slab: Get rid of obj_size macro

The size of the slab object is frequently needed. Since we now
have a size field directly in the kmem_cache structure there is no
need anymore of the obj_size macro/function.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/mm/slab.c b/mm/slab.c
index e2b3907..fc4a774 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -433,11 +433,6 @@ static int obj_offset(struct kmem_cache *cachep)
        return cachep->obj_offset;
 }
 
-static int obj_size(struct kmem_cache *cachep)
-{
-       return cachep->object_size;
-}
-
 static unsigned long long *dbg_redzone1(struct kmem_cache *cachep, void *objp)
 {
        BUG_ON(!(cachep->flags & SLAB_RED_ZONE));
@@ -465,7 +460,6 @@ static void **dbg_userword(struct kmem_cache *cachep, void *objp)
 #else
 
 #define obj_offset(x)                  0
-#define obj_size(cachep)               (cachep->size)
 #define dbg_redzone1(cachep, objp)     ({BUG(); (unsigned long long *)NULL;})
 #define dbg_redzone2(cachep, objp)     ({BUG(); (unsigned long long *)NULL;})
 #define dbg_userword(cachep, objp)     ({BUG(); (void **)NULL;})
@@ -1853,7 +1847,7 @@ static void kmem_rcu_free(struct rcu_head *head)
 static void store_stackinfo(struct kmem_cache *cachep, unsigned long *addr,
                            unsigned long caller)
 {
-       int size = obj_size(cachep);
+       int size = cachep->object_size;
 
        addr = (unsigned long *)&((char *)addr)[obj_offset(cachep)];
 
@@ -1885,7 +1879,7 @@ static void store_stackinfo(struct kmem_cache *cachep, unsigned long *addr,
 
 static void poison_obj(struct kmem_cache *cachep, void *addr, unsigned char val)
 {
-       int size = obj_size(cachep);
+       int size = cachep->object_size;
        addr = &((char *)addr)[obj_offset(cachep)];
 
        memset(addr, val, size);
@@ -1945,7 +1939,7 @@ static void print_objinfo(struct kmem_cache *cachep, void *objp, int lines)
                printk("\n");
        }
        realobj = (char *)objp + obj_offset(cachep);
-       size = obj_size(cachep);
+       size = cachep->object_size;
        for (i = 0; i < size && lines; i += 16, lines--) {
                int limit;
                limit = 16;
@@ -1962,7 +1956,7 @@ static void check_poison_obj(struct kmem_cache *cachep, void *objp)
        int lines = 0;
 
        realobj = (char *)objp + obj_offset(cachep);
-       size = obj_size(cachep);
+       size = cachep->object_size;
 
        for (i = 0; i < size; i++) {
                char exp = POISON_FREE;
@@ -3265,7 +3259,7 @@ static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
        if (cachep == &cache_cache)
                return false;
 
-       return should_failslab(obj_size(cachep), flags, cachep->flags);
+       return should_failslab(cachep->object_size, flags, cachep->flags);
 }
 
 static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
@@ -3525,14 +3519,14 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
   out:
        local_irq_restore(save_flags);
        ptr = cache_alloc_debugcheck_after(cachep, flags, ptr, caller);
-       kmemleak_alloc_recursive(ptr, obj_size(cachep), 1, cachep->flags,
+       kmemleak_alloc_recursive(ptr, cachep->object_size, 1, cachep->flags,
                                 flags);
 
        if (likely(ptr))
-               kmemcheck_slab_alloc(cachep, flags, ptr, obj_size(cachep));
+               kmemcheck_slab_alloc(cachep, flags, ptr, cachep->object_size);
 
        if (unlikely((flags & __GFP_ZERO) && ptr))
-               memset(ptr, 0, obj_size(cachep));
+               memset(ptr, 0, cachep->object_size);
 
        return ptr;
 }
@@ -3587,15 +3581,15 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
        objp = __do_cache_alloc(cachep, flags);
        local_irq_restore(save_flags);
        objp = cache_alloc_debugcheck_after(cachep, flags, objp, caller);
-       kmemleak_alloc_recursive(objp, obj_size(cachep), 1, cachep->flags,
+       kmemleak_alloc_recursive(objp, cachep->object_size, 1, cachep->flags,
                                 flags);
        prefetchw(objp);
 
        if (likely(objp))
-               kmemcheck_slab_alloc(cachep, flags, objp, obj_size(cachep));
+               kmemcheck_slab_alloc(cachep, flags, objp, cachep->object_size);
 
        if (unlikely((flags & __GFP_ZERO) && objp))
-               memset(objp, 0, obj_size(cachep));
+               memset(objp, 0, cachep->object_size);
 
        return objp;
 }
@@ -3711,7 +3705,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp,
        kmemleak_free_recursive(objp, cachep->flags);
        objp = cache_free_debugcheck(cachep, objp, caller);
 
-       kmemcheck_slab_free(cachep, objp, obj_size(cachep));
+       kmemcheck_slab_free(cachep, objp, cachep->object_size);
 
        /*
         * Skip calling cache_free_alien() when the platform is not numa.
@@ -3746,7 +3740,7 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
        void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0));
 
        trace_kmem_cache_alloc(_RET_IP_, ret,
-                              obj_size(cachep), cachep->size, flags);
+                              cachep->object_size, cachep->size, flags);
 
        return ret;
 }
@@ -3774,7 +3768,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
                                       __builtin_return_address(0));
 
        trace_kmem_cache_alloc_node(_RET_IP_, ret,
-                                   obj_size(cachep), cachep->size,
+                                   cachep->object_size, cachep->size,
                                    flags, nodeid);
 
        return ret;
@@ -3896,9 +3890,9 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
        unsigned long flags;
 
        local_irq_save(flags);
-       debug_check_no_locks_freed(objp, obj_size(cachep));
+       debug_check_no_locks_freed(objp, cachep->size);
        if (!(cachep->flags & SLAB_DEBUG_OBJECTS))
-               debug_check_no_obj_freed(objp, obj_size(cachep));
+               debug_check_no_obj_freed(objp, cachep->object_size);
        __cache_free(cachep, objp, __builtin_return_address(0));
        local_irq_restore(flags);
 
@@ -3927,8 +3921,9 @@ void kfree(const void *objp)
        local_irq_save(flags);
        kfree_debugcheck(objp);
        c = virt_to_cache(objp);
-       debug_check_no_locks_freed(objp, obj_size(c));
-       debug_check_no_obj_freed(objp, obj_size(c));
+       debug_check_no_locks_freed(objp, c->object_size);
+
+       debug_check_no_obj_freed(objp, c->object_size);
        __cache_free(c, (void *)objp, __builtin_return_address(0));
        local_irq_restore(flags);
 }
@@ -3936,7 +3931,7 @@ EXPORT_SYMBOL(kfree);
 
 unsigned int kmem_cache_size(struct kmem_cache *cachep)
 {
-       return obj_size(cachep);
+       return cachep->object_size;
 }
 EXPORT_SYMBOL(kmem_cache_size);
 
@@ -4657,6 +4652,6 @@ size_t ksize(const void *objp)
        if (unlikely(objp == ZERO_SIZE_PTR))
                return 0;
 
-       return obj_size(virt_to_cache(objp));
+       return virt_to_cache(objp)->object_size;
 }
 EXPORT_SYMBOL(ksize);