linux-kernel - [PATCH] perf tools: Fix compilation on powerpc

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Date:	Tue, 24 Nov 2009 15:19:43 +1100
From:	Paul Mackerras <paulus@...ba.org>
To:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>
CC:	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: [PATCH] perf tools: Fix compilation on powerpc

Currently, perf fails to compile on powerpc with this error:

    CC util/header.o
In file included from util/../perf.h:17,
                 from util/header.c:9:
util/../../../arch/powerpc/include/asm/unistd.h:360:27: error: linux/linkage.h: No such file or directory
make: *** [util/header.o] Error 1

The reason is that we still have a #define __KERNEL__ in effect at the
point where <asm/unistd.h> gets included, which means we get extra
stuff that we don't need or want.

This fixes the problem by undefining __KERNEL__ once we have included
the file for which we need __KERNEL__ defined.

Signed-off-by: Paul Mackerras <paulus@...ba.org>
---
 tools/perf/util/include/linux/bitops.h |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/include/linux/bitops.h b/tools/perf/util/include/linux/bitops.h
index ace57c3..8d63116 100644
--- a/tools/perf/util/include/linux/bitops.h
+++ b/tools/perf/util/include/linux/bitops.h
@@ -7,6 +7,8 @@
 #define CONFIG_GENERIC_FIND_FIRST_BIT
 #include "../../../../include/linux/bitops.h"
 
+#undef __KERNEL__
+
 static inline void set_bit(int nr, unsigned long *addr)
 {
 	addr[nr / BITS_PER_LONG] |= 1UL << (nr % BITS_PER_LONG);
--
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