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authorSrikant Patnaik2015-01-13 15:08:24 +0530
committerSrikant Patnaik2015-01-13 15:08:24 +0530
commit97327692361306d1e6259021bc425e32832fdb50 (patch)
treefe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/alpha/include/asm/percpu.h
parent2d05a8f663478a44e088d122e0d62109bbc801d0 (diff)
parenta3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff)
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dirty fix to merging
Diffstat (limited to 'arch/alpha/include/asm/percpu.h')
-rw-r--r--arch/alpha/include/asm/percpu.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/percpu.h b/arch/alpha/include/asm/percpu.h
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--- /dev/null
+++ b/arch/alpha/include/asm/percpu.h
@@ -0,0 +1,18 @@
+#ifndef __ALPHA_PERCPU_H
+#define __ALPHA_PERCPU_H
+
+/*
+ * To calculate addresses of locally defined variables, GCC uses
+ * 32-bit displacement from the GP. Which doesn't work for per cpu
+ * variables in modules, as an offset to the kernel per cpu area is
+ * way above 4G.
+ *
+ * Always use weak definitions for percpu variables in modules.
+ */
+#if defined(MODULE) && defined(CONFIG_SMP)
+#define ARCH_NEEDS_WEAK_PER_CPU
+#endif
+
+#include <asm-generic/percpu.h>
+
+#endif /* __ALPHA_PERCPU_H */