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qubes-linux-kernel/patches.xen/xen-kzalloc

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From: jbeulich@novell.com
Subject: use kzalloc() in favor of kmalloc()+memset()
Patch-mainline: n/a
Also use clear_page() in favor of memset(, 0, PAGE_SIZE).
--- head-2010-04-29.orig/drivers/xen/blkback/blkback.c 2010-03-25 14:38:05.000000000 +0100
+++ head-2010-04-29/drivers/xen/blkback/blkback.c 2010-04-28 16:32:16.000000000 +0200
@@ -671,7 +671,7 @@ static int __init blkif_init(void)
mmap_pages = blkif_reqs * BLKIF_MAX_SEGMENTS_PER_REQUEST;
- pending_reqs = kmalloc(sizeof(pending_reqs[0]) *
+ pending_reqs = kzalloc(sizeof(pending_reqs[0]) *
blkif_reqs, GFP_KERNEL);
pending_grant_handles = kmalloc(sizeof(pending_grant_handles[0]) *
mmap_pages, GFP_KERNEL);
@@ -688,7 +688,6 @@ static int __init blkif_init(void)
blkif_interface_init();
- memset(pending_reqs, 0, sizeof(pending_reqs));
INIT_LIST_HEAD(&pending_free);
for (i = 0; i < blkif_reqs; i++)
--- head-2010-04-29.orig/drivers/xen/blkback/interface.c 2010-03-24 15:09:22.000000000 +0100
+++ head-2010-04-29/drivers/xen/blkback/interface.c 2010-04-28 16:37:43.000000000 +0200
@@ -41,11 +41,10 @@ blkif_t *blkif_alloc(domid_t domid)
{
blkif_t *blkif;
- blkif = kmem_cache_alloc(blkif_cachep, GFP_KERNEL);
+ blkif = kmem_cache_alloc(blkif_cachep, GFP_KERNEL|__GFP_ZERO);
if (!blkif)
return ERR_PTR(-ENOMEM);
- memset(blkif, 0, sizeof(*blkif));
blkif->domid = domid;
spin_lock_init(&blkif->blk_ring_lock);
atomic_set(&blkif->refcnt, 1);
--- head-2010-04-29.orig/drivers/xen/blktap/interface.c 2010-03-24 15:09:22.000000000 +0100
+++ head-2010-04-29/drivers/xen/blktap/interface.c 2010-04-28 16:38:55.000000000 +0200
@@ -41,11 +41,10 @@ blkif_t *tap_alloc_blkif(domid_t domid)
{
blkif_t *blkif;
- blkif = kmem_cache_alloc(blkif_cachep, GFP_KERNEL);
+ blkif = kmem_cache_alloc(blkif_cachep, GFP_KERNEL|__GFP_ZERO);
if (!blkif)
return ERR_PTR(-ENOMEM);
- memset(blkif, 0, sizeof(*blkif));
blkif->domid = domid;
spin_lock_init(&blkif->blk_ring_lock);
atomic_set(&blkif->refcnt, 1);
--- head-2010-04-29.orig/drivers/xen/core/machine_reboot.c 2010-03-25 14:39:15.000000000 +0100
+++ head-2010-04-29/drivers/xen/core/machine_reboot.c 2010-04-28 17:04:28.000000000 +0200
@@ -102,7 +102,7 @@ static void post_suspend(int suspend_can
BUG();
HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
- memset(empty_zero_page, 0, PAGE_SIZE);
+ clear_page(empty_zero_page);
fpp = PAGE_SIZE/sizeof(unsigned long);
for (i = 0, j = 0, k = -1; i < max_pfn; i += fpp, j++) {
--- head-2010-04-29.orig/drivers/xen/core/smpboot.c 2010-04-15 11:43:29.000000000 +0200
+++ head-2010-04-29/drivers/xen/core/smpboot.c 2010-04-28 16:44:14.000000000 +0200
