linux-kernel - [PATCH] lz4: fix KERNEL

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Date:   Wed,  8 Feb 2017 22:19:23 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] lz4: fix KERNEL_LZ4 support

The updated lz4 library removed the #ifdef guards around the various
EXPORT_SYMBOL statements in the original kernel lz4 support, which broke
CONFIG_KERNEL_LZ4 on x86:

x86_64-linux-ld: -r and -pie may not be used together
scripts/Makefile.build:308: recipe for target 'arch/x86/boot/compressed/misc.o' failed

This uses a simpler way to do the same thing, by overriding the
EXPORT_SYMBOL macro.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 lib/lz4/lz4_decompress.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
index 9bf918233749..a390f63bc475 100644
--- a/lib/lz4/lz4_decompress.c
+++ b/lib/lz4/lz4_decompress.c
@@ -40,6 +40,11 @@
 #include <linux/kernel.h>
 #include <asm/unaligned.h>
 
+#ifdef STATIC
+#undef EXPORT_SYMBOL
+#define EXPORT_SYMBOL(x)
+#endif
+
 /*-*****************************
  *	Decompression functions
  *******************************/
-- 
2.9.0