[PATCH] Extract the allocpercpu functions from the slab allocator

The allocpercpu functions __alloc_percpu and __free_percpu() are heavily
using the slab allocator.  However, they are conceptually slab.  This also
simplifies SLOB (at this point slob may be broken in mm.  This should fix
it).

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 45 deletions

diff --git a/mm/slob.c b/mm/slob.c
index 7b52b20..4c28a42 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -343,48 +343,3 @@ void kmem_cache_init(void)
 atomic_t slab_reclaim_pages = ATOMIC_INIT(0);
 EXPORT_SYMBOL(slab_reclaim_pages);
 
-#ifdef CONFIG_SMP
-
-void *__alloc_percpu(size_t size)
-{
-	int i;
-	struct percpu_data *pdata = kmalloc(sizeof (*pdata), GFP_KERNEL);
-
-	if (!pdata)
-		return NULL;
-
-	for_each_possible_cpu(i) {
-		pdata->ptrs[i] = kmalloc(size, GFP_KERNEL);
-		if (!pdata->ptrs[i])
-			goto unwind_oom;
-		memset(pdata->ptrs[i], 0, size);
-	}
-
-	/* Catch derefs w/o wrappers */
-	return (void *) (~(unsigned long) pdata);
-
-unwind_oom:
-	while (--i >= 0) {
-		if (!cpu_possible(i))
-			continue;
-		kfree(pdata->ptrs[i]);
-	}
-	kfree(pdata);
-	return NULL;
-}
-EXPORT_SYMBOL(__alloc_percpu);
-
-void
-free_percpu(const void *objp)
-{
-	int i;
-	struct percpu_data *p = (struct percpu_data *) (~(unsigned long) objp);
-
-	for_each_possible_cpu(i)
-		kfree(p->ptrs[i]);
-
-	kfree(p);
-}
-EXPORT_SYMBOL(free_percpu);
-
-#endif