Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

[sfrench/cifs-2.6.git] / mm / kmemcheck.c

diff --git a/mm/kmemcheck.c b/mm/kmemcheck.c
index 800d64b854ea6695eccf83dee42502bfca74cf45..cec5940325151e407aa90128a35cb683afd436d7 100644 (file)
--- a/mm/kmemcheck.c
+++ b/mm/kmemcheck.c
@@ -1,126 +1 @@
 // SPDX-License-Identifier: GPL-2.0
-#include <linux/gfp.h>
-#include <linux/mm_types.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include "slab.h"
-#include <linux/kmemcheck.h>
-
-void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
-{
-       struct page *shadow;
-       int pages;
-       int i;
-
-       pages = 1 << order;
-
-       /*
-        * With kmemcheck enabled, we need to allocate a memory area for the
-        * shadow bits as well.
-        */
-       shadow = alloc_pages_node(node, flags | __GFP_NOTRACK, order);
-       if (!shadow) {
-               if (printk_ratelimit())
-                       pr_err("kmemcheck: failed to allocate shadow bitmap\n");
-               return;
-       }
-
-       for(i = 0; i < pages; ++i)
-               page[i].shadow = page_address(&shadow[i]);
-
-       /*
-        * Mark it as non-present for the MMU so that our accesses to
-        * this memory will trigger a page fault and let us analyze
-        * the memory accesses.
-        */
-       kmemcheck_hide_pages(page, pages);
-}
-
-void kmemcheck_free_shadow(struct page *page, int order)
-{
-       struct page *shadow;
-       int pages;
-       int i;
-
-       if (!kmemcheck_page_is_tracked(page))
-               return;
-
-       pages = 1 << order;
-
-       kmemcheck_show_pages(page, pages);
-
-       shadow = virt_to_page(page[0].shadow);
-
-       for(i = 0; i < pages; ++i)
-               page[i].shadow = NULL;
-
-       __free_pages(shadow, order);
-}
-
-void kmemcheck_slab_alloc(struct kmem_cache *s, gfp_t gfpflags, void *object,
-                         size_t size)
-{
-       if (unlikely(!object)) /* Skip object if allocation failed */
-               return;
-
-       /*
-        * Has already been memset(), which initializes the shadow for us
-        * as well.
-        */
-       if (gfpflags & __GFP_ZERO)
-               return;
-
-       /* No need to initialize the shadow of a non-tracked slab. */
-       if (s->flags & SLAB_NOTRACK)
-               return;
-
-       if (!kmemcheck_enabled || gfpflags & __GFP_NOTRACK) {
-               /*
-                * Allow notracked objects to be allocated from
-                * tracked caches. Note however that these objects
-                * will still get page faults on access, they just
-                * won't ever be flagged as uninitialized. If page
-                * faults are not acceptable, the slab cache itself
-                * should be marked NOTRACK.
-                */
-               kmemcheck_mark_initialized(object, size);
-       } else if (!s->ctor) {
-               /*
-                * New objects should be marked uninitialized before
-                * they're returned to the called.
-                */
-               kmemcheck_mark_uninitialized(object, size);
-       }
-}
-
-void kmemcheck_slab_free(struct kmem_cache *s, void *object, size_t size)
-{
-       /* TODO: RCU freeing is unsupported for now; hide false positives. */
-       if (!s->ctor && !(s->flags & SLAB_TYPESAFE_BY_RCU))
-               kmemcheck_mark_freed(object, size);
-}
-
-void kmemcheck_pagealloc_alloc(struct page *page, unsigned int order,
-                              gfp_t gfpflags)
-{
-       int pages;
-
-       if (gfpflags & (__GFP_HIGHMEM | __GFP_NOTRACK))
-               return;
-
-       pages = 1 << order;
-
-       /*
-        * NOTE: We choose to track GFP_ZERO pages too; in fact, they
-        * can become uninitialized by copying uninitialized memory
-        * into them.
-        */
-
-       /* XXX: Can use zone->node for node? */
-       kmemcheck_alloc_shadow(page, order, gfpflags, -1);
-
-       if (gfpflags & __GFP_ZERO)
-               kmemcheck_mark_initialized_pages(page, pages);
-       else
-               kmemcheck_mark_uninitialized_pages(page, pages);
-}