[PATCH] Transform kmem_cache_alloc()+memset(0) -> kmem_cache_zalloc().

Replace appropriate pairs of "kmem_cache_alloc()" + "memset(0)" with the
corresponding "kmem_cache_zalloc()" call.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Roland McGrath <roland@redhat.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Greg KH <greg@kroah.com>
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Jan Kara <jack@ucw.cz>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: James Morris <jmorris@namei.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

39 files changed, 48 insertions, 103 deletions

diff --git a/arch/ia64/ia32/binfmt_elf32.c b/arch/ia64/ia32/binfmt_elf32.c
index 578737ec7629..c05bda662364 100644
--- a/arch/ia64/ia32/binfmt_elf32.c
+++ b/arch/ia64/ia32/binfmt_elf32.c
@@ -91,9 +91,8 @@ ia64_elf32_init (struct pt_regs *regs)
          * it with privilege level 3 because the IVE uses non-privileged accesses to these
          * tables.  IA-32 segmentation is used to protect against IA-32 accesses to them.
          */
-        vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (vma) {
-                memset(vma, 0, sizeof(*vma));
                 vma->vm_mm = current->mm;
                 vma->vm_start = IA32_GDT_OFFSET;
                 vma->vm_end = vma->vm_start + PAGE_SIZE;
@@ -117,9 +116,8 @@ ia64_elf32_init (struct pt_regs *regs)
          * code is locked in specific gate page, which is pointed by pretcode
          * when setup_frame_ia32
          */
-        vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (vma) {
-                memset(vma, 0, sizeof(*vma));
                 vma->vm_mm = current->mm;
                 vma->vm_start = IA32_GATE_OFFSET;
                 vma->vm_end = vma->vm_start + PAGE_SIZE;
@@ -142,9 +140,8 @@ ia64_elf32_init (struct pt_regs *regs)
          * Install LDT as anonymous memory.  This gives us all-zero segment descriptors
          * until a task modifies them via modify_ldt().
          */
-        vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (vma) {
-                memset(vma, 0, sizeof(*vma));
                 vma->vm_mm = current->mm;
                 vma->vm_start = IA32_LDT_OFFSET;
                 vma->vm_end = vma->vm_start + PAGE_ALIGN(IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE);
@@ -214,12 +211,10 @@ ia32_setup_arg_pages (struct linux_binprm *bprm, int executable_stack)
                 bprm->loader += stack_base;
         bprm->exec += stack_base;
 
-        mpnt = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        mpnt = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (!mpnt)
                 return -ENOMEM;
 
-        memset(mpnt, 0, sizeof(*mpnt));
-
         down_write(&current->mm->mmap_sem);
         {
                 mpnt->vm_mm = current->mm;
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index aa94f60fa8e7..86e144f321ff 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2301,12 +2301,11 @@ pfm_smpl_buffer_alloc(struct task_struct *task, pfm_context_t *ctx, unsigned lon
         DPRINT(("smpl_buf @%p\n", smpl_buf));
 
         /* allocate vma */
-        vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (!vma) {
                 DPRINT(("Cannot allocate vma\n"));
                 goto error_kmem;
         }
-        memset(vma, 0, sizeof(*vma));
 
         /*
          * partially initialize the vma for the sampling buffer
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 760dda4d5b6e..f225dd72968b 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -176,9 +176,8 @@ ia64_init_addr_space (void)
          * the problem.  When the process attempts to write to the register backing store
          * for the first time, it will get a SEGFAULT in this case.
          */
-        vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (vma) {
-                memset(vma, 0, sizeof(*vma));
                 vma->vm_mm = current->mm;
                 vma->vm_start = current->thread.rbs_bot & PAGE_MASK;
                 vma->vm_end = vma->vm_start + PAGE_SIZE;
@@ -195,9 +194,8 @@ ia64_init_addr_space (void)
 
