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SubjectRe: [PATCH] some kmalloc/memset ->kzalloc (tree wide)

On Jul 6 2007 18:51, Yoann Padioleau wrote:
>Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc).
>
>Here is a short excerpt of the semantic patch performing
>this transformation:

Cool!

>--- a/Documentation/connector/cn_test.c
>+++ b/Documentation/connector/cn_test.c
>@@ -124,9 +124,8 @@ static void cn_test_timer_func(unsigned
> struct cn_msg *m;
> char data[32];
>
>- m = kmalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC);
>+ m = kzalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC);
> if (m) {
>- memset(m, 0, sizeof(*m) + sizeof(data));
>
> memcpy(&m->id, &cn_test_id, sizeof(m->id));
> m->seq = cn_test_timer_counter;

Such empty lines (after memset) [c|s]hould also go.
>index e83f1db..deb7b6a 100644
>--- a/block/scsi_ioctl.c
>+++ b/block/scsi_ioctl.c
>@@ -405,11 +405,10 @@ int sg_scsi_ioctl(struct file *file, str
>
> bytes = max(in_len, out_len);
> if (bytes) {
>- buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
>+ buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
> if (!buffer)
> return -ENOMEM;
>
>- memset(buffer, 0, bytes);
> }

And in this case, empty line before memset.
(Either of - do not let remove empty lines in both directoriens around memset)

>@@ -1616,7 +1616,6 @@ #endif
> goto err_out_regions;
> }
>
>- memset(host, 0, sizeof(*host));
> host->pdev = pdev;
> host->flags = pci_dac ? FL_DAC : 0;
> spin_lock_init(&host->lock);

And in this case, no blank lines should be removed.


These are just suggestions. If it is too much work, leave it as-is. :)


Jan
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