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| /* SPDX-License-Identifier: GPL-2.0 */
| /*
| * Userland implementation of getcpu() for 64 bits processes in a
| * s390 kernel for use in the vDSO
| *
| * Copyright IBM Corp. 2016
| * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
| */
| #include <asm/vdso.h>
| #include <asm/asm-offsets.h>
| #include <asm/dwarf.h>
|
| .text
| .align 4
| .globl __kernel_getcpu
| .type __kernel_getcpu,@function
| __kernel_getcpu:
| CFI_STARTPROC
| sacf 256
| lm %r4,%r5,__VDSO_GETCPU_VAL(%r0)
| sacf 0
| ltgr %r2,%r2
| jz 2f
| st %r5,0(%r2)
| 2: ltgr %r3,%r3
| jz 3f
| st %r4,0(%r3)
| 3: lghi %r2,0
| br %r14
| CFI_ENDPROC
| .size __kernel_getcpu,.-__kernel_getcpu
|
|
