Index: linux-2.4.24/include/linux/dynlocks.h
===================================================================
--- linux-2.4.24.orig/include/linux/dynlocks.h 2003-01-30 13:24:37.000000000 +0300
-+++ linux-2.4.24/include/linux/dynlocks.h 2004-07-16 10:25:15.000000000 +0400
-@@ -0,0 +1,45 @@
++++ linux-2.4.24/include/linux/dynlocks.h 2004-07-18 11:09:33.000000000 +0400
+@@ -0,0 +1,43 @@
+#ifndef _LINUX_DYNLOCKS_H
+#define _LINUX_DYNLOCKS_H
+
+ int dl_writers;
+ int dl_pid; /* holder of the lock */
+ wait_queue_head_t dl_wait;
-+ struct dynlock *dl_head;
+};
+
+/*
+ unsigned dl_magic;
+ struct list_head dl_list;
+ spinlock_t dl_list_lock;
-+ struct dynlock * dl_back;
+};
+
+void dynlock_init(struct dynlock *dl);
Index: linux-2.4.24/lib/dynlocks.c
===================================================================
--- linux-2.4.24.orig/lib/dynlocks.c 2003-01-30 13:24:37.000000000 +0300
-+++ linux-2.4.24/lib/dynlocks.c 2004-07-16 11:53:38.000000000 +0400
-@@ -0,0 +1,199 @@
++++ linux-2.4.24/lib/dynlocks.c 2004-07-18 11:23:01.000000000 +0400
+@@ -0,0 +1,187 @@
+/*
+ * Dynamic Locks
+ *
+#include <linux/slab.h>
+#include <linux/sched.h>
+
++static kmem_cache_t * dynlock_cachep = NULL;
++
++void __init dynlock_cache_init(void)
++{
++ printk(KERN_INFO "init dynlocks cache\n");
++ dynlock_cachep = kmem_cache_create("dynlock_cache",
++ sizeof(struct dynlock_member),
++ 0,
++ SLAB_HWCACHE_ALIGN,
++ NULL, NULL);
++ if (dynlock_cachep == NULL)
++ panic("Can't create dynlock cache");
++}
++
+/*
+ * dynlock_init
+ *
+ spin_lock_init(&dl->dl_list_lock);
+ INIT_LIST_HEAD(&dl->dl_list);
+ dl->dl_magic = DYNLOCK_LIST_MAGIC;
-+ dl->dl_back = dl;
+}
+
+/*
+ int num = 0;
+
+ BUG_ON(dl == NULL);
-+ if (dl->dl_magic != DYNLOCK_LIST_MAGIC) {
-+ printk("corrupted dynlock head 0x%p: magic 0x%x (!=0x%x)\n",
-+ dl, dl->dl_magic, DYNLOCK_LIST_MAGIC);
-+ BUG();
-+ }
-+ BUG_ON(dl->dl_back != dl);
++ BUG_ON(dl->dl_magic != DYNLOCK_LIST_MAGIC);
+repeat:
+ /* find requested lock in lockspace */
+ spin_lock(&dl->dl_list_lock);
+ BUG_ON(cur->next == NULL);
+ BUG_ON(cur->prev == NULL);
+ hl = list_entry(cur, struct dynlock_member, dl_list);
-+ if (hl->dl_magic != DYNLOCK_MAGIC || hl->dl_head != dl) {
-+ printk("corrupted lock 0x%p/%d: magic 0x%x (!=0x%x)\n",
-+ hl, num, hl->dl_magic, DYNLOCK_MAGIC);
-+ printk(" value 0x%lx, %d readers, %d writers, pid %d, %d refs\n",
-+ hl->dl_value, hl->dl_readers, hl->dl_writers,
-+ hl->dl_pid, hl->dl_refcount);
-+ printk(" head 0x%p\n", hl->dl_head);
-+ BUG();
-+ }
++ BUG_ON(hl->dl_magic != DYNLOCK_MAGIC);
+ if (hl->dl_value == value) {
+ /* lock is found */
+ if (nhl) {
+ * lock we didn't find and just created
