*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Intel Corporation.
+ * Copyright (c) 2011, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef __LIBCFS_LINUX_CFS_MEM_H__
#define __LIBCFS_LINUX_CFS_MEM_H__
-#ifndef __LIBCFS_LIBCFS_H__
-#error Do not #include this file directly. #include <libcfs/libcfs.h> instead
-#endif
-
-#ifndef __KERNEL__
-#error This include is only for kernel use.
-#endif
-
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#ifdef HAVE_MM_INLINE
# include <linux/mm_inline.h>
#endif
+#include <linux/sched.h>
+#ifdef HAVE_SCHED_HEADERS
+#include <linux/sched/mm.h>
+#endif
-#define CFS_PAGE_MASK (~((__u64)PAGE_CACHE_SIZE-1))
-
-#define page_index(p) ((p)->index)
-
-
-#define memory_pressure_get() (current->flags & PF_MEMALLOC)
-#define memory_pressure_set() do { current->flags |= PF_MEMALLOC; } while (0)
-#define memory_pressure_clr() do { current->flags &= ~PF_MEMALLOC; } while (0)
-
-#if BITS_PER_LONG == 32
-/* limit to lowmem on 32-bit systems */
-#define NUM_CACHEPAGES \
- min(num_physpages, 1UL << (30 - PAGE_CACHE_SHIFT) * 3 / 4)
+#ifdef HAVE_TOTALRAM_PAGES_AS_FUNC
+ #ifndef cfs_totalram_pages
+ #define cfs_totalram_pages() totalram_pages()
+ #endif
#else
-#define NUM_CACHEPAGES num_physpages
+ #ifndef cfs_totalram_pages
+ #define cfs_totalram_pages() totalram_pages
+ #endif
#endif
-/*
- * In Linux there is no way to determine whether current execution context is
- * blockable.
- */
-#define ALLOC_ATOMIC_TRY GFP_ATOMIC
-/* GFP_IOFS was added in 2.6.33 kernel */
-#ifndef GFP_IOFS
-#define GFP_IOFS (__GFP_IO | __GFP_FS)
-#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;
+}
-#define DECL_MMSPACE mm_segment_t __oldfs
-#define MMSPACE_OPEN \
- do { __oldfs = get_fs(); set_fs(get_ds());} while(0)
-#define MMSPACE_CLOSE set_fs(__oldfs)
+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);
+}
-extern void *cfs_cpt_malloc(struct cfs_cpt_table *cptab, int cpt,
- size_t nr_bytes, unsigned int flags);
-extern void *cfs_cpt_vmalloc(struct cfs_cpt_table *cptab, int cpt,
- size_t nr_bytes);
-extern struct page *cfs_page_cpt_alloc(struct cfs_cpt_table *cptab,
- int cpt, unsigned int flags);
-extern void *cfs_mem_cache_cpt_alloc(struct kmem_cache *cachep,
- struct cfs_cpt_table *cptab,
- int cpt, unsigned int flags);
+static inline void bitmap_free(const unsigned long *bitmap)
+{
+ kfree(bitmap);
+}
+#endif /* !HAVE_BITMAP_ALLOC */
/*
* 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
-# 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
-# define shrink_param(sc, var) (var)
+#ifndef SHRINK_STOP
+# define SHRINK_STOP (~0UL)
#endif
-#ifdef HAVE_REGISTER_SHRINKER
-typedef int (*shrinker_t)(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask));
-
-static inline
-struct shrinker *set_shrinker(int seek, shrinker_t func)
+#ifndef HAVE_MMAP_LOCK
+static inline void mmap_write_lock(struct mm_struct *mm)
{
- struct shrinker *s;
-
- s = kmalloc(sizeof(*s), GFP_KERNEL);
- if (s == NULL)
- return (NULL);
+ down_write(&mm->mmap_sem);
+}
- s->shrink = func;
- 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__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff