linux-kernel - [tip:x86/core] x86/kprobes: Make trampoline

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Date:   Fri, 19 Apr 2019 08:58:46 -0700
From:   tip-bot for Andi Kleen <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        tglx@...utronix.de, hpa@...or.com, mhiramat@...nel.org,
        mingo@...nel.org
Subject: [tip:x86/core] x86/kprobes: Make trampoline_handler() global and
 visible

Commit-ID:  6ea26c21941cc313bc05f340019fe454900d21bd
Gitweb:     https://git.kernel.org/tip/6ea26c21941cc313bc05f340019fe454900d21bd
Author:     Andi Kleen <ak@...ux.intel.com>
AuthorDate: Fri, 29 Mar 2019 17:47:41 -0700
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 19 Apr 2019 17:55:30 +0200

x86/kprobes: Make trampoline_handler() global and visible

This function is referenced from assembler, so in LTO
it needs to be global and visible to not be optimized away.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
Link: https://lkml.kernel.org/r/20190330004743.29541-7-andi@firstfloor.org

---
 arch/x86/kernel/kprobes/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index a034cb808e7e..a7b2a5c4d969 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -751,7 +751,7 @@ STACK_FRAME_NON_STANDARD(kretprobe_trampoline);
 /*
  * Called from kretprobe_trampoline
  */
-static __used void *trampoline_handler(struct pt_regs *regs)
+__used __visible void *trampoline_handler(struct pt_regs *regs)
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;