/*
* Shrinker
*/
-# define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
- struct shrinker *shrinker, \
- struct shrink_control *sc
-# define shrink_param(sc, var) ((sc)->var)
-
-#ifdef HAVE_SHRINKER_COUNT
-struct shrinker_var {
- unsigned long (*count)(struct shrinker *,
- struct shrink_control *sc);
- unsigned long (*scan)(struct shrinker *,
- struct shrink_control *sc);
-};
-# define DEF_SHRINKER_VAR(name, shrink, count_obj, scan_obj) \
- struct shrinker_var name = { .count = count_obj, .scan = scan_obj }
-#else
-struct shrinker_var {
- int (*shrink)(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask));
-};
-# define DEF_SHRINKER_VAR(name, shrinker, count, scan) \
- struct shrinker_var name = { .shrink = shrinker }
+#ifndef SHRINK_STOP
# define SHRINK_STOP (~0UL)
#endif
-static inline
-struct shrinker *set_shrinker(int seek, struct shrinker_var *var)
+#ifndef HAVE_MMAP_LOCK
+static inline void mmap_write_lock(struct mm_struct *mm)
{
- struct shrinker *s;
-
- s = kzalloc(sizeof(*s), GFP_KERNEL);
- if (s == NULL)
- return (NULL);
+ down_write(&mm->mmap_sem);
+}
-#ifdef HAVE_SHRINKER_COUNT
- s->count_objects = var->count;
- s->scan_objects = var->scan;
-#else
- s->shrink = var->shrink;
-#endif
- s->seeks = seek;
+static inline bool mmap_write_trylock(struct mm_struct *mm)
+{
+ return down_write_trylock(&mm->mmap_sem) != 0;
+}
- register_shrinker(s);
+static inline void mmap_write_unlock(struct mm_struct *mm)
+{
+ up_write(&mm->mmap_sem);
+}
- return s;
+static inline void mmap_read_lock(struct mm_struct *mm)
+{
+ down_read(&mm->mmap_sem);
}
-static inline
-void remove_shrinker(struct shrinker *shrinker)
+static inline bool mmap_read_trylock(struct mm_struct *mm)
{
- if (shrinker == NULL)
- return;
+ return down_read_trylock(&mm->mmap_sem) != 0;
+}
- unregister_shrinker(shrinker);
- kfree(shrinker);
+static inline void mmap_read_unlock(struct mm_struct *mm)
+{
+ up_read(&mm->mmap_sem);
}
+#endif
+
+#ifdef HAVE_VMALLOC_2ARGS
+#define __ll_vmalloc(size, flags) __vmalloc(size, flags)
+#else
+#define __ll_vmalloc(size, flags) __vmalloc(size, flags, PAGE_KERNEL)
+#endif
#endif /* __LINUX_CFS_MEM_H__ */