[XFS] Cleanup the use of zones/slabs, more consistent and allows flags to

be passed.

SGI-PV: 949073
SGI-Modid: xfs-linux-melb:xfs-kern:25122a

Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 55 insertions, 36 deletions

diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index c64a29cdfff3..f0268a84e6fd 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -23,17 +23,8 @@
 #include <linux/mm.h>
 
 /*
- * memory management routines
+ * Process flags handling
  */
-#define KM_SLEEP        0x0001u
-#define KM_NOSLEEP      0x0002u
-#define KM_NOFS         0x0004u
-#define KM_MAYFAIL      0x0008u
-
-#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)
@@ -67,74 +58,102 @@ typedef unsigned long xfs_pflags_t;
         *(NSTATEP) = *(OSTATEP);        \
 } while (0)
 
-static __inline gfp_t kmem_flags_convert(unsigned int __nocast flags)
+/*
+ * General memory allocation interfaces
+ */
+
+#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)
 {
-        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));
 
         if (flags & KM_NOSLEEP) {
-                lflags |= GFP_ATOMIC;
+                lflags = GFP_ATOMIC | __GFP_NOWARN;
         } else {
-                lflags |= GFP_KERNEL;
-
-                /* avoid recusive callbacks to filesystem during transactions */
+                lflags = GFP_KERNEL | __GFP_NOWARN;
                 if (PFLAGS_TEST_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_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  0
+
+#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();
 }
 
-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);