@@ -218,17 +218,12 @@ static void __cpuinit cpu_initialize_con
ctxt.flags = VGCF_IN_KERNEL;
ctxt.user_regs.ds = __USER_DS;
ctxt.user_regs.es = __USER_DS;
- ctxt.user_regs.fs = 0;
- ctxt.user_regs.gs = 0;
ctxt.user_regs.ss = __KERNEL_DS;
ctxt.user_regs.eip = (unsigned long)cpu_bringup_and_idle;
ctxt.user_regs.eflags = X86_EFLAGS_IF | 0x1000; /* IOPL_RING1 */
- memset(&ctxt.fpu_ctxt, 0, sizeof(ctxt.fpu_ctxt));
-
smp_trap_init(ctxt.trap_ctxt);
- ctxt.ldt_ents = 0;
ctxt.gdt_frames[0] = arbitrary_virt_to_mfn(get_cpu_gdt_table(cpu));
ctxt.gdt_ents = GDT_SIZE / 8;
--- head-2010-04-29.orig/drivers/xen/netback/interface.c 2010-04-30 10:42:29.000000000 +0200
+++ head-2010-04-29/drivers/xen/netback/interface.c 2010-04-30 10:49:15.000000000 +0200
@@ -227,7 +227,6 @@ netif_t *netif_alloc(struct device *pare
SET_NETDEV_DEV(dev, parent);
netif = netdev_priv(dev);
- memset(netif, 0, sizeof(*netif));
netif->domid = domid;
netif->group = UINT_MAX;
netif->handle = handle;
--- head-2010-04-29.orig/drivers/xen/scsiback/emulate.c 2010-03-24 15:10:29.000000000 +0100
+++ head-2010-04-29/drivers/xen/scsiback/emulate.c 2010-04-28 16:51:05.000000000 +0200
@@ -240,13 +240,11 @@ static void __report_luns(pending_req_t
alloc_len = sizeof(struct scsi_lun) * alloc_luns
+ VSCSI_REPORT_LUNS_HEADER;
retry:
- if ((buff = kmalloc(alloc_len, GFP_KERNEL)) == NULL) {
+ if ((buff = kzalloc(alloc_len, GFP_KERNEL)) == NULL) {
printk(KERN_ERR "scsiback:%s kmalloc err\n", __FUNCTION__);
goto fail;
}
- memset(buff, 0, alloc_len);
-
one_lun = (struct scsi_lun *) &buff[8];
spin_lock_irqsave(&info->v2p_lock, flags);
list_for_each_entry(entry, head, l) {
--- head-2010-04-29.orig/drivers/xen/scsiback/interface.c 2010-03-24 15:09:22.000000000 +0100
+++ head-2010-04-29/drivers/xen/scsiback/interface.c 2010-04-28 16:51:29.000000000 +0200
@@ -46,11 +46,10 @@ struct vscsibk_info *vscsibk_info_alloc(
{
struct vscsibk_info *info;
- info = kmem_cache_alloc(scsiback_cachep, GFP_KERNEL);
+ info = kmem_cache_alloc(scsiback_cachep, GFP_KERNEL|__GFP_ZERO);
if (!info)
return ERR_PTR(-ENOMEM);
- memset(info, 0, sizeof(*info));
info->domid = domid;
spin_lock_init(&info->ring_lock);
atomic_set(&info->nr_unreplied_reqs, 0);
--- head-2010-04-29.orig/drivers/xen/scsiback/scsiback.c 2010-03-24 15:25:21.000000000 +0100
+++ head-2010-04-29/drivers/xen/scsiback/scsiback.c 2010-04-28 16:52:02.000000000 +0200
@@ -676,7 +676,7 @@ static int __init scsiback_init(void)
mmap_pages = vscsiif_reqs * VSCSIIF_SG_TABLESIZE;
- pending_reqs = kmalloc(sizeof(pending_reqs[0]) *
+ pending_reqs = kzalloc(sizeof(pending_reqs[0]) *
vscsiif_reqs, GFP_KERNEL);
pending_grant_handles = kmalloc(sizeof(pending_grant_handles[0]) *
