X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fslab.c;h=c9e706db46340f81f723e899d45510cdfe78d50c;hb=242e54686257493f0b10ac557e730419d9af7d24;hp=ec660d85ddd769c1f94b3385ca571ebb8b316005;hpb=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2;p=linux-2.6

diff --git a/mm/slab.c b/mm/slab.c
index ec660d85dd..c9e706db46 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -92,6 +92,7 @@
 #include	<linux/sysctl.h>
 #include	<linux/module.h>
 #include	<linux/rcupdate.h>
+#include	<linux/string.h>
 
 #include	<asm/uaccess.h>
 #include	<asm/cacheflush.h>
@@ -583,7 +584,8 @@ static inline struct array_cache *ac_data(kmem_cache_t *cachep)
 	return cachep->array[smp_processor_id()];
 }
 
-static inline kmem_cache_t *kmem_find_general_cachep(size_t size, int gfpflags)
+static inline kmem_cache_t *__find_general_cachep(size_t size,
+						unsigned int __nocast gfpflags)
 {
 	struct cache_sizes *csizep = malloc_sizes;
 
@@ -607,6 +609,13 @@ static inline kmem_cache_t *kmem_find_general_cachep(size_t size, int gfpflags)
 	return csizep->cs_cachep;
 }
 
+kmem_cache_t *kmem_find_general_cachep(size_t size,
+		unsigned int __nocast gfpflags)
+{
+	return __find_general_cachep(size, gfpflags);
+}
+EXPORT_SYMBOL(kmem_find_general_cachep);
+
 /* Cal the num objs, wastage, and bytes left over for a given slab size. */
 static void cache_estimate(unsigned long gfporder, size_t size, size_t align,
 		 int flags, size_t *left_over, unsigned int *num)
@@ -672,14 +681,11 @@ static struct array_cache *alloc_arraycache(int cpu, int entries,
 	int memsize = sizeof(void*)*entries+sizeof(struct array_cache);
 	struct array_cache *nc = NULL;
 
-	if (cpu != -1) {
-		kmem_cache_t *cachep;
-		cachep = kmem_find_general_cachep(memsize, GFP_KERNEL);
-		if (cachep)
-			nc = kmem_cache_alloc_node(cachep, cpu_to_node(cpu));
-	}
-	if (!nc)
+	if (cpu == -1)
 		nc = kmalloc(memsize, GFP_KERNEL);
+	else
+		nc = kmalloc_node(memsize, GFP_KERNEL, cpu_to_node(cpu));
+
 	if (nc) {
 		nc->avail = 0;
 		nc->limit = entries;
@@ -1663,7 +1669,7 @@ int kmem_cache_destroy(kmem_cache_t * cachep)
 	}
 
 	if (unlikely(cachep->flags & SLAB_DESTROY_BY_RCU))
-		synchronize_kernel();
+		synchronize_rcu();
 
 	/* no cpu_online check required here since we clear the percpu
 	 * array on cpu offline and set this to NULL.
@@ -2096,7 +2102,7 @@ cache_alloc_debugcheck_before(kmem_cache_t *cachep, unsigned int __nocast flags)
 #if DEBUG
 static void *
 cache_alloc_debugcheck_after(kmem_cache_t *cachep,
-			unsigned long flags, void *objp, void *caller)
+			unsigned int __nocast flags, void *objp, void *caller)
 {
 	if (!objp)	
 		return objp;
@@ -2361,13 +2367,16 @@ out:
  * and can sleep. And it will allocate memory on the given node, which
  * can improve the performance for cpu bound structures.
  */
-void *kmem_cache_alloc_node(kmem_cache_t *cachep, int nodeid)
+void *kmem_cache_alloc_node(kmem_cache_t *cachep, int flags, int nodeid)
 {
 	int loop;
 	void *objp;
 	struct slab *slabp;
 	kmem_bufctl_t next;
 
+	if (nodeid == -1)
+		return kmem_cache_alloc(cachep, flags);
+
 	for (loop = 0;;loop++) {
 		struct list_head *q;
 
@@ -2393,7 +2402,7 @@ void *kmem_cache_alloc_node(kmem_cache_t *cachep, int nodeid)
 		spin_unlock_irq(&cachep->spinlock);
 
 		local_irq_disable();
-		if (!cache_grow(cachep, GFP_KERNEL, nodeid)) {
+		if (!cache_grow(cachep, flags, nodeid)) {
 			local_irq_enable();
 			return NULL;
 		}
@@ -2435,6 +2444,16 @@ got_slabp:
 }
 EXPORT_SYMBOL(kmem_cache_alloc_node);
 
+void *kmalloc_node(size_t size, unsigned int __nocast flags, int node)
+{
+	kmem_cache_t *cachep;
+
+	cachep = kmem_find_general_cachep(size, flags);
+	if (unlikely(cachep == NULL))
+		return NULL;
+	return kmem_cache_alloc_node(cachep, flags, node);
+}
+EXPORT_SYMBOL(kmalloc_node);
 #endif
 
 /**
@@ -2462,7 +2481,12 @@ void *__kmalloc(size_t size, unsigned int __nocast flags)
 {
 	kmem_cache_t *cachep;
 
-	cachep = kmem_find_general_cachep(size, flags);
+	/* If you want to save a few bytes .text space: replace
+	 * __ with kmem_.
+	 * Then kmalloc uses the uninlined functions instead of the inline
+	 * functions.
+	 */
+	cachep = __find_general_cachep(size, flags);
 	if (unlikely(cachep == NULL))
 		return NULL;
 	return __cache_alloc(cachep, flags);
@@ -2489,9 +2513,8 @@ void *__alloc_percpu(size_t size, size_t align)
 	for (i = 0; i < NR_CPUS; i++) {
 		if (!cpu_possible(i))
 			continue;
-		pdata->ptrs[i] = kmem_cache_alloc_node(
-				kmem_find_general_cachep(size, GFP_KERNEL),
-				cpu_to_node(i));
+		pdata->ptrs[i] = kmalloc_node(size, GFP_KERNEL,
+						cpu_to_node(i));
 
 		if (!pdata->ptrs[i])
 			goto unwind_oom;
@@ -2603,6 +2626,12 @@ unsigned int kmem_cache_size(kmem_cache_t *cachep)
 }
 EXPORT_SYMBOL(kmem_cache_size);
 
+const char *kmem_cache_name(kmem_cache_t *cachep)
+{
+	return cachep->name;
+}
+EXPORT_SYMBOL_GPL(kmem_cache_name);
+
 struct ccupdate_struct {
 	kmem_cache_t *cachep;
 	struct array_cache *new[NR_CPUS];
@@ -2828,6 +2857,7 @@ next:
 	}
 	check_irq_on();
 	up(&cache_chain_sem);
+	drain_remote_pages();
 	/* Setup the next iteration */
 	schedule_delayed_work(&__get_cpu_var(reap_work), REAPTIMEOUT_CPUC + smp_processor_id());
 }
@@ -3058,3 +3088,26 @@ unsigned int ksize(const void *objp)
 
 	return size;
 }
+
+
+/*
+ * kstrdup - allocate space for and copy an existing string
+ *
+ * @s: the string to duplicate
+ * @gfp: the GFP mask used in the kmalloc() call when allocating memory
+ */
+char *kstrdup(const char *s, unsigned int __nocast gfp)
+{
+	size_t len;
+	char *buf;
+
+	if (!s)
+		return NULL;
+
+	len = strlen(s) + 1;
+	buf = kmalloc(len, gfp);
+	if (buf)
+		memcpy(buf, s, len);
+	return buf;
+}
+EXPORT_SYMBOL(kstrdup);