[PATCH 2/2] jump label: disable due to compiler bug

[Jason Baron]

Unfortunately, we found a compiler bug in the implementation of
'asm goto'. The bug can cause the kernel to crash.

For now, we are disabling jump labels with a big hammer. When the
gcc fix is committed, we will update the kernel with a better check
for either the version number it's fix in, or some detection of
whether gcc has the fix in place.

Signed-off-by: Jason Baron <jbaron@xxxxxxxxxx>
---
 include/linux/jump_label.h |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index b67cb18..954462a 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -1,11 +1,20 @@
 #ifndef _LINUX_JUMP_LABEL_H
 #define _LINUX_JUMP_LABEL_H
 
+/*
+ * A compiler bug was found in the implementation of 'asm goto'. Thus,
+ * we are disabling it for now pending a better check for compiler version
+ * that fixes it.
+ */
+#if 0
+
 #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_HAVE_ARCH_JUMP_LABEL)
 # include <asm/jump_label.h>
 # define HAVE_JUMP_LABEL
 #endif
 
+#endif
+
 enum jump_label_type {
 	JUMP_LABEL_ENABLE,
 	JUMP_LABEL_DISABLE
-- 
1.7.1

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