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e9666d10a5
Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label". The jump label is controlled by HAVE_JUMP_LABEL, which is defined like this: #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) # define HAVE_JUMP_LABEL #endif We can improve this by testing 'asm goto' support in Kconfig, then make JUMP_LABEL depend on CC_HAS_ASM_GOTO. Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will match to the real kernel capability. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
36 lines
816 B
C
36 lines
816 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <linux/jump_label.h>
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#include <asm/patch.h>
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#include <asm/insn.h>
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static void __arch_jump_label_transform(struct jump_entry *entry,
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enum jump_label_type type,
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bool is_static)
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{
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void *addr = (void *)entry->code;
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unsigned int insn;
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if (type == JUMP_LABEL_JMP)
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insn = arm_gen_branch(entry->code, entry->target);
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else
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insn = arm_gen_nop();
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if (is_static)
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__patch_text_early(addr, insn);
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else
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patch_text(addr, insn);
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}
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void arch_jump_label_transform(struct jump_entry *entry,
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enum jump_label_type type)
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{
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__arch_jump_label_transform(entry, type, false);
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}
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void arch_jump_label_transform_static(struct jump_entry *entry,
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enum jump_label_type type)
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{
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__arch_jump_label_transform(entry, type, true);
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}
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