#ifdef HAVE_MM_INLINE
# include <linux/mm_inline.h>
#endif
-
-/*
- * Shrinker
- */
-#ifdef HAVE_SHRINK_CONTROL
-# define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
- struct shrinker *shrinker, \
- struct shrink_control *sc
-# define shrink_param(sc, var) ((sc)->var)
-#else
-struct shrink_control {
- gfp_t gfp_mask;
- unsigned long nr_to_scan;
-};
-# ifdef HAVE_SHRINKER_WANT_SHRINK_PTR
-# define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
- struct shrinker *shrinker, \
- int nr_to_scan, gfp_t gfp_mask
-# else
-# define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
- int nr_to_scan, gfp_t gfp_mask
-# endif
- /* avoid conflict with spl mm_compat.h */
-# define HAVE_SHRINK_CONTROL_STRUCT 1
-# define shrink_param(sc, var) (var)
+#include <linux/sched.h>
+#ifdef HAVE_SCHED_HEADERS
+#include <linux/sched/mm.h>
#endif
-#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 }
+#ifdef HAVE_TOTALRAM_PAGES_AS_FUNC
+ #ifndef cfs_totalram_pages
+ #define cfs_totalram_pages() totalram_pages()
+ #endif
#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 }
-# define SHRINK_STOP (~0UL)
+ #ifndef cfs_totalram_pages
+ #define cfs_totalram_pages() totalram_pages
+ #endif
#endif
-static inline
-struct shrinker *set_shrinker(int seek, struct shrinker_var *var)
+#ifndef HAVE_MEMALLOC_RECLAIM
+static inline unsigned int memalloc_noreclaim_save(void)
{
- struct shrinker *s;
+ unsigned int flags = current->flags & PF_MEMALLOC;
- s = kzalloc(sizeof(*s), GFP_KERNEL);
- if (s == NULL)
- return (NULL);
+ current->flags |= PF_MEMALLOC;
+ return flags;
+}
-#ifdef HAVE_SHRINKER_COUNT
- s->count_objects = var->count;
- s->scan_objects = var->scan;
-#else
- s->shrink = var->shrink;
+static inline void memalloc_noreclaim_restore(unsigned int flags)
+{
+ current->flags = (current->flags & ~PF_MEMALLOC) | flags;
+}
+#endif /* !HAVE_MEMALLOC_RECLAIM */
+
+#ifndef HAVE_BITMAP_ALLOC
+static inline unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags)
+{
+ return kmalloc_array(BITS_TO_LONGS(nbits), sizeof(unsigned long),
+ flags);
+}
+
+static inline unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags)
+{
+ return bitmap_alloc(nbits, flags | __GFP_ZERO);
+}
+
+static inline void bitmap_free(const unsigned long *bitmap)
+{
+ kfree(bitmap);
+}
+#endif /* !HAVE_BITMAP_ALLOC */
+
+/*
+ * Shrinker
+ */
+#ifndef SHRINK_STOP
+# define SHRINK_STOP (~0UL)
#endif
- s->seeks = seek;
- register_shrinker(s);
+#ifndef HAVE_MMAP_LOCK
+static inline void mmap_write_lock(struct mm_struct *mm)
+{
+ down_write(&mm->mmap_sem);
+}
- return s;
+static inline bool mmap_write_trylock(struct mm_struct *mm)
+{
+ return down_write_trylock(&mm->mmap_sem) != 0;
}
-static inline
-void remove_shrinker(struct shrinker *shrinker)
+static inline void mmap_write_unlock(struct mm_struct *mm)
{
- if (shrinker == NULL)
- return;
+ up_write(&mm->mmap_sem);
+}
- unregister_shrinker(shrinker);
- kfree(shrinker);
+static inline void mmap_read_lock(struct mm_struct *mm)
+{
+ down_read(&mm->mmap_sem);
}
+static inline bool mmap_read_trylock(struct mm_struct *mm)
+{
+ return down_read_trylock(&mm->mmap_sem) != 0;
+}
+
+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__ */