2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 04:34:11 +08:00
linux-next/arch/ia64/kernel/fsyscall_gtod_data.h
Thomas Gleixner 74a622be3d ia64: vsyscall: Use seqcount instead of seqlock
The update of the vdso data happens under xtime_lock, so adding a
nested lock is pointless. Just use a seqcount to sync the readers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
2012-03-15 18:17:59 -07:00

24 lines
497 B
C

/*
* (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
* Contributed by Peter Keilty <peter.keilty@hp.com>
*
* fsyscall gettimeofday data
*/
struct fsyscall_gtod_data_t {
seqcount_t seq;
struct timespec wall_time;
struct timespec monotonic_time;
cycle_t clk_mask;
u32 clk_mult;
u32 clk_shift;
void *clk_fsys_mmio;
cycle_t clk_cycle_last;
} ____cacheline_aligned;
struct itc_jitter_data_t {
int itc_jitter;
cycle_t itc_lastcycle;
} ____cacheline_aligned;