         /* map NaT-page at address zero to speed up speculative dereferencing of NULL: */
         if (!(current->personality & MMAP_PAGE_ZERO)) {
-                vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+                vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
                 if (vma) {
-                        memset(vma, 0, sizeof(*vma));
                         vma->vm_mm = current->mm;
                         vma->vm_end = PAGE_SIZE;
                         vma->vm_page_prot = __pgprot(pgprot_val(PAGE_READONLY) | _PAGE_MA_NAT);
diff --git a/arch/x86_64/ia32/ia32_binfmt.c b/arch/x86_64/ia32/ia32_binfmt.c
index 5ce0bd486bbf..6efe04f3cbca 100644
--- a/arch/x86_64/ia32/ia32_binfmt.c
+++ b/arch/x86_64/ia32/ia32_binfmt.c
@@ -300,12 +300,10 @@ int ia32_setup_arg_pages(struct linux_binprm *bprm, unsigned long stack_top,
                 bprm->loader += stack_base;
         bprm->exec += stack_base;
 
-        mpnt = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        mpnt = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (!mpnt) 
                 return -ENOMEM; 
 
-        memset(mpnt, 0, sizeof(*mpnt));
-
         down_write(&mm->mmap_sem);
         {
                 mpnt->vm_mm = mm;
diff --git a/drivers/infiniband/hw/ehca/ehca_cq.c b/drivers/infiniband/hw/ehca/ehca_cq.c
index 9291a86ca053..6ebfa27e4e16 100644
--- a/drivers/infiniband/hw/ehca/ehca_cq.c
+++ b/drivers/infiniband/hw/ehca/ehca_cq.c
@@ -134,14 +134,13 @@ struct ib_cq *ehca_create_cq(struct ib_device *device, int cqe,
         if (cqe >= 0xFFFFFFFF - 64 - additional_cqe)
                 return ERR_PTR(-EINVAL);
 
-        my_cq = kmem_cache_alloc(cq_cache, GFP_KERNEL);
+        my_cq = kmem_cache_zalloc(cq_cache, GFP_KERNEL);
         if (!my_cq) {
                 ehca_err(device, "Out of memory for ehca_cq struct device=%p",
                          device);
                 return ERR_PTR(-ENOMEM);
         }
 
-        memset(my_cq, 0, sizeof(struct ehca_cq));
         memset(&param, 0, sizeof(struct ehca_alloc_cq_parms));
 
         spin_lock_init(&my_cq->spinlock);
diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c
index cfb362a1029c..d22ab563633f 100644
--- a/drivers/infiniband/hw/ehca/ehca_mrmw.c
+++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c
@@ -53,9 +53,8 @@ static struct ehca_mr *ehca_mr_new(void)
 {
         struct ehca_mr *me;
 
-        me = kmem_cache_alloc(mr_cache, GFP_KERNEL);
+        me = kmem_cache_zalloc(mr_cache, GFP_KERNEL);
         if (me) {
-                memset(me, 0, sizeof(struct ehca_mr));
                 spin_lock_init(&me->mrlock);
         } else
                 ehca_gen_err("alloc failed");
@@ -72,9 +71,8 @@ static struct ehca_mw *ehca_mw_new(void)
 {
         struct ehca_mw *me;
 
-        me = kmem_cache_alloc(mw_cache, GFP_KERNEL);
+        me = kmem_cache_zalloc(mw_cache, GFP_KERNEL);
         if (me) {
-                memset(me, 0, sizeof(struct ehca_mw));
                 spin_lock_init(&me->mwlock);
         } else
                 ehca_gen_err("alloc failed");
diff --git a/drivers/infiniband/hw/ehca/ehca_pd.c b/drivers/infiniband/hw/ehca/ehca_pd.c
index d5345e5b3cd6..79d0591a8043 100644
--- a/drivers/infiniband/hw/ehca/ehca_pd.c
+++ b/drivers/infiniband/hw/ehca/ehca_pd.c
@@ -50,14 +50,13 @@ struct ib_pd *ehca_alloc_pd(struct ib_device *device,
 {
         struct ehca_pd *pd;
 
-        pd = kmem_cache_alloc(pd_cache, GFP_KERNEL);
+        pd = kmem_cache_zalloc(pd_cache, GFP_KERNEL);
         if (!pd) {
                 ehca_err(device, "device=%p context=%p out of memory",
                          device, context);
                 return ERR_PTR(-ENOMEM);
         }
 
