* [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
@ 2022-03-18 14:52 Wan Jiabing
2022-04-30 6:29 ` Christophe JAILLET
2022-05-03 0:51 ` Martin K. Petersen
0 siblings, 2 replies; 8+ messages in thread
From: Wan Jiabing @ 2022-03-18 14:52 UTC (permalink / raw)
To: James Smart, Ram Vegesna, James E.J. Bottomley,
Martin K. Petersen, Wan Jiabing, Daniel Wagner, linux-scsi,
target-devel, linux-kernel
io->sgl is allocated by kzalloc(). The memory is set to zero.
It is unnecessary to call memset again.
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
---
drivers/scsi/elx/efct/efct_io.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/scsi/elx/efct/efct_io.c b/drivers/scsi/elx/efct/efct_io.c
index c3247b951a76..c612f0a48839 100644
--- a/drivers/scsi/elx/efct/efct_io.c
+++ b/drivers/scsi/elx/efct/efct_io.c
@@ -62,7 +62,6 @@ efct_io_pool_create(struct efct *efct, u32 num_sgl)
return NULL;
}
- memset(io->sgl, 0, sizeof(*io->sgl) * num_sgl);
io->sgl_allocated = num_sgl;
io->sgl_count = 0;
--
2.35.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
2022-03-18 14:52 [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io Wan Jiabing
@ 2022-04-30 6:29 ` Christophe JAILLET
2022-05-03 0:51 ` Martin K. Petersen
1 sibling, 0 replies; 8+ messages in thread
From: Christophe JAILLET @ 2022-04-30 6:29 UTC (permalink / raw)
To: Wan Jiabing, James Smart, Ram Vegesna, James E.J. Bottomley,
Martin K. Petersen, Daniel Wagner, linux-scsi, target-devel,
linux-kernel
Le 18/03/2022 à 15:52, Wan Jiabing a écrit :
> io->sgl is allocated by kzalloc(). The memory is set to zero.
> It is unnecessary to call memset again.
>
Hi,
Nitpick: this kzalloc() should be a kcalloc() to avoid an open-coded
multiplication when computing the size to allocate.
CJ
> Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
> ---
> drivers/scsi/elx/efct/efct_io.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/scsi/elx/efct/efct_io.c b/drivers/scsi/elx/efct/efct_io.c
> index c3247b951a76..c612f0a48839 100644
> --- a/drivers/scsi/elx/efct/efct_io.c
> +++ b/drivers/scsi/elx/efct/efct_io.c
> @@ -62,7 +62,6 @@ efct_io_pool_create(struct efct *efct, u32 num_sgl)
> return NULL;
> }
>
> - memset(io->sgl, 0, sizeof(*io->sgl) * num_sgl);
> io->sgl_allocated = num_sgl;
> io->sgl_count = 0;
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
@ 2022-04-30 6:29 ` Christophe JAILLET
0 siblings, 0 replies; 8+ messages in thread
From: Christophe JAILLET @ 2022-04-30 6:29 UTC (permalink / raw)
To: linux-scsi; +Cc: target-devel, linux-kernel
Le 18/03/2022 à 15:52, Wan Jiabing a écrit :
> io->sgl is allocated by kzalloc(). The memory is set to zero.
> It is unnecessary to call memset again.
>
Hi,
Nitpick: this kzalloc() should be a kcalloc() to avoid an open-coded
multiplication when computing the size to allocate.
CJ
> Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
> ---
> drivers/scsi/elx/efct/efct_io.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/scsi/elx/efct/efct_io.c b/drivers/scsi/elx/efct/efct_io.c
> index c3247b951a76..c612f0a48839 100644
> --- a/drivers/scsi/elx/efct/efct_io.c
> +++ b/drivers/scsi/elx/efct/efct_io.c
> @@ -62,7 +62,6 @@ efct_io_pool_create(struct efct *efct, u32 num_sgl)
> return NULL;
> }
>
> - memset(io->sgl, 0, sizeof(*io->sgl) * num_sgl);
> io->sgl_allocated = num_sgl;
> io->sgl_count = 0;
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
2022-04-30 6:29 ` Christophe JAILLET
@ 2022-04-30 7:48 ` Finn Thain
-1 siblings, 0 replies; 8+ messages in thread
From: Finn Thain @ 2022-04-30 7:48 UTC (permalink / raw)
To: Christophe JAILLET
Cc: Wan Jiabing, James Smart, Ram Vegesna, James E.J. Bottomley,
Martin K. Petersen, Daniel Wagner, linux-scsi, target-devel,
linux-kernel, cocci
[-- Attachment #1: Type: text/plain, Size: 490 bytes --]
On Sat, 30 Apr 2022, Christophe JAILLET wrote:
> Le 18/03/2022 à 15:52, Wan Jiabing a écrit :
> > io->sgl is allocated by kzalloc(). The memory is set to zero.
> > It is unnecessary to call memset again.
> >
>
> Hi,
>
> Nitpick: this kzalloc() should be a kcalloc() to avoid an open-coded
> multiplication when computing the size to allocate.
>
Seems like kcalloc() conversion could be a separate patch. Perhaps it
could be done everywhere using a coccinelle script.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [cocci] [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
@ 2022-04-30 7:48 ` Finn Thain
0 siblings, 0 replies; 8+ messages in thread
From: Finn Thain @ 2022-04-30 7:48 UTC (permalink / raw)
To: Christophe JAILLET
Cc: Wan Jiabing, James Smart, Ram Vegesna, James E.J. Bottomley,
Martin K. Petersen, Daniel Wagner, linux-scsi, target-devel,
linux-kernel, cocci
[-- Attachment #1: Type: text/plain, Size: 490 bytes --]
On Sat, 30 Apr 2022, Christophe JAILLET wrote:
> Le 18/03/2022 à 15:52, Wan Jiabing a écrit :
> > io->sgl is allocated by kzalloc(). The memory is set to zero.
