mm: Remove slab destructors from kmem_cache_create().

Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

kernel/fork.c

@@ -137,7 +137,7 @@ void __init fork_init(unsigned long mempages)
 	/* create a slab on which task_structs can be allocated */
 	task_struct_cachep =
 		kmem_cache_create("task_struct", sizeof(struct task_struct),
-			ARCH_MIN_TASKALIGN, SLAB_PANIC, NULL, NULL);
+			ARCH_MIN_TASKALIGN, SLAB_PANIC, NULL);
 #endif
 
 	/*
@@ -1446,22 +1446,22 @@ void __init proc_caches_init(void)
 	sighand_cachep = kmem_cache_create("sighand_cache",
 			sizeof(struct sighand_struct), 0,
 			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_DESTROY_BY_RCU,
-			sighand_ctor, NULL);
+			sighand_ctor);
 	signal_cachep = kmem_cache_create("signal_cache",
 			sizeof(struct signal_struct), 0,
-			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
-	files_cachep = kmem_cache_create("files_cache", 
+			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+	files_cachep = kmem_cache_create("files_cache",
 			sizeof(struct files_struct), 0,
-			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
-	fs_cachep = kmem_cache_create("fs_cache", 
+			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+	fs_cachep = kmem_cache_create("fs_cache",
 			sizeof(struct fs_struct), 0,
-			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
+			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 	vm_area_cachep = kmem_cache_create("vm_area_struct",
 			sizeof(struct vm_area_struct), 0,
-			SLAB_PANIC, NULL, NULL);
+			SLAB_PANIC, NULL);
 	mm_cachep = kmem_cache_create("mm_struct",
 			sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN,
-			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
+			SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 }
 
 /*

kernel/nsproxy.c

@@ -193,7 +193,7 @@ int unshare_nsproxy_namespaces(unsigned long unshare_flags,
 static int __init nsproxy_cache_init(void)
 {
 	nsproxy_cachep = kmem_cache_create("nsproxy", sizeof(struct nsproxy),
-					   0, SLAB_PANIC, NULL, NULL);
+					   0, SLAB_PANIC, NULL);
 	return 0;
 }
 

kernel/posix-timers.c

@@ -241,7 +241,7 @@ static __init int init_posix_timers(void)
 	register_posix_clock(CLOCK_MONOTONIC, &clock_monotonic);
 
 	posix_timers_cache = kmem_cache_create("posix_timers_cache",
-					sizeof (struct k_itimer), 0, 0, NULL, NULL);
+					sizeof (struct k_itimer), 0, 0, NULL);
 	idr_init(&posix_timers_id);
 	return 0;
 }

kernel/user.c

@@ -208,7 +208,7 @@ static int __init uid_cache_init(void)
 	int n;
 
 	uid_cachep = kmem_cache_create("uid_cache", sizeof(struct user_struct),
-			0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
+			0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
 
 	for(n = 0; n < UIDHASH_SZ; ++n)
 		INIT_LIST_HEAD(init_user_ns.uidhash_table + n);