arch/all-pc/kernel/issuper.s

   1         .text
   2         .align  16
   3         .globl  Kernel_13_KrnIsSuper
   4         .type   Kernel_13_KrnIsSuper, @function
   5
   6 Kernel_13_KrnIsSuper:
   7         mov     %cs, %ax
   8         and     $0x03, %eax             // Lower two bits are CPL
   9         xor     $0x03, %eax             // 0x03 will give zero, 0x00 will give nonzero
  10         ret
  11
  12         .size  Kernel_13_KrnIsSuper, .-Kernel_13_KrnIsSuper