-        memset(pd, 0, sizeof(struct ehca_pd));
         pd->ownpid = current->tgid;
 
         /*
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index 95efef921f1d..df0516f24379 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -450,13 +450,12 @@ struct ib_qp *ehca_create_qp(struct ib_pd *pd,
         if (pd->uobject && udata)
                 context = pd->uobject->context;
 
-        my_qp = kmem_cache_alloc(qp_cache, GFP_KERNEL);
+        my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
         if (!my_qp) {
                 ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
                 return ERR_PTR(-ENOMEM);
         }
 
-        memset(my_qp, 0, sizeof(struct ehca_qp));
         memset (&parms, 0, sizeof(struct ehca_alloc_qp_parms));
         spin_lock_init(&my_qp->spinlock_s);
         spin_lock_init(&my_qp->spinlock_r);
diff --git a/drivers/scsi/aic94xx/aic94xx_hwi.c b/drivers/scsi/aic94xx/aic94xx_hwi.c
index da94e126ca83..0cd7eed9196c 100644
--- a/drivers/scsi/aic94xx/aic94xx_hwi.c
+++ b/drivers/scsi/aic94xx/aic94xx_hwi.c
@@ -1052,10 +1052,9 @@ static inline struct asd_ascb *asd_ascb_alloc(struct asd_ha_struct *asd_ha,
         struct asd_ascb *ascb;
         unsigned long flags;
 
-        ascb = kmem_cache_alloc(asd_ascb_cache, gfp_flags);
+        ascb = kmem_cache_zalloc(asd_ascb_cache, gfp_flags);
 
         if (ascb) {
-                memset(ascb, 0, sizeof(*ascb));
                 ascb->dma_scb.size = sizeof(struct scb);
                 ascb->dma_scb.vaddr = dma_pool_alloc(asd_ha->scb_pool,
                                                      gfp_flags,
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f02f48a882a9..a1cd6e6a292a 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -388,10 +388,9 @@ int scsi_execute_async(struct scsi_device *sdev, const unsigned char *cmd,
         int err = 0;
         int write = (data_direction == DMA_TO_DEVICE);
 
-        sioc = kmem_cache_alloc(scsi_io_context_cache, gfp);
+        sioc = kmem_cache_zalloc(scsi_io_context_cache, gfp);
         if (!sioc)
                 return DRIVER_ERROR << 24;
-        memset(sioc, 0, sizeof(*sioc));
 
         req = blk_get_request(sdev->request_queue, write, gfp);
         if (!req)
diff --git a/drivers/usb/host/hc_crisv10.c b/drivers/usb/host/hc_crisv10.c
index 282d82efc0b0..f0ffb8907f29 100644
--- a/drivers/usb/host/hc_crisv10.c
+++ b/drivers/usb/host/hc_crisv10.c
@@ -2163,9 +2163,8 @@ static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid)
 
         maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 
-        sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
+        sb_desc = kmem_cache_zalloc(usb_desc_cache, SLAB_FLAG);
         assert(sb_desc != NULL);
-        memset(sb_desc, 0, sizeof(USB_SB_Desc_t));
 
 
         if (usb_pipeout(urb->pipe)) {
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 2cbb239e63f8..68e66b33e726 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -624,12 +624,10 @@ static inline struct urb_priv *uhci_alloc_urb_priv(struct uhci_hcd *uhci,
 {
         struct urb_priv *urbp;
 
-        urbp = kmem_cache_alloc(uhci_up_cachep, GFP_ATOMIC);
+        urbp = kmem_cache_zalloc(uhci_up_cachep, GFP_ATOMIC);
         if (!urbp)
                 return NULL;
 
-        memset((void *)urbp, 0, sizeof(*urbp));
-
         urbp->urb = urb;
         urb->hcpriv = urbp;
         
diff --git a/fs/aio.c b/fs/aio.c
index ee662589e5ec..0b4ee0a5c83e 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -211,11 +211,10 @@ static struct kioctx *ioctx_alloc(unsigned nr_events)
         if ((unsigned long)nr_events > aio_max_nr)
                 return ERR_PTR(-EAGAIN);
 
