mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-04-29 12:28:27 +02:00
Thomas Huth
287d163322
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize now on the __ASSEMBLER__ macro that is provided by the compilers. This is a mostly mechanical patch (done with a simple "sed -i" statement), except for the following files where comments with mis-spelled macros were tweaked manually: arch/arm64/include/asm/stacktrace/frame.h arch/arm64/include/asm/kvm_ptrauth.h arch/arm64/include/asm/debug-monitors.h arch/arm64/include/asm/esr.h arch/arm64/include/asm/scs.h arch/arm64/include/asm/memory.h Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013 Huawei Ltd.
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* Author: Jiang Liu <liuj97@gmail.com>
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*
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* Based on arch/arm/include/asm/jump_label.h
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*/
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#ifndef __ASM_JUMP_LABEL_H
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#define __ASM_JUMP_LABEL_H
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#ifndef __ASSEMBLER__
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#include <linux/types.h>
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#include <asm/insn.h>
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#define HAVE_JUMP_LABEL_BATCH
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#define JUMP_LABEL_NOP_SIZE AARCH64_INSN_SIZE
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#define JUMP_TABLE_ENTRY(key, label) \
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".pushsection __jump_table, \"aw\"\n\t" \
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".align 3\n\t" \
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".long 1b - ., " label " - .\n\t" \
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".quad " key " - .\n\t" \
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".popsection\n\t"
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/* This macro is also expanded on the Rust side. */
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#define ARCH_STATIC_BRANCH_ASM(key, label) \
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"1: nop\n\t" \
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JUMP_TABLE_ENTRY(key, label)
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static __always_inline bool arch_static_branch(struct static_key * const key,
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const bool branch)
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{
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char *k = &((char *)key)[branch];
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asm goto(
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ARCH_STATIC_BRANCH_ASM("%c0", "%l[l_yes]")
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: : "i"(k) : : l_yes
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);
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return false;
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l_yes:
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return true;
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}
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static __always_inline bool arch_static_branch_jump(struct static_key * const key,
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const bool branch)
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{
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char *k = &((char *)key)[branch];
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asm goto(
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"1: b %l[l_yes] \n\t"
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JUMP_TABLE_ENTRY("%c0", "%l[l_yes]")
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: : "i"(k) : : l_yes
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);
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return false;
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l_yes:
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return true;
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}
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#endif /* __ASSEMBLER__ */
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#endif /* __ASM_JUMP_LABEL_H */
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