Defined in 3 files as a macro:
- external/gpl3/gcc/dist/libgcc/config/arm/linux-atomic.c, line 78 (as a macro)
- external/gpl3/gcc/dist/libgcc/config/m68k/linux-atomic.c, line 86 (as a macro)
- external/gpl3/gcc/dist/libgcc/config/nios2/linux-atomic.c, line 88 (as a macro)