-        ctx = kmem_cache_alloc(kioctx_cachep, GFP_KERNEL);
+        ctx = kmem_cache_zalloc(kioctx_cachep, GFP_KERNEL);
         if (!ctx)
                 return ERR_PTR(-ENOMEM);
 
-        memset(ctx, 0, sizeof(*ctx));
         ctx->max_reqs = nr_events;
         mm = ctx->mm = current->mm;
         atomic_inc(&mm->mm_count);
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 1814ba446809..9371ee209954 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -72,11 +72,10 @@ static struct configfs_dirent *configfs_new_dirent(struct configfs_dirent * pare
 {
         struct configfs_dirent * sd;
 
-        sd = kmem_cache_alloc(configfs_dir_cachep, GFP_KERNEL);
+        sd = kmem_cache_zalloc(configfs_dir_cachep, GFP_KERNEL);
         if (!sd)
                 return NULL;
 
-        memset(sd, 0, sizeof(*sd));
         atomic_set(&sd->s_count, 1);
         INIT_LIST_HEAD(&sd->s_links);
         INIT_LIST_HEAD(&sd->s_children);
diff --git a/fs/dlm/memory.c b/fs/dlm/memory.c
index 5352b03ff5aa..f858fef6e41c 100644
--- a/fs/dlm/memory.c
+++ b/fs/dlm/memory.c
@@ -76,9 +76,7 @@ struct dlm_lkb *allocate_lkb(struct dlm_ls *ls)
 {
         struct dlm_lkb *lkb;
 
-        lkb = kmem_cache_alloc(lkb_cache, GFP_KERNEL);
-        if (lkb)
-                memset(lkb, 0, sizeof(*lkb));
+        lkb = kmem_cache_zalloc(lkb_cache, GFP_KERNEL);
         return lkb;
 }
 
diff --git a/fs/dquot.c b/fs/dquot.c
index 0952cc474d9a..a561fb29e203 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -600,11 +600,10 @@ static struct dquot *get_empty_dquot(struct super_block *sb, int type)
 {
         struct dquot *dquot;
 
-        dquot = kmem_cache_alloc(dquot_cachep, GFP_NOFS);
+        dquot = kmem_cache_zalloc(dquot_cachep, GFP_NOFS);
         if(!dquot)
                 return NODQUOT;
 
-        memset((caddr_t)dquot, 0, sizeof(struct dquot));
         mutex_init(&dquot->dq_lock);
         INIT_LIST_HEAD(&dquot->dq_free);
         INIT_LIST_HEAD(&dquot->dq_inuse);
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index a86a55ccf874..75bbfae55081 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1332,13 +1332,13 @@ int ecryptfs_write_headers(struct dentry *ecryptfs_dentry,
                 goto out;
         }
         /* Released in this function */
-        page_virt = kmem_cache_alloc(ecryptfs_header_cache_0, GFP_USER);
+        page_virt = kmem_cache_zalloc(ecryptfs_header_cache_0, GFP_USER);
         if (!page_virt) {
                 ecryptfs_printk(KERN_ERR, "Out of memory\n");
                 rc = -ENOMEM;
                 goto out;
         }
-        memset(page_virt, 0, PAGE_CACHE_SIZE);
+
         rc = ecryptfs_write_headers_virt(page_virt, crypt_stat,
                                          ecryptfs_dentry);
         if (unlikely(rc)) {
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index c5a2e5298f15..779c3477d93c 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -251,7 +251,7 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
         int lower_flags;
 
