From: Steven Rostedt <rostedt@goodmis.org>
To: Qian Cai <cai@lca.pw>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: powerpc ftrace broken due to "manual merge of the ftrace tree with the arm64 tree"
Date: Mon, 18 Nov 2019 09:51:04 -0500 [thread overview]
Message-ID: <20191118095104.0daebbc3@oasis.local.home> (raw)
In-Reply-To: <1573851994.5937.138.camel@lca.pw>
On Fri, 15 Nov 2019 16:06:34 -0500
Qian Cai <cai@lca.pw> wrote:
> > Test this commit please: b83b43ffc6e4b514ca034a0fbdee01322e2f7022
>
> # git reset --hard b83b43ffc6e4b514ca034a0fbdee01322e2f7022
>
> Yes, that one is bad.
Can you see if this patch fixes the issue for you?
Thanks!
-- Steve
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 0f358be551cd..fd8f4dc661dc 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -109,6 +109,13 @@
#define MEM_DISCARD(sec) *(.mem##sec)
#endif
+/* PowerPC defines ftrace_graph_stub in the code */
+#ifndef CONFIG_PPC
+# define DEFINE_FTRACE_GRAPH_STUB ftrace_graph_stub = ftrace_stub;
+#else
+# define DEFINE_FTRACE_GRAPH_STUB
+#endif
+
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
#ifdef CC_USING_PATCHABLE_FUNCTION_ENTRY
/*
@@ -120,17 +127,17 @@
__start_mcount_loc = .; \
KEEP(*(__patchable_function_entries)) \
__stop_mcount_loc = .; \
- ftrace_graph_stub = ftrace_stub;
+ DEFINE_FTRACE_GRAPH_STUB
#else
#define MCOUNT_REC() . = ALIGN(8); \
__start_mcount_loc = .; \
KEEP(*(__mcount_loc)) \
__stop_mcount_loc = .; \
- ftrace_graph_stub = ftrace_stub;
+ DEFINE_FTRACE_GRAPH_STUB
#endif
#else
# ifdef CONFIG_FUNCTION_TRACER
-# define MCOUNT_REC() ftrace_graph_stub = ftrace_stub;
+# define MCOUNT_REC() DEFINE_FTRACE_GRAPH_STUB
# else
# define MCOUNT_REC()
# endif
next prev parent reply other threads:[~2019-11-18 14:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 20:28 powerpc ftrace broken due to "manual merge of the ftrace tree with the arm64 tree" Qian Cai
2019-11-15 21:02 ` Steven Rostedt
2019-11-15 21:06 ` Qian Cai
2019-11-18 14:51 ` Steven Rostedt [this message]
2019-11-18 14:58 ` Steven Rostedt
2019-11-18 15:16 ` Steven Rostedt
2019-11-18 17:11 ` Qian Cai
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