> > It is unnecessary to call memset again.
> >
>
> Hi,
>
> Nitpick: this kzalloc() should be a kcalloc() to avoid an open-coded
> multiplication when computing the size to allocate.
>
Seems like kcalloc() conversion could be a separate patch. Perhaps it
could be done everywhere using a coccinelle script.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
2022-04-30 7:48 ` [cocci] " Finn Thain
@ 2022-04-30 9:06 ` Christophe JAILLET
-1 siblings, 0 replies; 8+ messages in thread
From: Christophe JAILLET @ 2022-04-30 9:06 UTC (permalink / raw)
To: Finn Thain, Wan Jiabing
Cc: James Smart, Ram Vegesna, James E.J. Bottomley,
Martin K. Petersen, Daniel Wagner, linux-scsi, target-devel,
linux-kernel, cocci
Le 30/04/2022 à 09:48, Finn Thain a écrit :
> On Sat, 30 Apr 2022, Christophe JAILLET wrote:
>
>> Le 18/03/2022 à 15:52, Wan Jiabing a écrit :
>>> io->sgl is allocated by kzalloc(). The memory is set to zero.
>>> It is unnecessary to call memset again.
>>>
>>
>> Hi,
>>
>> Nitpick: this kzalloc() should be a kcalloc() to avoid an open-coded
>> multiplication when computing the size to allocate.
>>
>
> Seems like kcalloc() conversion could be a separate patch. Perhaps it
> could be done everywhere using a coccinelle script.
Sure it can and I guess that many coccinelle script already exist for it.
I only replied here because of a comment from Joe Perches on the same
patch a few month ago (see [1] and [2])
So Wan Jiabing or anyone else, if you want to go one step further, just
feel free to propose it.
CJ
[1]:
https://lore.kernel.org/all/4208b3d08a677601c73889f78dd25e5c9f056a86.camel@perches.com/
[2]:
https://lore.kernel.org/all/9be7d5beb437583f8d975d168ac5c3e32fb6e465.1639158677.git.christophe.jaillet@wanadoo.fr/
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [cocci] [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
@ 2022-04-30 9:06 ` Christophe JAILLET
0 siblings, 0 replies; 8+ messages in thread
From: Christophe JAILLET @ 2022-04-30 9:06 UTC (permalink / raw)
To: Finn Thain, Wan Jiabing
Cc: James Smart, Ram Vegesna, James E.J. Bottomley,
Martin K. Petersen, Daniel Wagner, linux-scsi, target-devel,
linux-kernel, cocci
Le 30/04/2022 à 09:48, Finn Thain a écrit :
> On Sat, 30 Apr 2022, Christophe JAILLET wrote:
>
>> Le 18/03/2022 à 15:52, Wan Jiabing a écrit :
>>> io->sgl is allocated by kzalloc(). The memory is set to zero.
>>> It is unnecessary to call memset again.
>>>
>>
>> Hi,
>>
>> Nitpick: this kzalloc() should be a kcalloc() to avoid an open-coded
>> multiplication when computing the size to allocate.
>>
>
> Seems like kcalloc() conversion could be a separate patch. Perhaps it
> could be done everywhere using a coccinelle script.
Sure it can and I guess that many coccinelle script already exist for it.
I only replied here because of a comment from Joe Perches on the same
patch a few month ago (see [1] and [2])
So Wan Jiabing or anyone else, if you want to go one step further, just
feel free to propose it.
CJ
[1]:
https://lore.kernel.org/all/4208b3d08a677601c73889f78dd25e5c9f056a86.camel@perches.com/
[2]:
https://lore.kernel.org/all/9be7d5beb437583f8d975d168ac5c3e32fb6e465.1639158677.git.christophe.jaillet@wanadoo.fr/
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io
2022-03-18 14:52 [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io Wan Jiabing
2022-04-30 6:29 ` Christophe JAILLET
@ 2022-05-03 0:51 ` Martin K. Petersen
1 sibling, 0 replies; 8+ messages in thread
From: Martin K. Petersen @ 2022-05-03 0:51 UTC (permalink / raw)
To: James E.J. Bottomley, Wan Jiabing, Ram Vegesna, linux-kernel,
James Smart, target-devel, Daniel Wagner, linux-scsi
Cc: Martin K . Petersen
On Fri, 18 Mar 2022 22:52:20 +0800, Wan Jiabing wrote:
> io->sgl is allocated by kzalloc(). The memory is set to zero.
> It is unnecessary to call memset again.
>
>
Applied to 5.19/scsi-queue, thanks!
[1/1] scsi: elx: efct: remove unnecessary memset in efct_io
https://git.kernel.org/mkp/scsi/c/507bd398a056
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2022-05-05 4:35 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-18 14:52 [PATCH] scsi: elx: efct: remove unnecessary memset in efct_io Wan Jiabing
2022-04-30 6:29 ` Christophe JAILLET
2022-04-30 6:29 ` Christophe JAILLET
2022-04-30 7:48 ` Finn Thain
2022-04-30 7:48 ` [cocci] " Finn Thain
2022-04-30 9:06 ` Christophe JAILLET
2022-04-30 9:06 ` [cocci] " Christophe JAILLET
2022-05-03 0:51 ` Martin K. Petersen
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