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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-07-20 11:15:08 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-07-20 11:15:08 +0200 |
| commit | 27f6b416626a240e1b46f646d2e0c5266f4eac95 (patch) | |
| tree | 4549855d7996ce9d18e1586e2f0bfb5fa5835718 /arch/s390/kernel/asm-offsets.c | |
| parent | s390/dis: Add the servc instruction to the disassembler. (diff) | |
| download | linux-27f6b416626a240e1b46f646d2e0c5266f4eac95.tar.xz linux-27f6b416626a240e1b46f646d2e0c5266f4eac95.zip | |
s390/vtimer: rework virtual timer interface
The current virtual timer interface is inherently per-cpu and hard to
use. The sole user of the interface is appldata which uses it to execute
a function after a specific amount of cputime has been used over all cpus.
Rework the virtual timer interface to hook into the cputime accounting.
This makes the interface independent from the CPU timer interrupts, and
makes the virtual timers global as opposed to per-cpu.
Overall the code is greatly simplified. The downside is that the accuracy
is not as good as the original implementation, but it is still good enough
for appldata.
Reviewed-by: Jan Glauber <jang@linux.vnet.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/asm-offsets.c')
| -rw-r--r-- | arch/s390/kernel/asm-offsets.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index 0e974ddd156b..45ef1a7b08f9 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -9,7 +9,6 @@ #include <linux/kbuild.h> #include <linux/sched.h> #include <asm/cputime.h> -#include <asm/timer.h> #include <asm/vdso.h> #include <asm/pgtable.h> @@ -72,11 +71,10 @@ int main(void) DEFINE(__CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC); BLANK(); /* idle data offsets */ - DEFINE(__IDLE_ENTER, offsetof(struct s390_idle_data, idle_enter)); - DEFINE(__IDLE_EXIT, offsetof(struct s390_idle_data, idle_exit)); - /* vtimer queue offsets */ - DEFINE(__VQ_IDLE_ENTER, offsetof(struct vtimer_queue, idle_enter)); - DEFINE(__VQ_IDLE_EXIT, offsetof(struct vtimer_queue, idle_exit)); + DEFINE(__CLOCK_IDLE_ENTER, offsetof(struct s390_idle_data, clock_idle_enter)); + DEFINE(__CLOCK_IDLE_EXIT, offsetof(struct s390_idle_data, clock_idle_exit)); + DEFINE(__TIMER_IDLE_ENTER, offsetof(struct s390_idle_data, timer_idle_enter)); + DEFINE(__TIMER_IDLE_EXIT, offsetof(struct s390_idle_data, timer_idle_exit)); /* lowcore offsets */ DEFINE(__LC_EXT_PARAMS, offsetof(struct _lowcore, ext_params)); DEFINE(__LC_EXT_CPU_ADDR, offsetof(struct _lowcore, ext_cpu_addr)); |