cpuset: remove remaining pointers to cpumask_t

Impact: cleanups, use new cpumask API

Final trivial cleanups: mainly s/cpumask_t/struct cpumask

Note there is a FIXME in generate_sched_domains(). A future patch will
change struct cpumask *doms to struct cpumask *doms[].
(I suppose Rusty will do this.)

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Mike Travis <travis@sgi.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index 51ea2bd..90c6074 100644 (file)
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -20,8 +20,9 @@ extern int number_of_cpusets; /* How many cpusets are defined in system? */
 extern int cpuset_init_early(void);
 extern int cpuset_init(void);
 extern void cpuset_init_smp(void);
-extern void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask);
-extern void cpuset_cpus_allowed_locked(struct task_struct *p, cpumask_t *mask);
+extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
+extern void cpuset_cpus_allowed_locked(struct task_struct *p,
+                                      struct cpumask *mask);
 extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
 #define cpuset_current_mems_allowed (current->mems_allowed)
 void cpuset_init_current_mems_allowed(void);
@@ -86,12 +87,13 @@ static inline int cpuset_init_early(void) { return 0; }
 static inline int cpuset_init(void) { return 0; }
 static inline void cpuset_init_smp(void) {}
 
-static inline void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask)
+static inline void cpuset_cpus_allowed(struct task_struct *p,
+                                      struct cpumask *mask)
 {
        *mask = cpu_possible_map;
 }
 static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
-                                                               cpumask_t *mask)
+                                             struct cpumask *mask)
 {
        *mask = cpu_possible_map;
 }

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index fc294aa..647c77a 100644 (file)
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -289,7 +289,8 @@ static struct file_system_type cpuset_fs_type = {
  * Call with callback_mutex held.
  */
 
-static void guarantee_online_cpus(const struct cpuset *cs, cpumask_t *pmask)
+static void guarantee_online_cpus(const struct cpuset *cs,
+                                 struct cpumask *pmask)
 {
        while (cs && !cpumask_intersects(cs->cpus_allowed, cpu_online_mask))
                cs = cs->parent;
@@ -610,7 +611,8 @@ update_domain_attr_tree(struct sched_domain_attr *dattr, struct cpuset *c)
  *     element of the partition (one sched domain) to be passed to
  *     partition_sched_domains().
  */
-static int generate_sched_domains(cpumask_t **domains,
+/* FIXME: see the FIXME in partition_sched_domains() */
+static int generate_sched_domains(struct cpumask **domains,
                        struct sched_domain_attr **attributes)
 {
        LIST_HEAD(q);           /* queue of cpusets to be scanned */
@@ -618,10 +620,10 @@ static int generate_sched_domains(cpumask_t **domains,
        struct cpuset **csa;    /* array of all cpuset ptrs */
        int csn;                /* how many cpuset ptrs in csa so far */
        int i, j, k;            /* indices for partition finding loops */
-       cpumask_t *doms;        /* resulting partition; i.e. sched domains */
+       struct cpumask *doms;   /* resulting partition; i.e. sched domains */
        struct sched_domain_attr *dattr;  /* attributes for custom domains */
        int ndoms = 0;          /* number of sched domains in result */
-       int nslot;              /* next empty doms[] cpumask_t slot */
+       int nslot;              /* next empty doms[] struct cpumask slot */
 
        doms = NULL;
        dattr = NULL;
@@ -629,7 +631,7 @@ static int generate_sched_domains(cpumask_t **domains,
 
        /* Special case for the 99% of systems with one, full, sched domain */
        if (is_sched_load_balance(&top_cpuset)) {
-               doms = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
+               doms = kmalloc(cpumask_size(), GFP_KERNEL);
                if (!doms)
                        goto done;
 
@@ -708,7 +710,7 @@ restart:
         * Now we know how many domains to create.
         * Convert <csn, csa> to <ndoms, doms> and populate cpu masks.
         */
-       doms = kmalloc(ndoms * sizeof(cpumask_t), GFP_KERNEL);
+       doms = kmalloc(ndoms * cpumask_size(), GFP_KERNEL);
        if (!doms)
                goto done;
 
@@ -720,7 +722,7 @@ restart:
 
        for (nslot = 0, i = 0; i < csn; i++) {
                struct cpuset *a = csa[i];
-               cpumask_t *dp;
+               struct cpumask *dp;
                int apn = a->pn;
 
                if (apn < 0) {
@@ -743,7 +745,7 @@ restart:
                        continue;
                }
 
-               cpus_clear(*dp);
+               cpumask_clear(dp);
                if (dattr)
                        *(dattr + nslot) = SD_ATTR_INIT;
                for (j = i; j < csn; j++) {
@@ -790,7 +792,7 @@ done:
 static void do_rebuild_sched_domains(struct work_struct *unused)
 {
        struct sched_domain_attr *attr;
-       cpumask_t *doms;
+       struct cpumask *doms;
        int ndoms;
 
        get_online_cpus();
@@ -2044,7 +2046,7 @@ static int cpuset_track_online_cpus(struct notifier_block *unused_nb,
                                unsigned long phase, void *unused_cpu)
 {
        struct sched_domain_attr *attr;
-       cpumask_t *doms;
+       struct cpumask *doms;
        int ndoms;
 
        switch (phase) {
@@ -2114,7 +2116,7 @@ void __init cpuset_init_smp(void)
 /**
  * cpuset_cpus_allowed - return cpus_allowed mask from a tasks cpuset.
  * @tsk: pointer to task_struct from which to obtain cpuset->cpus_allowed.
- * @pmask: pointer to cpumask_t variable to receive cpus_allowed set.
+ * @pmask: pointer to struct cpumask variable to receive cpus_allowed set.
  *
  * Description: Returns the cpumask_var_t cpus_allowed of the cpuset
  * attached to the specified @tsk.  Guaranteed to return some non-empty
@@ -2122,7 +2124,7 @@ void __init cpuset_init_smp(void)
  * tasks cpuset.
  **/
 
-void cpuset_cpus_allowed(struct task_struct *tsk, cpumask_t *pmask)
+void cpuset_cpus_allowed(struct task_struct *tsk, struct cpumask *pmask)
 {
        mutex_lock(&callback_mutex);
        cpuset_cpus_allowed_locked(tsk, pmask);
@@ -2133,7 +2135,7 @@ void cpuset_cpus_allowed(struct task_struct *tsk, cpumask_t *pmask)
  * cpuset_cpus_allowed_locked - return cpus_allowed mask from a tasks cpuset.
  * Must be called with callback_mutex held.
  **/
-void cpuset_cpus_allowed_locked(struct task_struct *tsk, cpumask_t *pmask)
+void cpuset_cpus_allowed_locked(struct task_struct *tsk, struct cpumask *pmask)
 {
        task_lock(tsk);
        guarantee_online_cpus(task_cs(tsk), pmask);