Uclinux-2008r1-rc8 (bf561) to VDSP5 Transplantation (m): a definition of jiffies_64

In Uclinux, Jiffies_64 's declaration is:

#define __jiffy_data __attribute__((section(".data")))
extern u64 __jiffy_data jiffies_64;

It is defined in KERNEL/TIMER.C:

U64 __jiffy_data jiffies_64 __cacheline_aligned_in_smp = initial_jiffies;

This definition does not seem to be a problem, but when compiling kernel/timer.c, it creates a very strange error, and the error message is:

[Error ea1008] "e:/temp/acc08143dff000/acc08143dff001.s":3601 '.epcdata':
The symbol has already been defined and cannot be redefined.
[Error ea1008] "e:/temp/acc08143dff000/acc08143dff001.s":3608 '.epcdata.end':
The symbol has already been defined and cannot be redefined.

But if you change the definition to:

extern u64 /*__jiffy_data*/ jiffies_64;
u64 /*__jiffy_data*/ jiffies_64 __cacheline_aligned_in_smp = INITIAL_JIFFIES;

There is no problem.

Guess this has to do with U64 this type of data.