fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / fs / xfs / linux-2.6 / kmem.h

diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index c64a29c..9ebabdf 100644 (file)
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -23,118 +23,103 @@
 #include <linux/mm.h>
 
 /*
- * memory management routines
+ * General memory allocation interfaces
  */
+
 #define KM_SLEEP       0x0001u
 #define KM_NOSLEEP     0x0002u
 #define KM_NOFS                0x0004u
 #define KM_MAYFAIL     0x0008u
+#define KM_LARGE       0x0010u
 
-#define        kmem_zone       kmem_cache
-#define kmem_zone_t    struct kmem_cache
-
-typedef unsigned long xfs_pflags_t;
-
-#define PFLAGS_TEST_NOIO()              (current->flags & PF_NOIO)
-#define PFLAGS_TEST_FSTRANS()           (current->flags & PF_FSTRANS)
-
-#define PFLAGS_SET_NOIO() do {         \
-       current->flags |= PF_NOIO;      \
-} while (0)
-
-#define PFLAGS_CLEAR_NOIO() do {       \
-       current->flags &= ~PF_NOIO;     \
-} while (0)
-
-/* these could be nested, so we save state */
-#define PFLAGS_SET_FSTRANS(STATEP) do {        \
-       *(STATEP) = current->flags;     \
-       current->flags |= PF_FSTRANS;   \
-} while (0)
-
-#define PFLAGS_CLEAR_FSTRANS(STATEP) do { \
-       *(STATEP) = current->flags;     \
-       current->flags &= ~PF_FSTRANS;  \
-} while (0)
-
-/* Restore the PF_FSTRANS state to what was saved in STATEP */
-#define PFLAGS_RESTORE_FSTRANS(STATEP) do {                    \
-       current->flags = ((current->flags & ~PF_FSTRANS) |      \
-                         (*(STATEP) & PF_FSTRANS));            \
-} while (0)
-
-#define PFLAGS_DUP(OSTATEP, NSTATEP) do { \
-       *(NSTATEP) = *(OSTATEP);        \
-} while (0)
-
-static __inline gfp_t kmem_flags_convert(unsigned int __nocast flags)
+/*
+ * We use a special process flag to avoid recursive callbacks into
+ * the filesystem during transactions.  We will also issue our own
+ * warnings, so we explicitly skip any generic ones (silly of us).
+ */
+static inline gfp_t
+kmem_flags_convert(unsigned int __nocast flags)
 {
-       gfp_t   lflags = __GFP_NOWARN;  /* we'll report problems, if need be */
+       gfp_t   lflags;
 
-#ifdef DEBUG
-       if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL))) {
-               printk(KERN_WARNING
-                   "XFS: memory allocation with wrong flags (%x)\n", flags);
-               BUG();
-       }
-#endif
+       BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_LARGE));
 
        if (flags & KM_NOSLEEP) {
-               lflags |= GFP_ATOMIC;
+               lflags = GFP_ATOMIC | __GFP_NOWARN;
        } else {
-               lflags |= GFP_KERNEL;
-
-               /* avoid recusive callbacks to filesystem during transactions */
-               if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS))
+               lflags = GFP_KERNEL | __GFP_NOWARN;
+               if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
                        lflags &= ~__GFP_FS;
        }
-
-        return lflags;
+       return lflags;
 }
 
-static __inline kmem_zone_t *
+extern void *kmem_alloc(size_t, unsigned int __nocast);
+extern void *kmem_zalloc(size_t, unsigned int __nocast);
+extern void *kmem_zalloc_greedy(size_t *, size_t, size_t, unsigned int __nocast);
+extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
+extern void  kmem_free(void *, size_t);
+
+/*
+ * Zone interfaces
+ */
+
+#define KM_ZONE_HWALIGN        SLAB_HWCACHE_ALIGN
+#define KM_ZONE_RECLAIM        SLAB_RECLAIM_ACCOUNT
+#define KM_ZONE_SPREAD SLAB_MEM_SPREAD
+
+#define kmem_zone      kmem_cache
+#define kmem_zone_t    struct kmem_cache
+
+static inline kmem_zone_t *
 kmem_zone_init(int size, char *zone_name)
 {
        return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL);
 }
 
-static __inline void
+static inline kmem_zone_t *
+kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
+                    void (*construct)(void *, kmem_zone_t *, unsigned long))
+{
+       return kmem_cache_create(zone_name, size, 0, flags, construct, NULL);
+}
+
+static inline void
 kmem_zone_free(kmem_zone_t *zone, void *ptr)
 {
        kmem_cache_free(zone, ptr);
 }
 
-static __inline void
+static inline void
 kmem_zone_destroy(kmem_zone_t *zone)
 {
-       if (zone && kmem_cache_destroy(zone))
-               BUG();
+       if (zone)
+               kmem_cache_destroy(zone);
 }
 
-extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
 extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast);
+extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
 
-extern void *kmem_alloc(size_t, unsigned int __nocast);
-extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
-extern void *kmem_zalloc(size_t, unsigned int __nocast);
-extern void  kmem_free(void *, size_t);
+/*
+ * Low memory cache shrinkers
+ */
 
 typedef struct shrinker *kmem_shaker_t;
 typedef int (*kmem_shake_func_t)(int, gfp_t);
 
-static __inline kmem_shaker_t
+static inline kmem_shaker_t
 kmem_shake_register(kmem_shake_func_t sfunc)
 {
        return set_shrinker(DEFAULT_SEEKS, sfunc);
 }
 
-static __inline void
+static inline void
 kmem_shake_deregister(kmem_shaker_t shrinker)
 {
        remove_shrinker(shrinker);
 }
 
-static __inline int
+static inline int
 kmem_shake_allow(gfp_t gfp_mask)
 {
        return (gfp_mask & __GFP_WAIT);