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Diffstat (limited to 'arch/x86_64/kernel/vsyscall.c')
-rw-r--r--arch/x86_64/kernel/vsyscall.c22
1 files changed, 4 insertions, 18 deletions
diff --git a/arch/x86_64/kernel/vsyscall.c b/arch/x86_64/kernel/vsyscall.c
index 57660d58d500..06c34949bfdc 100644
--- a/arch/x86_64/kernel/vsyscall.c
+++ b/arch/x86_64/kernel/vsyscall.c
@@ -42,6 +42,7 @@
42#include <asm/segment.h> 42#include <asm/segment.h>
43#include <asm/desc.h> 43#include <asm/desc.h>
44#include <asm/topology.h> 44#include <asm/topology.h>
45#include <asm/vgtod.h>
45 46
46#define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr))) 47#define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
47#define __syscall_clobber "r11","rcx","memory" 48#define __syscall_clobber "r11","rcx","memory"
@@ -57,26 +58,9 @@
57 * - writen by timer interrupt or systcl (/proc/sys/kernel/vsyscall64) 58 * - writen by timer interrupt or systcl (/proc/sys/kernel/vsyscall64)
58 * Try to keep this structure as small as possible to avoid cache line ping pongs 59 * Try to keep this structure as small as possible to avoid cache line ping pongs
59 */ 60 */
60struct vsyscall_gtod_data_t {
61 seqlock_t lock;
62
63 /* open coded 'struct timespec' */
64 time_t wall_time_sec;
65 u32 wall_time_nsec;
66
67 int sysctl_enabled;
68 struct timezone sys_tz;
69 struct { /* extract of a clocksource struct */
70 cycle_t (*vread)(void);
71 cycle_t cycle_last;
72 cycle_t mask;
73 u32 mult;
74 u32 shift;
75 } clock;
76};
77int __vgetcpu_mode __section_vgetcpu_mode; 61int __vgetcpu_mode __section_vgetcpu_mode;
78 62
79struct vsyscall_gtod_data_t __vsyscall_gtod_data __section_vsyscall_gtod_data = 63struct vsyscall_gtod_data __vsyscall_gtod_data __section_vsyscall_gtod_data =
80{ 64{
81 .lock = SEQLOCK_UNLOCKED, 65 .lock = SEQLOCK_UNLOCKED,
82 .sysctl_enabled = 1, 66 .sysctl_enabled = 1,
@@ -96,6 +80,8 @@ void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
96 vsyscall_gtod_data.wall_time_sec = wall_time->tv_sec; 80 vsyscall_gtod_data.wall_time_sec = wall_time->tv_sec;
97 vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec; 81 vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
98 vsyscall_gtod_data.sys_tz = sys_tz; 82 vsyscall_gtod_data.sys_tz = sys_tz;
83 vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
84 vsyscall_gtod_data.wall_to_monotonic = wall_to_monotonic;
99 write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags); 85 write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
100} 86}
101 87