From: Aneesh Kumar K.V <aneesh.kumar@gmail.com>
Date: Sat, 10 Feb 2007 09:43:22 +0000 (-0800)
Subject: [PATCH] Alpha: increase PERCPU_ENOUGH_ROOM
X-Git-Tag: v3.12-rc1~31520^2~459
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=65fdc8544f7d27df95256cbcfc2a53fa0fa38134;p=kernel%2Fkernel-generic.git

[PATCH] Alpha: increase PERCPU_ENOUGH_ROOM

Module loading on Alpha was failing with error "Could not allocate 8 bytes
percpu data".

Looking at dmesg we have the below error "No per-cpu room for modules."

Increase the PERCPU_ENOUGH_ROOM in a similar way as x86_64

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@gmail.com>
Cc: <Jay.Estabrook@hp.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/asm-alpha/percpu.h b/include/asm-alpha/percpu.h
index 48348fe..651ebb1 100644
--- a/include/asm-alpha/percpu.h
+++ b/include/asm-alpha/percpu.h
@@ -1,6 +1,20 @@
 #ifndef __ALPHA_PERCPU_H
 #define __ALPHA_PERCPU_H
 
+/*
+ * Increase the per cpu area for Alpha so that
+ * modules using percpu area can load.
+ */
+#ifdef CONFIG_MODULES
+# define PERCPU_MODULE_RESERVE 8192
+#else
+# define PERCPU_MODULE_RESERVE 0
+#endif
+
+#define PERCPU_ENOUGH_ROOM \
+	(ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
+	 PERCPU_MODULE_RESERVE)
+
 #include <asm-generic/percpu.h>
 
 #endif /* __ALPHA_PERCPU_H */