linux-kernel - Re: [v4,4/6] powerpc: kprobes: add support for KPROBES_ON

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Date:   Tue, 25 Apr 2017 08:47:31 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [v4,4/6] powerpc: kprobes: add support for KPROBES_ON_FTRACE

On Wed, 2017-04-19 at 12:52:26 UTC, "Naveen N. Rao" wrote:
> Allow kprobes to be placed on ftrace _mcount() call sites. This
> optimization avoids the use of a trap, by riding on ftrace
> infrastructure.
> 
> This depends on HAVE_DYNAMIC_FTRACE_WITH_REGS which depends on
> MPROFILE_KERNEL, which is only currently enabled on powerpc64le with
> newer toolchains.
> 
> Based on the x86 code by Masami.
> 
> Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/ead514d5fb30a0889d51c0f0e35c3e

cheers