[PATCH 3.13 040/187] x86, espfix: Move espfix definitions into a separate header file

Kamal Mostafa
2014-09-15T22:19:50Z

From: "H. Peter Anvin" <hpa@linux.intel.com>

commit e1fe9ed8d2a4937510d0d60e20705035c2609aea upstream.

Sparse warns that the percpu variables aren't declared before they are
defined. Rather than hacking around it, move espfix definitions into
a proper header file.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
arch/x86/include/asm/espfix.h | 16 ++++++++++++++++
arch/x86/include/asm/setup.h | 5 ++---
arch/x86/kernel/espfix_64.c | 1 +
3 files changed, 19 insertions(+), 3 deletions(-)
create mode 100644 arch/x86/include/asm/espfix.h

diff --git a/arch/x86/include/asm/espfix.h b/arch/x86/include/asm/espfix.h
new file mode 100644
index 0000000..729051c
--- /dev/null
+++ b/arch/x86/include/asm/espfix.h
@@ -0,0 +1,16 @@
+#ifdef _ASM_X86_ESPFIX_H
+#define _ASM_X86_ESPFIX_H
+
+#ifdef CONFIG_X86_64
+
+#include <asm/percpu.h>
+
+DECLARE_PER_CPU_READ_MOSTLY(unsigned long, espfix_stack);
+DECLARE_PER_CPU_READ_MOSTLY(unsigned long, espfix_waddr);
+
+extern void init_espfix_bsp(void);
+extern void init_espfix_ap(void);
+
+#endif /* CONFIG_X86_64 */
+
+#endif /* _ASM_X86_ESPFIX_H */
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index edfaf6a..c2003c0 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -62,11 +62,10 @@ extern void x86_ce4100_early_setup(void);
static inline void x86_ce4100_early_setup(void) { }
#endif

-extern void init_espfix_bsp(void);
-extern void init_espfix_ap(void);
-
#ifndef _SETUP

+#include <asm/espfix.h>
+
/*
* This is set up by the setup-routine at boot-time
*/
diff --git a/arch/x86/kernel/espfix_64.c b/arch/x86/kernel/espfix_64.c
index 8a64da3..6afbb16 100644
--- a/arch/x86/kernel/espfix_64.c
+++ b/arch/x86/kernel/espfix_64.c
@@ -40,6 +40,7 @@
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/setup.h>
+#include <asm/espfix.h>

/*
* Note: we only need 6*8 = 48 bytes for the espfix stack, but round
--
1.9.1