+ * so, we drop our lock
+ */
-+ kfree(nhl);
++ kmem_cache_free(dynlock_cachep, nhl);
+ nhl = NULL;
+ }
+ hl->dl_refcount++;
+ spin_unlock(&dl->dl_list_lock);
+
+ /* lock not found and we haven't allocated lock yet. allocate it */
-+ nhl = kmalloc(sizeof(struct dynlock_member), gfp);
++ nhl = kmem_cache_alloc(dynlock_cachep, gfp);
+ if (nhl == NULL)
+ return NULL;
+ nhl->dl_refcount = 1;
+ nhl->dl_readers = 0;
+ nhl->dl_writers = 0;
+ nhl->dl_magic = DYNLOCK_MAGIC;
-+ nhl->dl_head = dl;
+ init_waitqueue_head(&nhl->dl_wait);
+
+ /* while lock is being allocated, someone else may allocate it
+ hl->dl_pid = current->pid;
+ spin_unlock(&dl->dl_list_lock);
+
-+ BUG_ON(hl->dl_magic != DYNLOCK_MAGIC);
+ return hl;
+}
+
+ BUG_ON(dl == NULL);
+ BUG_ON(hl == NULL);
+ BUG_ON(dl->dl_magic != DYNLOCK_LIST_MAGIC);
-+ BUG_ON(dl->dl_back != dl);
-+ if (hl->dl_magic != DYNLOCK_MAGIC || hl->dl_head != dl) {
-+ printk("corrupted lock 0x%p: magic 0x%x (!=0x%x)\n",
-+ hl, hl->dl_magic, DYNLOCK_MAGIC);
-+ printk(" value 0x%lx, %d readers, %d writers, pid %d, %d refs\n",
-+ hl->dl_value, hl->dl_readers, hl->dl_writers,
-+ hl->dl_pid, hl->dl_refcount);
-+ printk(" head 0x%p\n", hl->dl_head);
-+ BUG();
-+ }
++ BUG_ON(hl->dl_magic != DYNLOCK_MAGIC);
+ BUG_ON(current->pid != hl->dl_pid);
+
+ spin_lock(&dl->dl_list_lock);
+ if (--(hl->dl_refcount) == 0) {
+ hl->dl_magic = DYNLOCK_MAGIC2;
+ list_del(&hl->dl_list);
++ kmem_cache_free(dynlock_cachep, hl);
+ }
+ spin_unlock(&dl->dl_list_lock);
-+ if (hl->dl_refcount == 0)
-+ kfree(hl);
+}
+
+EXPORT_SYMBOL(dynlock_init);
Index: linux-2.4.24/lib/Makefile
===================================================================
--- linux-2.4.24.orig/lib/Makefile 2004-06-24 09:06:32.000000000 +0400
-+++ linux-2.4.24/lib/Makefile 2004-07-14 18:14:28.000000000 +0400
++++ linux-2.4.24/lib/Makefile 2004-07-16 15:54:06.000000000 +0400
@@ -9,10 +9,10 @@
L_TARGET := lib.a
obj-$(CONFIG_FW_LOADER) += firmware_class.o
obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
+Index: linux-2.4.24/fs/dcache.c
+===================================================================
+--- linux-2.4.24.orig/fs/dcache.c 2004-07-16 12:35:54.000000000 +0400
++++ linux-2.4.24/fs/dcache.c 2004-07-16 15:54:06.000000000 +0400
+@@ -1274,6 +1274,7 @@
+ extern void bdev_cache_init(void);
+ extern void cdev_cache_init(void);
+ extern void iobuf_cache_init(void);
++extern void dynlock_cache_init(void);
+
+ void __init vfs_caches_init(unsigned long mempages)
+ {
+@@ -1310,4 +1311,5 @@
+ bdev_cache_init();
+ cdev_cache_init();
+ iobuf_cache_init();
++ dynlock_cache_init();
+ }
git://git.whamcloud.com / fs / lustre-release.git / blobdiff