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powerpc/kprobes: Move kprobes over to patch_instruction()

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arch_arm/disarm_probe() use direct assignment for copying
instructions, replace them with patch_instruction(). We don't need to
call flush_icache_range() because patch_instruction() does it for us.

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Balbir Singh 2017-06-06 14:29:38 +10:00 committed by Michael Ellerman
parent 7f6d498ed3
commit d07df82c43
1 changed files with 2 additions and 6 deletions
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8
arch/powerpc/kernel/kprobes.c
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@ -164,17 +164,13 @@ NOKPROBE_SYMBOL(arch_prepare_kprobe);
void arch_arm_kprobe(struct kprobe *p)
{
*p->addr = BREAKPOINT_INSTRUCTION;
flush_icache_range((unsigned long) p->addr,
(unsigned long) p->addr + sizeof(kprobe_opcode_t));
patch_instruction(p->addr, BREAKPOINT_INSTRUCTION);
}
NOKPROBE_SYMBOL(arch_arm_kprobe);
void arch_disarm_kprobe(struct kprobe *p)
{
*p->addr = p->opcode;
flush_icache_range((unsigned long) p->addr,
(unsigned long) p->addr + sizeof(kprobe_opcode_t));
patch_instruction(p->addr, p->opcode);
}
NOKPROBE_SYMBOL(arch_disarm_kprobe);