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f0ef0b02af
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembler code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This is bad since macros starting with two underscores are names that are reserved by the C language. It can also be very confusing for the developers when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's now standardize on the __ASSEMBLER__ macro that is provided by the compilers. This is almost a completely mechanical patch (done with a simple "sed -i" statement), with one comment tweaked manually in the arch/loongarch/include/asm/cpu.h file (it was missing the trailing underscores). Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2023 Loongson Technology Corporation Limited
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*
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* Based on arch/arm64/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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#define JUMP_LABEL_NOP_SIZE 4
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/* This macro is also expanded on the Rust side. */
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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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#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, const bool branch)
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{
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asm goto(
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ARCH_STATIC_BRANCH_ASM("%0", "%l[l_yes]")
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: : "i"(&((char *)key)[branch]) : : l_yes);
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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, const bool branch)
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{
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asm goto(
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"1: b %l[l_yes] \n\t"
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JUMP_TABLE_ENTRY("%0", "%l[l_yes]")
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: : "i"(&((char *)key)[branch]) : : l_yes);
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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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