entry.S table

Hello;
Can anyone tell me what ENTRY(ret_from_intr) is? Is it a function, a macro or is it something completly different? The table entry.S has a number of entries like this and I have not been able to find what an ENTRY() is...Thanks

This ENTRY() is a macro. It makes up beginning code of a procedure in assembly language

Code:

---

#define ENTRY(name)        \
        .align 32;        \
        .proc name;        \
name:

---