From: Joe Perches <joe@perches.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Daniel Drake <dsd@gentoo.org>,
Ulrich Kunitz <kune@deine-taler.de>,
"John W. Linville" <linville@tuxdriver.com>,
linux-wireless@vger.kernel.org, netdev <netdev@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/4] zd1211rw: remove unnecessary [kv][mcz]alloc casts
Date: Sun, 28 Nov 2010 02:13:52 -0800 [thread overview]
Message-ID: <1290939232.16349.32.camel@Joe-Laptop> (raw)
In-Reply-To: <1290938527.3467.5.camel@jlt3.sipsolutions.net>
On Sun, 2010-11-28 at 11:02 +0100, Johannes Berg wrote:
> On Sun, 2010-11-28 at 01:50 -0800, Joe Perches wrote:
> > Good memory you have Johannes...
> > http://marc.info/?l=linux-netdev&m=117113743902549&w=3
> I, err, not really, all this isn't making a whole lot of sense to me
> right now :-)
> The only thing I remembered was that there was something weird with
> zd_addr_t ...
Yes. It's marked __nocast.
> Did sparse become more reliable in face of errors?
Apparently not.
If the kmalloc cast in zd_chip is removed:
$ make C=1 drivers/net/wireless/zd1211rw/zd_chip.o
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CALL scripts/checksyscalls.sh
CHECK drivers/net/wireless/zd1211rw/zd_chip.c
arch/x86/include/asm/uaccess_32.h:197:9: error: attribute 'error': unknown attribute
CC drivers/net/wireless/zd1211rw/zd_chip.o
$
If the __compiletime_<foo> uses in uaccess_32.h are removed,
and the kmalloc cast in zd_chip is also removed:
$ make C=1 drivers/net/wireless/zd1211rw/zd_chip.o
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CC arch/x86/kernel/asm-offsets.s
GEN include/generated/asm-offsets.h
CALL scripts/checksyscalls.sh
CHECK drivers/net/wireless/zd1211rw/zd_chip.c
drivers/net/wireless/zd1211rw/zd_chip.c:121:22: warning: implicit cast to nocast type
CC drivers/net/wireless/zd1211rw/zd_chip.o
$
WARNING: multiple messages have this Message-ID (diff)
From: Joe Perches <joe-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org>
To: Johannes Berg <johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>
Cc: Daniel Drake <dsd-aBrp7R+bbdUdnm+yROfE0A@public.gmane.org>,
Ulrich Kunitz <kune-hUSrv6EASfkEnNRfnnE9gw@public.gmane.org>,
"John W. Linville"
<linville-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org>,
linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
netdev <netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 4/4] zd1211rw: remove unnecessary [kv][mcz]alloc casts
Date: Sun, 28 Nov 2010 02:13:52 -0800 [thread overview]
Message-ID: <1290939232.16349.32.camel@Joe-Laptop> (raw)
In-Reply-To: <1290938527.3467.5.camel-8upI4CBIZJIJvtFkdXX2HixXY32XiHfO@public.gmane.org>
On Sun, 2010-11-28 at 11:02 +0100, Johannes Berg wrote:
> On Sun, 2010-11-28 at 01:50 -0800, Joe Perches wrote:
> > Good memory you have Johannes...
> > http://marc.info/?l=linux-netdev&m=117113743902549&w=3
> I, err, not really, all this isn't making a whole lot of sense to me
> right now :-)
> The only thing I remembered was that there was something weird with
> zd_addr_t ...
Yes. It's marked __nocast.
> Did sparse become more reliable in face of errors?
Apparently not.
If the kmalloc cast in zd_chip is removed:
$ make C=1 drivers/net/wireless/zd1211rw/zd_chip.o
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CALL scripts/checksyscalls.sh
CHECK drivers/net/wireless/zd1211rw/zd_chip.c
arch/x86/include/asm/uaccess_32.h:197:9: error: attribute 'error': unknown attribute
CC drivers/net/wireless/zd1211rw/zd_chip.o
$
If the __compiletime_<foo> uses in uaccess_32.h are removed,
and the kmalloc cast in zd_chip is also removed:
$ make C=1 drivers/net/wireless/zd1211rw/zd_chip.o
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CC arch/x86/kernel/asm-offsets.s
GEN include/generated/asm-offsets.h
CALL scripts/checksyscalls.sh
CHECK drivers/net/wireless/zd1211rw/zd_chip.c
drivers/net/wireless/zd1211rw/zd_chip.c:121:22: warning: implicit cast to nocast type
CC drivers/net/wireless/zd1211rw/zd_chip.o
$
--
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next prev parent reply other threads:[~2010-11-28 10:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-28 9:05 [PATCH 0/4] drivers/net: Remove unnecessary [kv][mcz]alloc casts Joe Perches
2010-11-28 9:05 ` [PATCH 1/4] netxen: remove " Joe Perches
2010-11-28 9:05 ` [PATCH 2/4] qlcnic: " Joe Perches
2010-11-28 9:05 ` [PATCH 3/4] vxge: " Joe Perches
2010-11-28 9:05 ` [PATCH 4/4] zd1211rw: " Joe Perches
2010-11-28 9:05 ` Joe Perches
2010-11-28 9:12 ` Johannes Berg
2010-11-28 9:20 ` Joe Perches
2010-11-28 9:30 ` Johannes Berg
2010-11-28 9:50 ` Joe Perches
2010-11-28 9:50 ` Joe Perches
2010-11-28 10:02 ` Johannes Berg
2010-11-28 10:13 ` Joe Perches [this message]
2010-11-28 10:13 ` Joe Perches
2010-11-28 10:02 ` [PATCH V2 4/4] zd1211rw: document need for kmalloc cast Joe Perches
2010-11-29 1:26 ` [PATCH 0/4] drivers/net: Remove unnecessary [kv][mcz]alloc casts David Miller
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