         /* Released in ecryptfs_release or end of function if failure */
-        file_info = kmem_cache_alloc(ecryptfs_file_info_cache, GFP_KERNEL);
+        file_info = kmem_cache_zalloc(ecryptfs_file_info_cache, GFP_KERNEL);
         ecryptfs_set_file_private(file, file_info);
         if (!file_info) {
                 ecryptfs_printk(KERN_ERR,
@@ -259,7 +259,6 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
                 rc = -ENOMEM;
                 goto out;
         }
-        memset(file_info, 0, sizeof(*file_info));
         lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
         crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
         mount_crypt_stat = &ecryptfs_superblock_to_private(
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 11f5e5076aef..d4f02f3e18d7 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -361,8 +361,7 @@ static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
                 goto out;
         }
         /* Released in this function */
-        page_virt =
-            (char *)kmem_cache_alloc(ecryptfs_header_cache_2,
+        page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2,
                                      GFP_USER);
         if (!page_virt) {
                 rc = -ENOMEM;
@@ -370,7 +369,7 @@ static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
                                 "Cannot ecryptfs_kmalloc a page\n");
                 goto out_dput;
         }
-        memset(page_virt, 0, PAGE_CACHE_SIZE);
+
         rc = ecryptfs_read_header_region(page_virt, lower_dentry, nd->mnt);
         crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
         if (!ECRYPTFS_CHECK_FLAG(crypt_stat->flags, ECRYPTFS_POLICY_APPLIED))
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 745c0f1bfbbd..80bccd5ff8e6 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -207,14 +207,12 @@ parse_tag_3_packet(struct ecryptfs_crypt_stat *crypt_stat,
         /* Released: wipe_auth_tok_list called in ecryptfs_parse_packet_set or
          * at end of function upon failure */
         auth_tok_list_item =
-            kmem_cache_alloc(ecryptfs_auth_tok_list_item_cache, GFP_KERNEL);
+            kmem_cache_zalloc(ecryptfs_auth_tok_list_item_cache, GFP_KERNEL);
         if (!auth_tok_list_item) {
                 ecryptfs_printk(KERN_ERR, "Unable to allocate memory\n");
                 rc = -ENOMEM;
                 goto out;
         }
-        memset(auth_tok_list_item, 0,
-               sizeof(struct ecryptfs_auth_tok_list_item));
         (*new_auth_tok) = &auth_tok_list_item->auth_tok;
 
         /* check for body size - one to two bytes */
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index d0541ae8faba..fe41ab1566ee 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -378,15 +378,13 @@ ecryptfs_fill_super(struct super_block *sb, void *raw_data, int silent)
 
         /* Released in ecryptfs_put_super() */
         ecryptfs_set_superblock_private(sb,
-                                        kmem_cache_alloc(ecryptfs_sb_info_cache,
+                                        kmem_cache_zalloc(ecryptfs_sb_info_cache,
                                                          GFP_KERNEL));
         if (!ecryptfs_superblock_to_private(sb)) {
                 ecryptfs_printk(KERN_WARNING, "Out of memory\n");
                 rc = -ENOMEM;
                 goto out;
         }
-        memset(ecryptfs_superblock_to_private(sb), 0,
-               sizeof(struct ecryptfs_sb_info));
         sb->s_op = &ecryptfs_sops;
         /* Released through deactivate_super(sb) from get_sb_nodev */
         sb->s_root = d_alloc(NULL, &(const struct qstr) {
@@ -402,7 +400,7 @@ ecryptfs_fill_super(struct super_block *sb, void *raw_data, int silent)
         /* Released in d_release when dput(sb->s_root) is called */
         /* through deactivate_super(sb) from get_sb_nodev() */
         ecryptfs_set_dentry_private(sb->s_root,
-                                    kmem_cache_alloc(ecryptfs_dentry_info_cache,
+                                    kmem_cache_zalloc(ecryptfs_dentry_info_cache,
                                                      GFP_KERNEL));
         if (!ecryptfs_dentry_to_private(sb->s_root)) {
                 ecryptfs_printk(KERN_ERR,
@@ -410,8 +408,6 @@ ecryptfs_fill_super(struct super_block *sb, void *raw_data, int silent)
                 rc = -ENOMEM;
                 goto out;
         }
-        memset(ecryptfs_dentry_to_private(sb->s_root), 0,
-               sizeof(struct ecryptfs_dentry_info));
         rc = 0;
 out:
         /* Should be able to rely on deactivate_super called from
diff --git a/fs/exec.c b/fs/exec.c
index 11fe93f7363c..7e36c6f6f538 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -405,12 +405,10 @@ int setup_arg_pages(struct linux_binprm *bprm,
                 bprm->loader += stack_base;
         bprm->exec += stack_base;
 
