Merge branch 'iommufd/arm-smmuv3-nested' of iommu/linux into iommufd for-next

Common SMMUv3 patches for the following patches adding nesting, shared
branch with the iommu tree.

* 'iommufd/arm-smmuv3-nested' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/iommu/linux:
  iommu/arm-smmu-v3: Expose the arm_smmu_attach interface
  iommu/arm-smmu-v3: Implement IOMMU_HWPT_ALLOC_NEST_PARENT
  iommu/arm-smmu-v3: Support IOMMU_GET_HW_INFO via struct arm_smmu_hw_info
  iommu/arm-smmu-v3: Report IOMMU_CAP_ENFORCE_CACHE_COHERENCY for CANWBS
  ACPI/IORT: Support CANWBS memory access flag
  ACPICA: IORT: Update for revision E.f
  vfio: Remove VFIO_TYPE1_NESTING_IOMMU
  ...

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

6 files changed, 16 insertions, 9 deletions

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 3ca89e0279a7..87b49ecc7b1e 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1586,7 +1586,7 @@ int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm,
 	int ret = -ENOMEM;
 
 	pmd = pmdp_get_lockless(src_pmd);
-	if (unlikely(pmd_special(pmd))) {
+	if (unlikely(pmd_present(pmd) && pmd_special(pmd))) {
 		dst_ptl = pmd_lock(dst_mm, dst_pmd);
 		src_ptl = pmd_lockptr(src_mm, src_pmd);
 		spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING);
diff --git a/mm/secretmem.c b/mm/secretmem.c
index 3afb5ad701e1..399552814fd0 100644
--- a/mm/secretmem.c
+++ b/mm/secretmem.c
@@ -238,7 +238,7 @@ SYSCALL_DEFINE1(memfd_secret, unsigned int, flags)
 	/* make sure local flags do not confict with global fcntl.h */
 	BUILD_BUG_ON(SECRETMEM_FLAGS_MASK & O_CLOEXEC);
 
-	if (!secretmem_enable)
+	if (!secretmem_enable || !can_set_direct_map())
 		return -ENOSYS;
 
 	if (flags & ~(SECRETMEM_FLAGS_MASK | O_CLOEXEC))
@@ -280,7 +280,7 @@ static struct file_system_type secretmem_fs = {
 
 static int __init secretmem_init(void)
 {
-	if (!secretmem_enable)
+	if (!secretmem_enable || !can_set_direct_map())
 		return 0;
 
 	secretmem_mnt = kern_mount(&secretmem_fs);
diff --git a/mm/slab.h b/mm/slab.h
index f22fb760b286..6c6fe6d630ce 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -310,7 +310,7 @@ struct kmem_cache {
 };
 
 #if defined(CONFIG_SYSFS) && !defined(CONFIG_SLUB_TINY)
-#define SLAB_SUPPORTS_SYSFS
+#define SLAB_SUPPORTS_SYSFS 1
 void sysfs_slab_unlink(struct kmem_cache *s);
 void sysfs_slab_release(struct kmem_cache *s);
 #else
@@ -546,6 +546,12 @@ static inline bool kmem_cache_debug_flags(struct kmem_cache *s, slab_flags_t fla
 	return false;
 }
 
+#if IS_ENABLED(CONFIG_SLUB_DEBUG) && IS_ENABLED(CONFIG_KUNIT)
+bool slab_in_kunit_test(void);
+#else
+static inline bool slab_in_kunit_test(void) { return false; }
+#endif
+
 #ifdef CONFIG_SLAB_OBJ_EXT
 
 /*
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 744324465615..3d26c257ed8b 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -508,8 +508,9 @@ void kmem_cache_destroy(struct kmem_cache *s)
 	kasan_cache_shutdown(s);
 
 	err = __kmem_cache_shutdown(s);
-	WARN(err, "%s %s: Slab cache still has objects when called from %pS",
-	     __func__, s->name, (void *)_RET_IP_);
+	if (!slab_in_kunit_test())
+		WARN(err, "%s %s: Slab cache still has objects when called from %pS",
+		     __func__, s->name, (void *)_RET_IP_);
 
 	list_del(&s->list);
 
diff --git a/mm/slub.c b/mm/slub.c
index 21f71cb6cc06..5b832512044e 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -827,7 +827,7 @@ static bool slab_add_kunit_errors(void)
 	return true;
 }
 
-static bool slab_in_kunit_test(void)
+bool slab_in_kunit_test(void)
 {
 	struct kunit_resource *resource;
 
@@ -843,7 +843,6 @@ static bool slab_in_kunit_test(void)
 }
 #else
 static inline bool slab_add_kunit_errors(void) { return false; }
-static inline bool slab_in_kunit_test(void) { return false; }
 #endif
 
 static inline unsigned int size_from_object(struct kmem_cache *s)
@@ -5436,6 +5435,8 @@ static void list_slab_objects(struct kmem_cache *s, struct slab *slab,
 	for_each_object(p, s, addr, slab->objects) {
 
 		if (!test_bit(__obj_to_index(s, addr, p), object_map)) {
+			if (slab_add_kunit_errors())
+				continue;
 			pr_err("Object 0x%p @offset=%tu\n", p, p - addr);
 			print_tracking(s, p);
 		}
diff --git a/mm/zswap.c b/mm/zswap.c
index 449914ea9919..162013952074 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -190,7 +190,6 @@ static struct shrinker *zswap_shrinker;
  *              section for context.
  * pool - the zswap_pool the entry's data is in
  * handle - zpool allocation handle that stores the compressed page data
- * value - value of the same-value filled pages which have same content
  * objcg - the obj_cgroup that the compressed memory is charged to
  * lru - handle to the pool's lru used to evict pages.
  */