b0b3b2c78e
Convert powerpc to relative jump labels.
Before the patch, pseries_defconfig vmlinux.o has:
9074 __jump_table 0003f2a0 0000000000000000 0000000000000000 01321fa8 2**0
With the patch, the same config gets:
9074 __jump_table 0002a0e0 0000000000000000 0000000000000000 01321fb4 2**0
Size is 258720 without the patch, 172256 with the patch.
That's a 33% size reduction.
Largely copied from commit c296146c05 ("arm64/kernel: jump_label:
Switch to relative references")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/828348da7868eda953ce023994404dfc49603b64.1616514473.git.christophe.leroy@csgroup.eu
21 lines
513 B
C
21 lines
513 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2010 Michael Ellerman, IBM Corp.
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*/
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#include <linux/kernel.h>
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#include <linux/jump_label.h>
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#include <asm/code-patching.h>
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#include <asm/inst.h>
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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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struct ppc_inst *addr = (struct ppc_inst *)jump_entry_code(entry);
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if (type == JUMP_LABEL_JMP)
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patch_branch(addr, jump_entry_target(entry), 0);
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else
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patch_instruction(addr, ppc_inst(PPC_INST_NOP));
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}
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