-        mpnt = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+        mpnt = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
         if (!mpnt)
                 return -ENOMEM;
 
-        memset(mpnt, 0, sizeof(*mpnt));
-
         down_write(&mm->mmap_sem);
         {
                 mpnt->vm_mm = mm;
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 0e34d9918973..e62d4f620c58 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -282,8 +282,7 @@ void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
                 return;
         }
 
-        bd = kmem_cache_alloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL),
-        memset(bd, 0, sizeof(struct gfs2_bufdata));
+        bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL),
         bd->bd_bh = bh;
         bd->bd_gl = gl;
 
diff --git a/fs/namespace.c b/fs/namespace.c
index 5ef336c1103c..fd999cab7b57 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -53,9 +53,8 @@ static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)
 
 struct vfsmount *alloc_vfsmnt(const char *name)
 {
-        struct vfsmount *mnt = kmem_cache_alloc(mnt_cache, GFP_KERNEL);
+        struct vfsmount *mnt = kmem_cache_zalloc(mnt_cache, GFP_KERNEL);
         if (mnt) {
-                memset(mnt, 0, sizeof(struct vfsmount));
                 atomic_set(&mnt->mnt_count, 1);
                 INIT_LIST_HEAD(&mnt->mnt_hash);
                 INIT_LIST_HEAD(&mnt->mnt_child);
diff --git a/fs/smbfs/request.c b/fs/smbfs/request.c
index a4bcae8a9aff..42261dbdf60f 100644
--- a/fs/smbfs/request.c
+++ b/fs/smbfs/request.c
@@ -61,7 +61,7 @@ static struct smb_request *smb_do_alloc_request(struct smb_sb_info *server,
         struct smb_request *req;
         unsigned char *buf = NULL;
 
-        req = kmem_cache_alloc(req_cachep, GFP_KERNEL);
+        req = kmem_cache_zalloc(req_cachep, GFP_KERNEL);
         VERBOSE("allocating request: %p\n", req);
         if (!req)
                 goto out;
@@ -74,7 +74,6 @@ static struct smb_request *smb_do_alloc_request(struct smb_sb_info *server,
                 }
         }
 
-        memset(req, 0, sizeof(struct smb_request));
         req->rq_buffer = buf;
         req->rq_bufsize = bufsize;
         req->rq_server = server;
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 9dcdf556c99c..9e95e7abaf69 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -37,11 +37,10 @@ static struct sysfs_dirent * __sysfs_new_dirent(void * element)
 {
         struct sysfs_dirent * sd;
 
-        sd = kmem_cache_alloc(sysfs_dir_cachep, GFP_KERNEL);
+        sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
         if (!sd)
                 return NULL;
 
-        memset(sd, 0, sizeof(*sd));
         atomic_set(&sd->s_count, 1);
         atomic_set(&sd->s_event, 1);
         INIT_LIST_HEAD(&sd->s_children);
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 0c775fceb675..0689e004a281 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -558,10 +558,9 @@ struct sas_task {
 static inline struct sas_task *sas_alloc_task(gfp_t flags)
 {
         extern struct kmem_cache *sas_task_cache;
-        struct sas_task *task = kmem_cache_alloc(sas_task_cache, flags);
+        struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
 
         if (task) {
-                memset(task, 0, sizeof(*task));
                 INIT_LIST_HEAD(&task->list);
                 spin_lock_init(&task->task_state_lock);
                 task->task_state_flags = SAS_TASK_STATE_PENDING;
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 5fe87de10ff0..a1bf61617839 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -399,10 +399,9 @@ EXPORT_SYMBOL_GPL(register_posix_clock);
 static struct k_itimer * alloc_posix_timer(void)
 {
         struct k_itimer *tmr;
-        tmr = kmem_cache_alloc(posix_timers_cache, GFP_KERNEL);
+        tmr = kmem_cache_zalloc(posix_timers_cache, GFP_KERNEL);
         if (!tmr)
                 return tmr;
-        memset(tmr, 0, sizeof (struct k_itimer));
         if (unlikely(!(tmr->sigq = sigqueue_alloc()))) {
                 kmem_cache_free(posix_timers_cache, tmr);
                 tmr = NULL;
diff --git a/net/core/dst.c b/net/core/dst.c
index 1a53fb39b7e0..f9eace78d354 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -132,10 +132,9 @@ void * dst_alloc(struct dst_ops * ops)
                 if (ops->gc())
                         return NULL;
         }
-        dst = kmem_cache_alloc(ops->kmem_cachep, GFP_ATOMIC);
+        dst = kmem_cache_zalloc(ops->kmem_cachep, GFP_ATOMIC);
         if (!dst)
                 return NULL;
-        memset(dst, 0, ops->entry_size);
         atomic_set(&dst->__refcnt, 0);
         dst->ops = ops;
         dst->lastuse = jiffies;
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 054d46493d2b..efb673ad1854 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -251,12 +251,10 @@ static struct neighbour *neigh_alloc(struct neigh_table *tbl)
                         goto out_entries;
         }
 