mmap_pages, GFP_KERNEL);
@@ -691,7 +691,6 @@ static int __init scsiback_init(void)
if (scsiback_interface_init() < 0)
goto out_of_kmem;
- memset(pending_reqs, 0, sizeof(pending_reqs));
INIT_LIST_HEAD(&pending_free);
for (i = 0; i < vscsiif_reqs; i++)
--- head-2010-04-29.orig/drivers/xen/sfc_netutil/accel_cuckoo_hash.c 2010-04-15 11:11:11.000000000 +0200
+++ head-2010-04-29/drivers/xen/sfc_netutil/accel_cuckoo_hash.c 2010-04-28 16:54:07.000000000 +0200
@@ -77,7 +77,7 @@ int cuckoo_hash_init(cuckoo_hash_table *
BUG_ON(length_bits >= sizeof(unsigned) * 8);
BUG_ON(key_length > sizeof(cuckoo_hash_key));
- table_mem = kmalloc(sizeof(cuckoo_hash_entry) * 2 * length, GFP_KERNEL);
+ table_mem = kzalloc(sizeof(cuckoo_hash_entry) * 2 * length, GFP_KERNEL);
if (table_mem == NULL)
return -ENOMEM;
@@ -93,9 +93,6 @@ int cuckoo_hash_init(cuckoo_hash_table *
set_hash_parameters(hashtab);
- /* Zero the table */
- memset(hashtab->table0, 0, length * 2 * sizeof(cuckoo_hash_entry));
-
return 0;
}
EXPORT_SYMBOL_GPL(cuckoo_hash_init);
--- head-2010-04-29.orig/drivers/xen/tpmback/interface.c 2010-03-24 15:09:22.000000000 +0100
+++ head-2010-04-29/drivers/xen/tpmback/interface.c 2010-04-28 16:55:39.000000000 +0200
@@ -26,11 +26,10 @@ static tpmif_t *alloc_tpmif(domid_t domi
{
tpmif_t *tpmif;
- tpmif = kmem_cache_alloc(tpmif_cachep, GFP_KERNEL);
+ tpmif = kmem_cache_alloc(tpmif_cachep, GFP_KERNEL|__GFP_ZERO);
if (tpmif == NULL)
goto out_of_memory;
- memset(tpmif, 0, sizeof (*tpmif));
tpmif->domid = domid;
tpmif->status = DISCONNECTED;
tpmif->bi = bi;
@@ -131,7 +130,7 @@ int tpmif_map(tpmif_t *tpmif, unsigned l
}
tpmif->tx = (tpmif_tx_interface_t *)tpmif->tx_area->addr;
- memset(tpmif->tx, 0, PAGE_SIZE);
+ clear_page(tpmif->tx);
err = bind_interdomain_evtchn_to_irqhandler(
tpmif->domid, evtchn, tpmif_be_int, 0, tpmif->devname, tpmif);
--- head-2010-04-29.orig/drivers/xen/usbback/usbback.c 2010-04-15 17:36:18.000000000 +0200
+++ head-2010-04-29/drivers/xen/usbback/usbback.c 2010-04-28 16:56:36.000000000 +0200
@@ -1149,7 +1149,7 @@ static int __init usbback_init(void)
return -ENODEV;
mmap_pages = usbif_reqs * USBIF_MAX_SEGMENTS_PER_REQUEST;
- pending_reqs = kmalloc(sizeof(pending_reqs[0]) *
+ pending_reqs = kzalloc(sizeof(pending_reqs[0]) *
usbif_reqs, GFP_KERNEL);
pending_grant_handles = kmalloc(sizeof(pending_grant_handles[0]) *
mmap_pages, GFP_KERNEL);
@@ -1163,7 +1163,6 @@ static int __init usbback_init(void)
for (i = 0; i < mmap_pages; i++)
pending_grant_handles[i] = USBBACK_INVALID_HANDLE;
- memset(pending_reqs, 0, sizeof(pending_reqs));
INIT_LIST_HEAD(&pending_free);
for (i = 0; i < usbif_reqs; i++)
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