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diff --git a/sys/compat/linuxkpi/common/include/linux/shrinker.h b/sys/compat/linuxkpi/common/include/linux/shrinker.h
--- a/sys/compat/linuxkpi/common/include/linux/shrinker.h
+++ b/sys/compat/linuxkpi/common/include/linux/shrinker.h
@@ -27,6 +27,8 @@
#define _LINUXKPI_LINUX_SHRINKER_H_
#include <sys/queue.h>
+
+#include <linux/bitops.h>
#include <linux/gfp.h>
struct shrink_control {
@@ -39,6 +41,7 @@
unsigned long (*count_objects)(struct shrinker *, struct shrink_control *);
unsigned long (*scan_objects)(struct shrinker *, struct shrink_control *);
int seeks;
+ unsigned int flags;
void * private_data;
long batch;
TAILQ_ENTRY(shrinker) next;
@@ -48,10 +51,23 @@
#define DEFAULT_SEEKS 2
+#define SHRINKER_REGISTERED BIT(0)
+#define SHRINKER_ALLOCATED BIT(1)
+
+struct shrinker * linuxkpi_shrinker_alloc(
+ unsigned int flags, const char *fmt, ...);
int linuxkpi_register_shrinker(struct shrinker *s);
void linuxkpi_unregister_shrinker(struct shrinker *s);
+void linuxkpi_shrinker_free(struct shrinker *shrinker);
void linuxkpi_synchronize_shrinkers(void);
+#define shrinker_alloc(flags, fmt, ...) \
+ linuxkpi_shrinker_alloc(flags, fmt __VA_OPT__(,) __VA_ARGS__)
+#define shrinker_register(shrinker) \
+ linuxkpi_register_shrinker(shrinker)
+#define shrinker_free(shrinker) \
+ linuxkpi_shrinker_free(shrinker)
+
#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60000
#define register_shrinker(s, ...) linuxkpi_register_shrinker(s)
#else
diff --git a/sys/compat/linuxkpi/common/src/linux_shrinker.c b/sys/compat/linuxkpi/common/src/linux_shrinker.c
--- a/sys/compat/linuxkpi/common/src/linux_shrinker.c
+++ b/sys/compat/linuxkpi/common/src/linux_shrinker.c
@@ -32,10 +32,26 @@
#include <linux/compat.h>
#include <linux/shrinker.h>
+#include <linux/slab.h>
TAILQ_HEAD(, shrinker) lkpi_shrinkers = TAILQ_HEAD_INITIALIZER(lkpi_shrinkers);
static struct sx sx_shrinker;
+struct shrinker *
+linuxkpi_shrinker_alloc(unsigned int flags, const char *fmt, ...)
+{
+ struct shrinker *shrinker;
+
+ shrinker = kzalloc(sizeof(*shrinker), GFP_KERNEL);
+ if (shrinker == NULL)
+ return (NULL);
+
+ shrinker->flags = flags | SHRINKER_ALLOCATED;
+ shrinker->seeks = DEFAULT_SEEKS;
+
+ return (shrinker);
+}
+
int
linuxkpi_register_shrinker(struct shrinker *s)
{
@@ -44,6 +60,7 @@
KASSERT(s->count_objects != NULL, ("NULL shrinker"));
KASSERT(s->scan_objects != NULL, ("NULL shrinker"));
sx_xlock(&sx_shrinker);
+ s->flags |= SHRINKER_REGISTERED;
TAILQ_INSERT_TAIL(&lkpi_shrinkers, s, next);
sx_xunlock(&sx_shrinker);
return (0);
@@ -55,9 +72,20 @@
sx_xlock(&sx_shrinker);
TAILQ_REMOVE(&lkpi_shrinkers, s, next);
+ s->flags &= ~SHRINKER_REGISTERED;
sx_xunlock(&sx_shrinker);
}
+void
+linuxkpi_shrinker_free(struct shrinker *shrinker)
+{
+
+ if (shrinker->flags & SHRINKER_REGISTERED)
+ unregister_shrinker(shrinker);
+
+ kfree(shrinker);
+}
+
void
linuxkpi_synchronize_shrinkers(void)
{

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