linux-kernel - [tip:x86/urgent] x86: Fix false positive section mismatch in es7000

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Date:	Mon, 13 Jul 2009 16:57:41 GMT
From:	tip-bot for Rakib Mullick <rakib.mullick@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	rakib.mullick@...il.com, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:x86/urgent] x86: Fix false positive section mismatch in es7000_32.c

Commit-ID:  151586d0f70405d99324d89aea13706cf6d7f993
Gitweb:     http://git.kernel.org/tip/151586d0f70405d99324d89aea13706cf6d7f993
Author:     Rakib Mullick <rakib.mullick@...il.com>
AuthorDate: Sun, 12 Jul 2009 17:04:12 +0600
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 13 Jul 2009 11:03:26 +0200

x86: Fix false positive section mismatch in es7000_32.c

The variable apic_es7000_cluster references the function __cpuinit
wakeup_secondary_cpu_via_mip() from a noninit section. So we've been
warned by the following warning. To avoid possible collision between
init/noninit, its best to mark the variable as __refdata.

We were warned by the following warning:

  LD      arch/x86/kernel/apic/built-in.o
  WARNING: arch/x86/kernel/apic/built-in.o(.data+0x198c): Section
  mismatch in reference from the variable apic_es7000_cluster to the
  function .cpuinit.text:wakeup_secondary_cpu_via_mip()

Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>
LKML-Reference: <b9df5fa10907120404k6279a10ch5e9682432272706f@...l.gmail.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/kernel/apic/es7000_32.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c
index 69328ac..8952a58 100644
--- a/arch/x86/kernel/apic/es7000_32.c
+++ b/arch/x86/kernel/apic/es7000_32.c
@@ -652,7 +652,8 @@ static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
 	return ret && es7000_apic_is_cluster();
 }
 
-struct apic apic_es7000_cluster = {
+/* We've been warned by a false positive warning.Use __refdata to keep calm. */
+struct apic __refdata apic_es7000_cluster = {
 
 	.name				= "es7000",
 	.probe				= probe_es7000,
--
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