linux 2.6.16.38 w/ vs2.0.3-rc1

[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 939bd84..c64a29c 100644 (file)
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -23,101 +23,118 @@
 #include <linux/mm.h>
 
 /*
- * General memory allocation interfaces
+ * memory management routines
  */
-
 #define KM_SLEEP       0x0001u
 #define KM_NOSLEEP     0x0002u
 #define KM_NOFS                0x0004u
 #define KM_MAYFAIL     0x0008u
 
-/*
- * 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)
+#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)
 {
-       gfp_t   lflags;
+       gfp_t   lflags = __GFP_NOWARN;  /* we'll report problems, if need be */
 
-       BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL));
+#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
 
        if (flags & KM_NOSLEEP) {
-               lflags = GFP_ATOMIC | __GFP_NOWARN;
+               lflags |= GFP_ATOMIC;
        } else {
-               lflags = GFP_KERNEL | __GFP_NOWARN;
-               if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
+               lflags |= GFP_KERNEL;
+
+               /* avoid recusive callbacks to filesystem during transactions */
+               if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS))
                        lflags &= ~__GFP_FS;
        }
-       return lflags;
-}
 
-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);
-
-/*
- * 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
+        return lflags;
+}
 
-static inline kmem_zone_t *
+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 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
+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();
 }
 
-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_zone_alloc(kmem_zone_t *, unsigned int __nocast);
 
-/*
- * Low memory cache shrinkers
- */
+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);
 
 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);