adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-28 03:36:19 +00:00
Code Issues Projects Releases Packages Wiki Activity

clockevents: Use u32 for mult and shift factors

Browse source 
The mult and shift factors of clock events differ in their data type
from those of clock sources for no reason. u32 is sufficient for
both. shift is always <= 32 and mult is limited to 2^32-1 to avoid
64bit multiplication overflows in the conversion.

Preparatory patch for a generic mult/shift factor calculation
function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Mikael Pettersson <mikpe@it.uu.se>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <20091111134229.725664788@linutronix.de>
This commit is contained in:
Thomas Gleixner 2009-11-11 14:05:25 +00:00
parent 3c5d92a0cf
commit 23af368e9a
2 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
include/linux/clockchips.h
View file

@ -79,8 +79,8 @@ struct clock_event_device {
unsigned int features;
unsigned long max_delta_ns;
unsigned long min_delta_ns;
unsigned long mult;
int shift;
u32 mult;
u32 shift;
int rating;
int irq;
const struct cpumask *cpumask;

4
kernel/time/timer_list.c
View file

@ -206,8 +206,8 @@ print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
SEQ_printf(m, "%s\n", dev->name);
SEQ_printf(m, " max_delta_ns: %lu\n", dev->max_delta_ns);
SEQ_printf(m, " min_delta_ns: %lu\n", dev->min_delta_ns);
SEQ_printf(m, " mult: %lu\n", dev->mult);
SEQ_printf(m, " shift: %d\n", dev->shift);
SEQ_printf(m, " mult: %u\n", dev->mult);
SEQ_printf(m, " shift: %u\n", dev->shift);
SEQ_printf(m, " mode: %d\n", dev->mode);
SEQ_printf(m, " next_event: %Ld nsecs\n",
(unsigned long long) ktime_to_ns(dev->next_event));