From: Balbir Singh <bsingharora@gmail.com>
Date: Tue, 6 Jun 2017 04:29:38 +0000 (+1000)
Subject: powerpc/kprobes: Move kprobes over to patch_instruction()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d07df82c43be82ab6972662180e89e6ba2a828ad;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

powerpc/kprobes: Move kprobes over to patch_instruction()

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>
---

diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 01addfb0ed0a..45f1ff721c32 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -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);