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From: Julia Lawall on 10 Mar 2010 16:20
From: Julia Lawall <julia(a)diku.dk>

kasprintf combines kmalloc and sprintf, and takes care of the size
calculation itself.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression a,flag;
expression list args;
statement S;
@@

a =
- \(kmalloc\|kzalloc\)(...,flag)
+ kasprintf(flag,args)
<... when != a
if (a == NULL || ...) S
...>
- sprintf(a,args);
// </smpl>

Signed-off-by: Julia Lawall <julia(a)diku.dk>

---
drivers/acpi/video.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff -u -p a/drivers/acpi/video.c b/drivers/acpi/video.c
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1005,11 +1005,10 @@ static void acpi_video_device_find_cap(s
result = acpi_video_init_brightness(device);
if (result)
return;
- name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+ name = kasprintf(GFP_KERNEL, "acpi_video%d", count++);
if (!name)
return;

- sprintf(name, "acpi_video%d", count++);
device->backlight = backlight_device_register(name,
NULL, device, &acpi_backlight_ops);
kfree(name);
@@ -1056,10 +1055,9 @@ static void acpi_video_device_find_cap(s
if (device->cap._DCS && device->cap._DSS) {
static int count;
char *name;
- name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+ name = kasprintf(GFP_KERNEL, "acpi_video%d", count++);
if (!name)
return;
- sprintf(name, "acpi_video%d", count++);
device->output_dev = video_output_register(name,
NULL, device, &acpi_output_properties);
kfree(name);
--
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Prev: [PATCH 5/6] drivers/base/module.c: Use kasprintf
Next: [PATCH 1/6] arch/powerpc/platforms/pseries: Use kasprintf