*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
#ifndef __LIBCFS_PRIM_H__
#define __LIBCFS_PRIM_H__
-#ifndef CFS_EXPORT_SYMBOL
-# define CFS_EXPORT_SYMBOL(s)
-#endif
+#include <linux/mm.h>
+#include <linux/sched.h>
/*
- * Schedule
+ * Memory
*/
-void cfs_schedule_timeout_and_set_state(cfs_task_state_t state,
- int64_t timeout);
-void cfs_schedule_timeout(int64_t timeout);
-void cfs_schedule(void);
-void cfs_pause(cfs_duration_t ticks);
-int cfs_need_resched(void);
-void cfs_cond_resched(void);
+#if BITS_PER_LONG == 32
+/* limit to lowmem on 32-bit systems */
+# define NUM_CACHEPAGES \
+ min(cfs_totalram_pages(), 1UL << (30 - PAGE_SHIFT) * 3 / 4)
+#else
+# define NUM_CACHEPAGES cfs_totalram_pages()
+#endif
-/*
- * Wait Queues
- */
-void cfs_waitq_init(cfs_waitq_t *waitq);
-void cfs_waitlink_init(cfs_waitlink_t *link);
-void cfs_waitq_add(cfs_waitq_t *waitq, cfs_waitlink_t *link);
-void cfs_waitq_add_exclusive(cfs_waitq_t *waitq,
- cfs_waitlink_t *link);
-void cfs_waitq_add_exclusive_head(cfs_waitq_t *waitq,
- cfs_waitlink_t *link);
-void cfs_waitq_del(cfs_waitq_t *waitq, cfs_waitlink_t *link);
-int cfs_waitq_active(cfs_waitq_t *waitq);
-void cfs_waitq_signal(cfs_waitq_t *waitq);
-void cfs_waitq_signal_nr(cfs_waitq_t *waitq, int nr);
-void cfs_waitq_broadcast(cfs_waitq_t *waitq);
-void cfs_waitq_wait(cfs_waitlink_t *link, cfs_task_state_t state);
-int64_t cfs_waitq_timedwait(cfs_waitlink_t *link, cfs_task_state_t state,
- int64_t timeout);
+static inline unsigned int memory_pressure_get(void)
+{
+ return current->flags & PF_MEMALLOC;
+}
-/*
- * Timer
- */
-typedef void (cfs_timer_func_t)(ulong_ptr_t);
+static inline void memory_pressure_set(void)
+{
+ current->flags |= PF_MEMALLOC;
+}
-void cfs_init_timer(cfs_timer_t *t);
-void cfs_timer_init(cfs_timer_t *t, cfs_timer_func_t *func, void *arg);
-void cfs_timer_done(cfs_timer_t *t);
-void cfs_timer_arm(cfs_timer_t *t, cfs_time_t deadline);
-void cfs_timer_disarm(cfs_timer_t *t);
-int cfs_timer_is_armed(cfs_timer_t *t);
-cfs_time_t cfs_timer_deadline(cfs_timer_t *t);
+static inline void memory_pressure_clr(void)
+{
+ current->flags &= ~PF_MEMALLOC;
+}
-/*
- * Memory
- */
static inline int cfs_memory_pressure_get_and_set(void)
{
int old = memory_pressure_get();
memory_pressure_set();
else
memory_pressure_clr();
- return;
}
#endif