[RFC PATCH -tip 8/9] error-injection: Fix to not enabling preemption in pre_handler

From: Masami Hiramatsu
Date: Fri Mar 09 2018 - 07:39:46 EST


Since kprobes pre_handler doesn't need to recover preemption
even if it modifies regs->ip anymore, this fixes to remove
the preempt_enable_no_resched() from pre_handler.

Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
---
kernel/fail_function.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/kernel/fail_function.c b/kernel/fail_function.c
index 21b0122cb39c..b1713521f096 100644
--- a/kernel/fail_function.c
+++ b/kernel/fail_function.c
@@ -176,7 +176,6 @@ static int fei_kprobe_handler(struct kprobe *kp, struct pt_regs *regs)
override_function_with_return(regs);
/* Kprobe specific fixup */
reset_current_kprobe();
- preempt_enable_no_resched();
return 1;
}