A previous patch was sent to address this issue at, https://lkml.org/lkml/2011/5/23/305. Joe Perches suggest that, its best to use kcalloc for array allocation instead of kzalloc. This version addresses this issue.

Changes since V0: Use kcalloc instead of kzalloc for array allocation.

Signed-off-by: Rakib Mullick rakib.mullick@gmail.com ---

diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c index 1c4b3aa..168b78f 100644 --- a/drivers/ata/sata_dwc_460ex.c +++ b/drivers/ata/sata_dwc_460ex.c @@ -1638,13 +1638,12 @@ static int sata_dwc_probe(struct platform_device *ofdev) const struct ata_port_info *ppi[] = { &pi, NULL };

/* Allocate DWC SATA device */ - hsdev = kmalloc(sizeof(*hsdev), GFP_KERNEL); + hsdev = kzalloc(sizeof(*hsdev), GFP_KERNEL); if (hsdev == NULL) { dev_err(&ofdev->dev, "kmalloc failed for hsdev\n"); err = -ENOMEM; goto error_out; } - memset(hsdev, 0, sizeof(*hsdev));

/* Ioremap SATA registers */ base = of_iomap(ofdev->dev.of_node, 0); diff --git a/drivers/gpu/drm/drm_scatter.c b/drivers/gpu/drm/drm_scatter.c index d15e09b..7525e03 100644 --- a/drivers/gpu/drm/drm_scatter.c +++ b/drivers/gpu/drm/drm_scatter.c @@ -83,30 +83,26 @@ int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request) if (dev->sg) return -EINVAL;

- entry = kmalloc(sizeof(*entry), GFP_KERNEL); + entry = kzalloc(sizeof(*entry), GFP_KERNEL); if (!entry) return -ENOMEM;

- memset(entry, 0, sizeof(*entry)); pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; DRM_DEBUG("size=%ld pages=%ld\n", request->size, pages);

entry->pages = pages; - entry->pagelist = kmalloc(pages * sizeof(*entry->pagelist), GFP_KERNEL); + entry->pagelist = kcalloc(pages, sizeof(*entry->pagelist), GFP_KERNEL); if (!entry->pagelist) { kfree(entry); return -ENOMEM; }

- memset(entry->pagelist, 0, pages * sizeof(*entry->pagelist)); - - entry->busaddr = kmalloc(pages * sizeof(*entry->busaddr), GFP_KERNEL); + entry->busaddr = kcalloc(pages, sizeof(*entry->busaddr), GFP_KERNEL); if (!entry->busaddr) { kfree(entry->pagelist); kfree(entry); return -ENOMEM; } - memset((void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr));

entry->virtual = drm_vmalloc_dma(pages << PAGE_SHIFT); if (!entry->virtual) { diff --git a/drivers/gpu/drm/radeon/radeon_mem.c b/drivers/gpu/drm/radeon/radeon_mem.c index ed95155..988548e 100644 --- a/drivers/gpu/drm/radeon/radeon_mem.c +++ b/drivers/gpu/drm/radeon/radeon_mem.c @@ -139,7 +139,7 @@ static int init_heap(struct mem_block **heap, int start, int size) if (!blocks) return -ENOMEM;

- *heap = kmalloc(sizeof(**heap), GFP_KERNEL); + *heap = kzalloc(sizeof(**heap), GFP_KERNEL); if (!*heap) { kfree(blocks); return -ENOMEM; @@ -150,7 +150,6 @@ static int init_heap(struct mem_block **heap, int start, int size) blocks->file_priv = NULL; blocks->next = blocks->prev = *heap;

- memset(*heap, 0, sizeof(**heap)); (*heap)->file_priv = (struct drm_file *) - 1; (*heap)->next = (*heap)->prev = blocks; return 0; diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c index f1a52f9..07ce02d 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c @@ -585,11 +585,10 @@ int vmw_overlay_init(struct vmw_private *dev_priv) return -ENOSYS; }

- overlay = kmalloc(sizeof(*overlay), GFP_KERNEL); + overlay = kzalloc(sizeof(*overlay), GFP_KERNEL); if (!overlay) return -ENOMEM;

- memset(overlay, 0, sizeof(*overlay)); mutex_init(&overlay->mutex); for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { overlay->stream[i].buf = NULL; diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c index 5408b1b..bfe1bcc 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c @@ -612,11 +612,9 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data, srf->sizes[0].height == 64 && srf->format == SVGA3D_A8R8G8B8) {

- srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL); - /* clear the image */ - if (srf->snooper.image) { - memset(srf->snooper.image, 0x00, 64 * 64 * 4); - } else { + /* allocate image area and clear it */ + srf->snooper.image = kzalloc(64 * 64 * 4, GFP_KERNEL); + if (!srf->snooper.image) { DRM_ERROR("Failed to allocate cursor_image\n"); ret = -ENOMEM; goto out_err1; diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index be8d4cb..370de0b 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -1094,10 +1094,9 @@ static int vga_arb_open(struct inode *inode, struct file *file)

pr_debug("%s\n", __func__);

- priv = kmalloc(sizeof(struct vga_arb_private), GFP_KERNEL); + priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (priv == NULL) return -ENOMEM; - memset(priv, 0, sizeof(*priv)); spin_lock_init(&priv->lock); file->private_data = priv;