x86, vdso: Move the vvar and hpet mappings next to the 64-bit vDSO

This makes the 64-bit and x32 vdsos use the same mechanism as the
32-bit vdso.  Most of the churn is deleting all the old fixmap code.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/8af87023f57f6bb96ec8d17fce3f88018195b49b.1399317206.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 5 insertions, 17 deletions

diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c
index 091554c20bc9..b2e4f493e5b0 100644
--- a/arch/x86/vdso/vclock_gettime.c
+++ b/arch/x86/vdso/vclock_gettime.c
@@ -30,9 +30,12 @@ extern int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz);
 extern time_t __vdso_time(time_t *t);
 
 #ifdef CONFIG_HPET_TIMER
-static inline u32 read_hpet_counter(const volatile void *addr)
+extern u8 hpet_page
+	__attribute__((visibility("hidden")));
+
+static notrace cycle_t vread_hpet(void)
 {
-	return *(const volatile u32 *) (addr + HPET_COUNTER);
+	return *(const volatile u32 *)(&hpet_page + HPET_COUNTER);
 }
 #endif
 
@@ -43,11 +46,6 @@ static inline u32 read_hpet_counter(const volatile void *addr)
 #include <asm/fixmap.h>
 #include <asm/pvclock.h>
 
-static notrace cycle_t vread_hpet(void)
-{
-	return read_hpet_counter((const void *)fix_to_virt(VSYSCALL_HPET));
-}
-
 notrace static long vdso_fallback_gettime(long clock, struct timespec *ts)
 {
 	long ret;
@@ -137,16 +135,6 @@ static notrace cycle_t vread_pvclock(int *mode)
 
 #else
 
-extern u8 hpet_page
-	__attribute__((visibility("hidden")));
-
-#ifdef CONFIG_HPET_TIMER
-static notrace cycle_t vread_hpet(void)
-{
-	return read_hpet_counter((const void *)(&hpet_page));
-}
-#endif
-
 notrace static long vdso_fallback_gettime(long clock, struct timespec *ts)
 {
 	long ret;