Where x86_32 passed zero in the high 32 bits, use wrmsrl which
will zero extend for us. This allows ifdefs for 32/64 bit to
be eliminated.
Eliminate ifdef in step.c. Similar cleanup was done when unifying
kprobes_32|64.c and wrmsr() was chosen there over wrmsrl(). This
patch changes these to wrmsrl.
Signed-off-by: Harvey Harrison <[EMAIL PROTECTED]>
---
arch/x86/kernel/kprobes.c | 4 ++--
arch/x86/kernel/step.c | 4 ----
2 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index 53ba6a5..34becd1 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -410,13 +410,13 @@ static void __kprobes set_current_kprobe(struct kprobe
*p, struct pt_regs *regs,
static void __kprobes clear_btf(void)
{
if (test_thread_flag(TIF_DEBUGCTLMSR))
- wrmsr(MSR_IA32_DEBUGCTLMSR, 0, 0);
+ wrmsrl(MSR_IA32_DEBUGCTLMSR, 0L);
}
static void __kprobes restore_btf(void)
{
if (test_thread_flag(TIF_DEBUGCTLMSR))
- wrmsr(MSR_IA32_DEBUGCTLMSR, current->thread.debugctlmsr, 0);
+ wrmsrl(MSR_IA32_DEBUGCTLMSR, current->thread.debugctlmsr);
}
static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs
*regs)
diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index 21ea22f..bf7047d 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -148,11 +148,7 @@ static void write_debugctlmsr(struct task_struct *child,
unsigned long val)
if (child != current)
return;
-#ifdef CONFIG_X86_64
wrmsrl(MSR_IA32_DEBUGCTLMSR, val);
-#else
- wrmsr(MSR_IA32_DEBUGCTLMSR, val, 0);
-#endif
}
/*
--
1.5.4.rc2.1164.g6451
--
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