linux-kernel - [PATCH 4.19.y 0/3] ia64: kprobes: Fix build error on ia64

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Date:   Tue, 26 Apr 2022 23:25:54 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     stable@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     mhiramat@...nel.org, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19.y 0/3] ia64: kprobes: Fix build error on ia64

Hi,

Kernel test bot reported that the ia64 build error on stable 4.19.y because
of the commit d3380de483d5 ("ia64: kprobes: Use generic kretprobe trampoline
handler").
I also found that this commit was involved by the backporting of commit
f5f96e3643dc ("ia64: kprobes: Fix to pass correct trampoline address to the
handler"), and this 2nd commit was backported wrong way. Actually, this 2nd
commit aimed to use dereference_function_descriptor() in kprobes@...4, but
the comment (and Fixes tag) points the 1st commit. Thus I guess this mistake
happened.

So I re-backport the upstream commit a7fe2378454c ("ia64: kprobes: Fix to
pass correct trampoline address to the handler") correctly, without involving
the 1st commit.

Thank you,

---

Masami Hiramatsu (3):
      Revert "ia64: kprobes: Fix to pass correct trampoline address to the handler"
      Revert "ia64: kprobes: Use generic kretprobe trampoline handler"
      ia64: kprobes: Fix to pass correct trampoline address to the handler

 arch/ia64/kernel/kprobes.c |   78 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 75 insertions(+), 3 deletions(-)

--
Masami Hiramatsu (Linaro) <mhiramat@...nel.org>