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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/ia64/include/asm/percpu.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/ia64/include/asm/percpu.h')
-rw-r--r--kernel/arch/ia64/include/asm/percpu.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/kernel/arch/ia64/include/asm/percpu.h b/kernel/arch/ia64/include/asm/percpu.h
new file mode 100644
index 000000000..0ec484d2d
--- /dev/null
+++ b/kernel/arch/ia64/include/asm/percpu.h
@@ -0,0 +1,54 @@
+#ifndef _ASM_IA64_PERCPU_H
+#define _ASM_IA64_PERCPU_H
+
+/*
+ * Copyright (C) 2002-2003 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
+
+#ifdef __ASSEMBLY__
+# define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */
+#else /* !__ASSEMBLY__ */
+
+
+#include <linux/threads.h>
+
+#ifdef CONFIG_SMP
+
+#ifdef HAVE_MODEL_SMALL_ATTRIBUTE
+# define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__)))
+#endif
+
+#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset)
+
+extern void *per_cpu_init(void);
+
+#else /* ! SMP */
+
+#define per_cpu_init() (__phys_per_cpu_start)
+
+#endif /* SMP */
+
+#define PER_CPU_BASE_SECTION ".data..percpu"
+
+/*
+ * Be extremely careful when taking the address of this variable! Due to virtual
+ * remapping, it is different from the canonical address returned by this_cpu_ptr(&var)!
+ * On the positive side, using __ia64_per_cpu_var() instead of this_cpu_ptr() is slightly
+ * more efficient.
+ */
+#define __ia64_per_cpu_var(var) (*({ \
+ __verify_pcpu_ptr(&(var)); \
+ ((typeof(var) __kernel __force *)&(var)); \
+}))
+
+#include <asm-generic/percpu.h>
+
+/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
+DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_IA64_PERCPU_H */