From: Wade Farnsworth <wade_farnsworth@mentor.com>
Date: Tue, 2 Oct 2012 16:08:30 +0000 (+0100)
Subject: ARM: 7548/1: include linux/sched.h in syscall.h
X-Git-Tag: v3.5.7~127
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a13cda3e7a332b57823986b4705216ea5ee1509f;p=thirdparty%2Fkernel%2Fstable.git

ARM: 7548/1: include linux/sched.h in syscall.h

commit 8ef102c6b4bc996ff96ca52b34775fe931ec90c9 upstream.

The syscall tracing patch introduces a compile bug in lttng-modules
when the latter calls syscall_get_nr(), similar to the following:

<path-to-linux>/arch/arm/include/asm/syscall.h:21:2: error: implicit declaration of function 'task_thread_info' [-Werror=implicit-function-declaration]

The issue is that we are using task_thread_info() in the
syscall_get_nr() function in asm/syscall.h, but not explicitly
including sched.h from this file, so we can expect this bug might
surface any time that syscall_get_nr() is called.

Explicitly including sched.h solves the problem.

Signed-off-by: Wade Farnsworth <wade_farnsworth@mentor.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/arm/include/asm/syscall.h b/arch/arm/include/asm/syscall.h
index c334a23ddf759..fce38a684e449 100644
--- a/arch/arm/include/asm/syscall.h
+++ b/arch/arm/include/asm/syscall.h
@@ -8,6 +8,7 @@
 #define _ASM_ARM_SYSCALL_H
 
 #include <linux/err.h>
+#include <linux/sched.h>
 
 extern const unsigned long sys_call_table[];