ENTRY in *.S files

the gdt of a cpu is described like this:

ENTRY(cpu_gdt_table)
    .quad 0x0000000000000000
    ...

while ENTRY is a macro defined in include/linux/linkage.h ike this:

#define ENTRY(name) \
   .globl name; \
   ALIGN; \
   name:

so it means a globally visible label leading a memory of data(gdt)?hmmm