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sched: Move cpu masks from kernel/sched.c into kernel/cpu.c

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kernel/cpu.c seems a more logical place for those maps since they do not really
have much to do with the scheduler these days.

kernel/cpu.c is now built for the UP kernel too, but it does not affect the size
the kernel sections.

$ size vmlinux

before
   text       data        bss        dec        hex    filename
3313797     307060     310352    3931209     3bfc49    vmlinux

after
   text       data        bss        dec        hex    filename
3313797     307060     310352    3931209     3bfc49    vmlinux

Signed-off-by: Max Krasnyansky <maxk@qualcomm.com>
Cc: pj@sgi.com
Cc: menage@google.com
Cc: rostedt@goodmis.org
Cc: mingo@elte.hu
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Max Krasnyansky 2008-05-29 11:17:02 -07:00 committed by Ingo Molnar
parent 5c8e1ed1d2
commit 68f4f1ec08
3 changed files with 26 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
kernel/Makefile
View File

@ -3,7 +3,7 @@
#
obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \
exit.o itimer.o time.o softirq.o resource.o \
cpu.o exit.o itimer.o time.o softirq.o resource.o \
sysctl.o capability.o ptrace.o timer.o user.o \
signal.o sys.o kmod.o workqueue.o pid.o \
rcupdate.o extable.o params.o posix-timers.o \
@ -27,7 +27,7 @@ obj-$(CONFIG_RT_MUTEXES) += rtmutex.o
obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
obj-$(CONFIG_SMP) += cpu.o spinlock.o
obj-$(CONFIG_SMP) += spinlock.o
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
obj-$(CONFIG_UID16) += uid16.o

24
kernel/cpu.c
View File

@ -15,6 +15,28 @@
#include <linux/stop_machine.h>
#include <linux/mutex.h>
/*
* Represents all cpu's present in the system
* In systems capable of hotplug, this map could dynamically grow
* as new cpu's are detected in the system via any platform specific
* method, such as ACPI for e.g.
*/
cpumask_t cpu_present_map __read_mostly;
EXPORT_SYMBOL(cpu_present_map);
#ifndef CONFIG_SMP
/*
* Represents all cpu's that are currently online.
*/
cpumask_t cpu_online_map __read_mostly = CPU_MASK_ALL;
EXPORT_SYMBOL(cpu_online_map);
cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
EXPORT_SYMBOL(cpu_possible_map);
#else /* CONFIG_SMP */
/* Serializes the updates to cpu_online_map, cpu_present_map */
static DEFINE_MUTEX(cpu_add_remove_lock);
@ -403,3 +425,5 @@ out:
cpu_maps_update_done();
}
#endif /* CONFIG_PM_SLEEP_SMP */
#endif /* CONFIG_SMP */

18
kernel/sched.c
View File

@ -5080,24 +5080,6 @@ asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len,
return sched_setaffinity(pid, &new_mask);
}
/*
* Represents all cpu's present in the system
* In systems capable of hotplug, this map could dynamically grow
* as new cpu's are detected in the system via any platform specific
* method, such as ACPI for e.g.
*/
cpumask_t cpu_present_map __read_mostly;
EXPORT_SYMBOL(cpu_present_map);
#ifndef CONFIG_SMP
cpumask_t cpu_online_map __read_mostly = CPU_MASK_ALL;
EXPORT_SYMBOL(cpu_online_map);
cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
EXPORT_SYMBOL(cpu_possible_map);
#endif
long sched_getaffinity(pid_t pid, cpumask_t *mask)
{
struct task_struct *p;