LU-9859 libcfs: move tgt_descs to standard Linux bitmaps.

[fs/lustre-release.git] / libcfs / include / libcfs / linux / linux-mem.h

diff --git a/libcfs/include/libcfs/linux/linux-mem.h b/libcfs/include/libcfs/linux/linux-mem.h
index b822173..80668b1 100644 (file)
--- a/libcfs/include/libcfs/linux/linux-mem.h
+++ b/libcfs/include/libcfs/linux/linux-mem.h
@@ -44,6 +44,53 @@
 #ifdef HAVE_MM_INLINE
 # include <linux/mm_inline.h>
 #endif
+#include <linux/sched.h>
+#ifdef HAVE_SCHED_HEADERS
+#include <linux/sched/mm.h>
+#endif
+
+#ifdef HAVE_TOTALRAM_PAGES_AS_FUNC
+ #ifndef cfs_totalram_pages
+  #define cfs_totalram_pages() totalram_pages()
+ #endif
+#else
+ #ifndef cfs_totalram_pages
+  #define cfs_totalram_pages() totalram_pages
+ #endif
+#endif
+
+#ifndef HAVE_MEMALLOC_RECLAIM
+static inline unsigned int memalloc_noreclaim_save(void)
+{
+       unsigned int flags = current->flags & PF_MEMALLOC;
+
+       current->flags |= PF_MEMALLOC;
+       return flags;
+}
+
+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