mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bdfa54dfd9
Pull s390 updates from Martin Schwidefsky: "The major change in this merge is the removal of the support for 31-bit kernels. Naturally 31-bit user space will continue to work via the compat layer. And then some cleanup, some improvements and bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (23 commits) s390/smp: wait until secondaries are active & online s390/hibernate: fix save and restore of kernel text section s390/cacheinfo: add missing facility check s390/syscalls: simplify syscall_get_arch() s390/irq: enforce correct irqclass_sub_desc array size s390: remove "64" suffix from mem64.S and swsusp_asm64.S s390/ipl: cleanup macro usage s390/ipl: cleanup shutdown_action attributes s390/ipl: cleanup bin attr usage s390/uprobes: fix address space annotation s390: add missing arch_release_task_struct() declaration s390: make couple of functions and variables static s390/maccess: improve s390_kernel_write() s390/maccess: remove potentially broken probe_kernel_write() s390/watchdog: support for KVM hypervisors and delete pr_info messages s390/watchdog: enable KEEPALIVE for /dev/watchdog s390/dasd: remove setting of scheduler from driver s390/traps: panic() instead of die() on translation exception s390: remove test_facility(2) (== z/Architecture mode active) checks s390/cmpxchg: simplify cmpxchg_double ...
38 lines
792 B
C
38 lines
792 B
C
#ifndef _ASM_S390_JUMP_LABEL_H
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#define _ASM_S390_JUMP_LABEL_H
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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#define JUMP_LABEL_NOP_SIZE 6
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#define JUMP_LABEL_NOP_OFFSET 2
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/*
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* We use a brcl 0,2 instruction for jump labels at compile time so it
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* can be easily distinguished from a hotpatch generated instruction.
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*/
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static __always_inline bool arch_static_branch(struct static_key *key)
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{
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asm_volatile_goto("0: brcl 0,"__stringify(JUMP_LABEL_NOP_OFFSET)"\n"
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".pushsection __jump_table, \"aw\"\n"
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".balign 8\n"
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".quad 0b, %l[label], %0\n"
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".popsection\n"
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: : "X" (key) : : label);
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return false;
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label:
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return true;
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}
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typedef unsigned long jump_label_t;
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struct jump_entry {
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jump_label_t code;
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jump_label_t target;
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jump_label_t key;
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};
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#endif /* __ASSEMBLY__ */
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#endif
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