From: Thomas Huth <thuth@redhat.com>
To: Eric Blake <eblake@redhat.com>, qemu-devel@nongnu.org
Cc: qemu-trivial@nongnu.org
Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH 1/5] hw/dma/pxa2xx: Remove superfluous memset
Date: Fri, 9 Oct 2015 08:39:22 +0200 [thread overview]
Message-ID: <5617611A.90205@redhat.com> (raw)
In-Reply-To: <5616D94C.4040109@redhat.com>
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On 08/10/15 22:59, Eric Blake wrote:
> On 10/08/2015 01:35 PM, Thomas Huth wrote:
>> g_malloc0 already clears the memory, so no need for
>> the additional memset here.
>>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>> hw/dma/pxa2xx_dma.c | 1 -
>> 1 file changed, 1 deletion(-)
>>
>> diff --git a/hw/dma/pxa2xx_dma.c b/hw/dma/pxa2xx_dma.c
>> index d4501fb..3f0a720 100644
>> --- a/hw/dma/pxa2xx_dma.c
>> +++ b/hw/dma/pxa2xx_dma.c
>> @@ -461,7 +461,6 @@ static int pxa2xx_dma_init(SysBusDevice *sbd)
>>
>> s->chan = g_malloc0(sizeof(PXA2xxDMAChannel) * s->channels);
>
> As long as we're here, this should probably be switched to g_new0(), in
> part to avoid any chance that the multiply can overflow.
Ok, I doubt that we really get overflows here, but g_new0 is certainly
nicer here, so I'll change my patch accordingly.
Thomas
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WARNING: multiple messages have this Message-ID (diff)
From: Thomas Huth <thuth@redhat.com>
To: Eric Blake <eblake@redhat.com>, qemu-devel@nongnu.org
Cc: qemu-trivial@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 1/5] hw/dma/pxa2xx: Remove superfluous memset
Date: Fri, 9 Oct 2015 08:39:22 +0200 [thread overview]
Message-ID: <5617611A.90205@redhat.com> (raw)
In-Reply-To: <5616D94C.4040109@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 881 bytes --]
On 08/10/15 22:59, Eric Blake wrote:
> On 10/08/2015 01:35 PM, Thomas Huth wrote:
>> g_malloc0 already clears the memory, so no need for
>> the additional memset here.
>>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>> hw/dma/pxa2xx_dma.c | 1 -
>> 1 file changed, 1 deletion(-)
>>
>> diff --git a/hw/dma/pxa2xx_dma.c b/hw/dma/pxa2xx_dma.c
>> index d4501fb..3f0a720 100644
>> --- a/hw/dma/pxa2xx_dma.c
>> +++ b/hw/dma/pxa2xx_dma.c
>> @@ -461,7 +461,6 @@ static int pxa2xx_dma_init(SysBusDevice *sbd)
>>
>> s->chan = g_malloc0(sizeof(PXA2xxDMAChannel) * s->channels);
>
> As long as we're here, this should probably be switched to g_new0(), in
> part to avoid any chance that the multiply can overflow.
Ok, I doubt that we really get overflows here, but g_new0 is certainly
nicer here, so I'll change my patch accordingly.
Thomas
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next prev parent reply other threads:[~2015-10-09 15:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-08 19:35 [Qemu-trivial] [PATCH 0/5] Small optimizations for code using g_malloc0 + memset/memcpy Thomas Huth
2015-10-08 19:35 ` [Qemu-devel] " Thomas Huth
2015-10-08 19:35 ` [Qemu-trivial] [PATCH 1/5] hw/dma/pxa2xx: Remove superfluous memset Thomas Huth
2015-10-08 19:35 ` [Qemu-devel] " Thomas Huth
2015-10-08 20:59 ` [Qemu-trivial] " Eric Blake
2015-10-08 20:59 ` Eric Blake
2015-10-09 6:39 ` Thomas Huth [this message]
2015-10-09 6:39 ` Thomas Huth
2015-10-08 19:35 ` [Qemu-trivial] [PATCH 2/5] hw/scsi/spapr_vscsi: " Thomas Huth
2015-10-08 19:35 ` [Qemu-devel] " Thomas Huth
2015-10-08 21:00 ` [Qemu-trivial] " Eric Blake
2015-10-08 21:00 ` Eric Blake
2015-10-09 1:51 ` [Qemu-trivial] " David Gibson
2015-10-09 1:51 ` [Qemu-devel] " David Gibson
2015-10-08 19:35 ` [Qemu-trivial] [PATCH 3/5] hw/input/tsc210x: " Thomas Huth
2015-10-08 19:35 ` [Qemu-devel] " Thomas Huth
2015-10-08 23:34 ` [Qemu-trivial] " Eric Blake
2015-10-08 23:34 ` Eric Blake
2015-10-09 6:40 ` [Qemu-trivial] " Thomas Huth
2015-10-09 6:40 ` Thomas Huth
2015-10-08 19:35 ` [Qemu-trivial] [PATCH 4/5] tests/i44fx-test: No need for zeroing memory before memset Thomas Huth
2015-10-08 19:35 ` [Qemu-devel] " Thomas Huth
2015-10-08 20:24 ` [Qemu-trivial] " Laszlo Ersek
2015-10-08 20:24 ` [Qemu-devel] " Laszlo Ersek
2015-10-09 6:36 ` [Qemu-trivial] " Thomas Huth
2015-10-09 6:36 ` [Qemu-devel] " Thomas Huth
2015-10-09 6:46 ` [Qemu-trivial] " Markus Armbruster
2015-10-09 6:46 ` Markus Armbruster
2015-10-09 8:08 ` [Qemu-trivial] " Laszlo Ersek
2015-10-09 8:08 ` Laszlo Ersek
2015-10-08 19:35 ` [Qemu-trivial] [PATCH 5/5] linux-user/syscall: Replace g_malloc0 + memcpy with g_memdup Thomas Huth
2015-10-08 19:35 ` [Qemu-devel] " Thomas Huth
2015-10-08 23:32 ` [Qemu-trivial] " Eric Blake
2015-10-08 23:32 ` Eric Blake
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