-        n = kmem_cache_alloc(tbl->kmem_cachep, GFP_ATOMIC);
+        n = kmem_cache_zalloc(tbl->kmem_cachep, GFP_ATOMIC);
         if (!n)
                 goto out_entries;
 
-        memset(n, 0, tbl->entry_size);
-
         skb_queue_head_init(&n->arp_queue);
         rwlock_init(&n->lock);
         n->updated        = n->used = now;
diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
index c1f0cc1b1c60..720501e1ae20 100644
--- a/net/decnet/dn_table.c
+++ b/net/decnet/dn_table.c
@@ -593,12 +593,10 @@ create:
 
 replace:
         err = -ENOBUFS;
-        new_f = kmem_cache_alloc(dn_hash_kmem, GFP_KERNEL);
+        new_f = kmem_cache_zalloc(dn_hash_kmem, GFP_KERNEL);
         if (new_f == NULL)
                 goto out;
 
-        memset(new_f, 0, sizeof(struct dn_fib_node));
-
         new_f->fn_key = key;
         new_f->fn_type = type;
         new_f->fn_scope = r->rtm_scope;
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index ecb5422ea237..d7e1e60f51d5 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -479,20 +479,18 @@ static struct mfc_cache *ipmr_cache_find(__be32 origin, __be32 mcastgrp)
  */
 static struct mfc_cache *ipmr_cache_alloc(void)
 {
-        struct mfc_cache *c=kmem_cache_alloc(mrt_cachep, GFP_KERNEL);
+        struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
         if(c==NULL)
                 return NULL;
-        memset(c, 0, sizeof(*c));
         c->mfc_un.res.minvif = MAXVIFS;
         return c;
 }
 
 static struct mfc_cache *ipmr_cache_alloc_unres(void)
 {
-        struct mfc_cache *c=kmem_cache_alloc(mrt_cachep, GFP_ATOMIC);
+        struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
         if(c==NULL)
                 return NULL;
-        memset(c, 0, sizeof(*c));
         skb_queue_head_init(&c->mfc_un.unres.unresolved);
         c->mfc_un.unres.expires = jiffies + 10*HZ;
         return c;
diff --git a/net/ipv4/ipvs/ip_vs_conn.c b/net/ipv4/ipvs/ip_vs_conn.c
index 8086787a2c51..3aec4ac66e3c 100644
--- a/net/ipv4/ipvs/ip_vs_conn.c
+++ b/net/ipv4/ipvs/ip_vs_conn.c
@@ -603,13 +603,12 @@ ip_vs_conn_new(int proto, __be32 caddr, __be16 cport, __be32 vaddr, __be16 vport
         struct ip_vs_conn *cp;
         struct ip_vs_protocol *pp = ip_vs_proto_get(proto);
 
-        cp = kmem_cache_alloc(ip_vs_conn_cachep, GFP_ATOMIC);
+        cp = kmem_cache_zalloc(ip_vs_conn_cachep, GFP_ATOMIC);
         if (cp == NULL) {
                 IP_VS_ERR_RL("ip_vs_conn_new: no memory available.\n");
                 return NULL;
         }
 
