ref] wrote:

 > > +/* Last total free pages */
 > > +static unsigned long last_free = 0;
 > > +static unsigned long temp_free = 0;
 >
 > Unneeded initialisation.

 Very first use of both of these variables depends on them being initialised.

All bss is initialised to zero at bootup.  So all the `= 0' is doing here
is moving these variables from .bss to .data, and taking up extra space in
vmlinux.

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