sched: convert struct root_domain to cpumask_var_t.
authorRusty Russell <rusty@rustcorp.com.au>
Mon, 24 Nov 2008 16:05:05 +0000 (02:05 +1030)
committerIngo Molnar <mingo@elte.hu>
Mon, 24 Nov 2008 16:51:18 +0000 (17:51 +0100)
commitc6c4927b22a3514c6660f0e72c78716226bd3cc8
treeee7fc9031eb14ac1c9d2f0732950b4faae2b6245
parent6a7b3dc3440f7b5a9b67594af01ed562cdeb41e4
sched: convert struct root_domain to cpumask_var_t.

Impact: (future) size reduction for large NR_CPUS.

Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space for small nr_cpu_ids but big CONFIG_NR_CPUS.  cpumask_var_t
is just a struct cpumask for !CONFIG_CPUMASK_OFFSTACK.

def_root_domain is static, and so its masks are initialized with
alloc_bootmem_cpumask_var.  After that, alloc_cpumask_var is used.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/sched.c
kernel/sched_rt.c