-        memset(cp, 0, sizeof(*cp));
         INIT_LIST_HEAD(&cp->c_list);
         init_timer(&cp->timer);
         cp->timer.data     = (unsigned long)cp;
diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c
index 8556a4f4f60a..62be2eb37698 100644
--- a/net/ipv4/netfilter/ip_conntrack_core.c
+++ b/net/ipv4/netfilter/ip_conntrack_core.c
@@ -638,14 +638,13 @@ struct ip_conntrack *ip_conntrack_alloc(struct ip_conntrack_tuple *orig,
                 }
         }
 
-        conntrack = kmem_cache_alloc(ip_conntrack_cachep, GFP_ATOMIC);
+        conntrack = kmem_cache_zalloc(ip_conntrack_cachep, GFP_ATOMIC);
         if (!conntrack) {
                 DEBUGP("Can't allocate conntrack.\n");
                 atomic_dec(&ip_conntrack_count);
                 return ERR_PTR(-ENOMEM);
         }
 
-        memset(conntrack, 0, sizeof(*conntrack));
         atomic_set(&conntrack->ct_general.use, 1);
         conntrack->ct_general.destroy = destroy_conntrack;
         conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple = *orig;
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 96d8310ae9c8..827f8842b578 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -150,8 +150,7 @@ static __inline__ struct fib6_node * node_alloc(void)
 {
         struct fib6_node *fn;
 
-        if ((fn = kmem_cache_alloc(fib6_node_kmem, GFP_ATOMIC)) != NULL)
-                memset(fn, 0, sizeof(struct fib6_node));
+        fn = kmem_cache_zalloc(fib6_node_kmem, GFP_ATOMIC);
 
         return fn;
 }
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 0b1ddb1005ac..783481860174 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -979,11 +979,10 @@ struct sctp_chunk *sctp_chunkify(struct sk_buff *skb,
 {
         struct sctp_chunk *retval;
 
-        retval = kmem_cache_alloc(sctp_chunk_cachep, GFP_ATOMIC);
+        retval = kmem_cache_zalloc(sctp_chunk_cachep, GFP_ATOMIC);
 
         if (!retval)
                 goto nodata;
-        memset(retval, 0, sizeof(struct sctp_chunk));
 
         if (!sk) {
                 SCTP_DEBUG_PRINTK("chunkifying skb %p w/o an sk\n", skb);
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index e7c0b5e2066b..da8caf10ef97 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -332,11 +332,10 @@ static struct avc_node *avc_alloc_node(void)
 {
         struct avc_node *node;
 
-        node = kmem_cache_alloc(avc_node_cachep, GFP_ATOMIC);
+        node = kmem_cache_zalloc(avc_node_cachep, GFP_ATOMIC);
         if (!node)
                 goto out;
 
-        memset(node, 0, sizeof(*node));
         INIT_RCU_HEAD(&node->rhead);
         INIT_LIST_HEAD(&node->list);
         atomic_set(&node->ae.used, 1);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 65fb5e8ea941..9eeab82719a2 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -181,11 +181,10 @@ static int inode_alloc_security(struct inode *inode)
         struct task_security_struct *tsec = current->security;
         struct inode_security_struct *isec;
 
-        isec = kmem_cache_alloc(sel_inode_cache, GFP_KERNEL);
+        isec = kmem_cache_zalloc(sel_inode_cache, GFP_KERNEL);
         if (!isec)
                 return -ENOMEM;
 
-        memset(isec, 0, sizeof(*isec));
         mutex_init(&isec->lock);
         INIT_LIST_HEAD(&isec->list);
         isec->inode = inode;
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index ebb993c5c244..9142073319c0 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -36,10 +36,9 @@ avtab_insert_node(struct avtab *h, int hvalue,
                   struct avtab_key *key, struct avtab_datum *datum)
 {
         struct avtab_node * newnode;
-        newnode = kmem_cache_alloc(avtab_node_cachep, GFP_KERNEL);
+        newnode = kmem_cache_zalloc(avtab_node_cachep, GFP_KERNEL);
         if (newnode == NULL)
                 return NULL;
-        memset(newnode, 0, sizeof(struct avtab_node));
         newnode->key = *key;
         newnode->datum = *datum;
         if (prev) {