slab allocators: Remove SLAB_CTOR_ATOMIC

[firefly-linux-kernel-4.4.55.git] / mm / slab.c

diff --git a/mm/slab.c b/mm/slab.c
index 2a3cbd6e675d113ac45cd44b147275f0ea543da6..52ecf7599a7b7a8d22e12cb8ad1eef98122cb935 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -116,8 +116,7 @@
 #include       <asm/page.h>
 
 /*
- * DEBUG       - 1 for kmem_cache_create() to honour; SLAB_DEBUG_INITIAL,
- *               SLAB_RED_ZONE & SLAB_POISON.
+ * DEBUG       - 1 for kmem_cache_create() to honour; SLAB_RED_ZONE & SLAB_POISON.
  *               0 for faster, smaller code (especially in the critical paths).
  *
  * STATS       - 1 to collect stats for /proc/slabinfo.
@@ -172,7 +171,7 @@
 
 /* Legal flag mask for kmem_cache_create(). */
 #if DEBUG
-# define CREATE_MASK   (SLAB_DEBUG_INITIAL | SLAB_RED_ZONE | \
+# define CREATE_MASK   (SLAB_RED_ZONE | \
                         SLAB_POISON | SLAB_HWCACHE_ALIGN | \
                         SLAB_CACHE_DMA | \
                         SLAB_STORE_USER | \
@@ -2184,12 +2183,6 @@ kmem_cache_create (const char *name, size_t size, size_t align,
 
 #if DEBUG
        WARN_ON(strchr(name, ' '));     /* It confuses parsers */
-       if ((flags & SLAB_DEBUG_INITIAL) && !ctor) {
-               /* No constructor, but inital state check requested */
-               printk(KERN_ERR "%s: No con, but init state check "
-                      "requested - %s\n", __FUNCTION__, name);
-               flags &= ~SLAB_DEBUG_INITIAL;
-       }
 #if FORCED_DEBUG
        /*
         * Enable redzoning and last user accounting, except for caches with
@@ -2759,13 +2752,6 @@ static int cache_grow(struct kmem_cache *cachep,
 
        ctor_flags = SLAB_CTOR_CONSTRUCTOR;
        local_flags = (flags & GFP_LEVEL_MASK);
-       if (!(local_flags & __GFP_WAIT))
-               /*
-                * Not allowed to sleep.  Need to tell a constructor about
-                * this - it might need to know...
-                */
-               ctor_flags |= SLAB_CTOR_ATOMIC;
-
        /* Take the l3 list lock to change the colour_next on this node */
        check_irq_off();
        l3 = cachep->nodelists[nodeid];
@@ -2895,15 +2881,6 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
        BUG_ON(objnr >= cachep->num);
        BUG_ON(objp != index_to_obj(cachep, slabp, objnr));
 
-       if (cachep->flags & SLAB_DEBUG_INITIAL) {
-               /*
-                * Need to call the slab's constructor so the caller can
-                * perform a verify of its state (debugging).  Called without
-                * the cache-lock held.
-                */
-               cachep->ctor(objp + obj_offset(cachep),
-                            cachep, SLAB_CTOR_CONSTRUCTOR | SLAB_CTOR_VERIFY);
-       }
        if (cachep->flags & SLAB_POISON && cachep->dtor) {
                /* we want to cache poison the object,
                 * call the destruction callback
@@ -3108,14 +3085,8 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
        }
 #endif
        objp += obj_offset(cachep);
-       if (cachep->ctor && cachep->flags & SLAB_POISON) {
-               unsigned long ctor_flags = SLAB_CTOR_CONSTRUCTOR;
-
-               if (!(flags & __GFP_WAIT))
-                       ctor_flags |= SLAB_CTOR_ATOMIC;
-
-               cachep->ctor(objp, cachep, ctor_flags);
-       }
+       if (cachep->ctor && cachep->flags & SLAB_POISON)
+               cachep->ctor(objp, cachep, SLAB_CTOR_CONSTRUCTOR);
 #if ARCH_SLAB_MINALIGN
        if ((u32)objp & (ARCH_SLAB_MINALIGN-1)) {
                printk(KERN_ERR "0x%p: not aligned to ARCH_SLAB_MINALIGN=%d\n",