[patch -mm] fix SLOB on x64

[Ingo Molnar <mingo@elte.hu>]

this patch fixes 32-bitness bugs in mm/slob.c. Successfully booted x64 
with SLOB enabled. (i have switched the PREEMPT_RT feature to use the 
SLOB allocator exclusively, so it must work on all platforms)

Signed-off-by: Ingo Molnar <mingo@elte.hu>

Index: linux/mm/slob.c
===================================================================
--- linux.orig/mm/slob.c
+++ linux/mm/slob.c
@@ -198,7 +198,7 @@ void kfree(const void *block)
 	if (!block)
 		return;
 
-	if (!((unsigned int)block & (PAGE_SIZE-1))) {
+	if (!((unsigned long)block & (PAGE_SIZE-1))) {
 		/* might be on the big block list */
 		spin_lock_irqsave(&block_lock, flags);
 		for (bb = bigblocks; bb; last = &bb->next, bb = bb->next) {
@@ -227,7 +227,7 @@ unsigned int ksize(const void *block)
 	if (!block)
 		return 0;
 
-	if (!((unsigned int)block & (PAGE_SIZE-1))) {
+	if (!((unsigned long)block & (PAGE_SIZE-1))) {
 		spin_lock_irqsave(&block_lock, flags);
 		for (bb = bigblocks; bb; bb = bb->next)
 			if (bb->pages == block) {
@@ -326,7 +326,7 @@ void kmem_cache_init(void)
 	void *p = slob_alloc(PAGE_SIZE, 0, PAGE_SIZE-1);
 
 	if (p)
-		free_page((unsigned int)p);
+		free_page((unsigned long)p);
 
 	mod_timer(&slob_timer, jiffies + HZ);
 }