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Subject[PATCH v2 04/10] x86_64,vdso: Remove jiffies from the vvar page
Date
I think that the jiffies vvar was once used for the vgetcpu cache.
That code is long gone, so let's just make jiffies be a normal
variable.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
---
arch/x86/include/asm/vvar.h | 1 -
arch/x86/kernel/time.c | 2 +-
arch/x86/vdso/vgetcpu.c | 1 -
3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/vvar.h b/arch/x86/include/asm/vvar.h
index 5d2b9ad..5f6d407 100644
--- a/arch/x86/include/asm/vvar.h
+++ b/arch/x86/include/asm/vvar.h
@@ -44,7 +44,6 @@ extern char __vvar_page;

/* DECLARE_VVAR(offset, type, name) */

-DECLARE_VVAR(0, volatile unsigned long, jiffies)
DECLARE_VVAR(16, int, vgetcpu_mode)
DECLARE_VVAR(128, struct vsyscall_gtod_data, vsyscall_gtod_data)

diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c
index bf7ef5c..822773b 100644
--- a/arch/x86/kernel/time.c
+++ b/arch/x86/kernel/time.c
@@ -23,7 +23,7 @@
#include <asm/time.h>

#ifdef CONFIG_X86_64
-__visible DEFINE_VVAR(volatile unsigned long, jiffies) = INITIAL_JIFFIES;
+__visible volatile unsigned long jiffies __cacheline_aligned = INITIAL_JIFFIES;
#endif

unsigned long profile_pc(struct pt_regs *regs)
diff --git a/arch/x86/vdso/vgetcpu.c b/arch/x86/vdso/vgetcpu.c
index 2f94b03..add1d98 100644
--- a/arch/x86/vdso/vgetcpu.c
+++ b/arch/x86/vdso/vgetcpu.c
@@ -7,7 +7,6 @@

#include <linux/kernel.h>
#include <linux/getcpu.h>
-#include <linux/jiffies.h>
#include <linux/time.h>
#include <asm/vsyscall.h>
#include <asm/vgtod.h>
--
1.9.3


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