slub: Remove useless checks in alloc_debug_processing

[linux-2.6-omap-h63xx.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index e01d399894c43935a7460cf56ef69b89922b637b..0a5a1001590ba67b610cc755cfdda08e3cbf6572 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -852,7 +852,7 @@ static int alloc_debug_processing(struct kmem_cache *s, struct page *page,
        if (!check_slab(s, page))
                goto bad;
 
-       if (object && !on_freelist(s, page, object)) {
+       if (!on_freelist(s, page, object)) {
                object_err(s, page, object, "Object already allocated");
                goto bad;
        }
@@ -862,7 +862,7 @@ static int alloc_debug_processing(struct kmem_cache *s, struct page *page,
                goto bad;
        }
 
-       if (object && !check_object(s, page, object, 0))
+       if (!check_object(s, page, object, 0))
                goto bad;
 
        /* Success perform special debug activities for allocs */
@@ -997,30 +997,11 @@ static unsigned long kmem_cache_flags(unsigned long objsize,
        void (*ctor)(struct kmem_cache *, void *))
 {
        /*
-        * The page->offset field is only 16 bit wide. This is an offset
-        * in units of words from the beginning of an object. If the slab
-        * size is bigger then we cannot move the free pointer behind the
-        * object anymore.
-        *
-        * On 32 bit platforms the limit is 256k. On 64bit platforms
-        * the limit is 512k.
-        *
-        * Debugging or ctor may create a need to move the free
-        * pointer. Fail if this happens.
+        * Enable debugging if selected on the kernel commandline.
         */
-       if (objsize >= 65535 * sizeof(void *)) {
-               BUG_ON(flags & (SLAB_RED_ZONE | SLAB_POISON |
-                               SLAB_STORE_USER | SLAB_DESTROY_BY_RCU));
-               BUG_ON(ctor);
-       } else {
-               /*
-                * Enable debugging if selected on the kernel commandline.
-                */
-               if (slub_debug && (!slub_debug_slabs ||
-                   strncmp(slub_debug_slabs, name,
-                       strlen(slub_debug_slabs)) == 0))
-                               flags |= slub_debug;
-       }
+       if (slub_debug && (!slub_debug_slabs ||
+           strncmp(slub_debug_slabs, name, strlen(slub_debug_slabs)) == 0))
+                       flags |= slub_debug;
 
        return flags;
 }