PT_REGS_FS         28 include/asm-um/ptrace-i386.h #define PT_REGS_FS(r) UPT_FS(&(r)->regs)
PT_REGS_FS         45 include/asm-um/ptrace-x86_64.h #define PT_REGS_FS(r) UPT_FS(&(r)->regs)