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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-11-25 02:35:13 +1030 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-24 17:52:22 +0100 |
| commit | 68e74568fbe5854952355e942acca51f138096d9 (patch) | |
| tree | 6263627b3b3c7e249f685ba0fe4d76002e882cd0 /kernel/sched_cpupri.h | |
| parent | 4212823fb459eacc8098dd420bb68ebb9917989d (diff) | |
| download | lwn-68e74568fbe5854952355e942acca51f138096d9.tar.gz lwn-68e74568fbe5854952355e942acca51f138096d9.zip | |
sched: convert struct cpupri_vec cpumask_var_t.
Impact: stack usage reduction, (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.
The fact cpupro_init is called both before and after the slab is
available makes for an ugly parameter unfortunately.
We also use cpumask_any_and to get rid of a temporary in cpupri_find.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_cpupri.h')
| -rw-r--r-- | kernel/sched_cpupri.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/sched_cpupri.h b/kernel/sched_cpupri.h index f25811b0f931..642a94ef8a0a 100644 --- a/kernel/sched_cpupri.h +++ b/kernel/sched_cpupri.h @@ -14,7 +14,7 @@ struct cpupri_vec { spinlock_t lock; int count; - cpumask_t mask; + cpumask_var_t mask; }; struct cpupri { @@ -27,7 +27,8 @@ struct cpupri { int cpupri_find(struct cpupri *cp, struct task_struct *p, cpumask_t *lowest_mask); void cpupri_set(struct cpupri *cp, int cpu, int pri); -void cpupri_init(struct cpupri *cp); +int cpupri_init(struct cpupri *cp, bool bootmem); +void cpupri_cleanup(struct cpupri *cp); #else #define cpupri_set(cp, cpu, pri) do { } while (0) #define cpupri_init() do { } while (0) |