X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=libcfs%2Finclude%2Flibcfs%2Flibcfs_prim.h;h=03da8fe39d72f49176ccaea176e690ecf9d6ce3a;hp=1bbf943a34f7864c41568a8c0d7430a2fb5368bf;hb=40e312a8275ed9240e63f0ac023d8b7a38136f42;hpb=0f8dca08a4f68cba82c2c822998ecc309d3b7aaf

diff --git a/libcfs/include/libcfs/libcfs_prim.h b/libcfs/include/libcfs/libcfs_prim.h
index 1bbf943..03da8fe 100644
--- a/libcfs/include/libcfs/libcfs_prim.h
+++ b/libcfs/include/libcfs/libcfs_prim.h
@@ -65,6 +65,8 @@ 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);
@@ -86,4 +88,35 @@ 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);
+
+/*
+ * Memory
+ */
+#ifndef cfs_memory_pressure_get
+#define cfs_memory_pressure_get() (0)
+#endif
+#ifndef cfs_memory_pressure_set
+#define cfs_memory_pressure_set() do {} while (0)
+#endif
+#ifndef cfs_memory_pressure_clr
+#define cfs_memory_pressure_clr() do {} while (0)
+#endif
+
+static inline int cfs_memory_pressure_get_and_set(void)
+{
+        int old = cfs_memory_pressure_get();
+
+        if (!old)
+                cfs_memory_pressure_set();
+        return old;
+}
+
+static inline void cfs_memory_pressure_restore(int old)
+{
+        if (old)
+                cfs_memory_pressure_set();
+        else
+                cfs_memory_pressure_clr();
+        return;
+}
 #endif