On Mon, 5 Nov 2007, Li Zefan wrote:
> The size passing to memset is wrong. And here we can replace
> kmalloc with kzalloc.
>
> Signed-off-by Li Zefan <[email protected]>
>
> ---
> arch/arm/common/uengine.c | 6 ++----
> 1 files changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/common/uengine.c b/arch/arm/common/uengine.c
> index 95c8508..117cab3 100644
> --- a/arch/arm/common/uengine.c
> +++ b/arch/arm/common/uengine.c
> @@ -374,8 +374,8 @@ static int set_initial_registers(int uengine, struct ixp2000_uengine_code *c)
> u8 *ucode;
> int i;
>
> - gpr_a = kmalloc(128 * sizeof(u32), GFP_KERNEL);
> - gpr_b = kmalloc(128 * sizeof(u32), GFP_KERNEL);
> + gpr_a = kzalloc(128 * sizeof(u32), GFP_KERNEL);
> + gpr_b = kzalloc(128 * sizeof(u32), GFP_KERNEL);
> ucode = kmalloc(513 * 5, GFP_KERNEL);
> if (gpr_a == NULL || gpr_b == NULL || ucode == NULL) {
> kfree(ucode);
> @@ -388,8 +388,6 @@ static int set_initial_registers(int uengine, struct ixp2000_uengine_code *c)
> if (c->uengine_parameters & IXP2000_UENGINE_4_CONTEXTS)
> per_ctx_regs = 32;
>
> - memset(gpr_a, 0, sizeof(gpr_a));
> - memset(gpr_b, 0, sizeof(gpr_b));
> for (i = 0; i < 256; i++) {
> struct ixp2000_reg_value *r = c->initial_reg_values + i;
> u32 *bank;
>
it's unlikely that patch will cause any trouble whatsoever, but
notice that it *is* changing the underlying logic. those original
memsets should probably have been written initially as
"sizeof(*gpr_a)" so they would previously have zeroed only memory the
^
size of a pointer, no?
now, i'm guessing the logic is correct but i figured it's worth
noting what the code *used* to do. unless i'm misreading something
horribly.
rday
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
http://crashcourse.ca
========================================================================
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