Re: [PATCH 04/18] ARM: at91: make ST (System Timer) soc independent

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On 14:48 Mon 20 Feb     , Ryan Mallon wrote:
> On 20/02/12 14:23, Jean-Christophe PLAGNIOL-VILLARD wrote:
> 
> > On 14:16 Mon 20 Feb     , Ryan Mallon wrote:
> >> On 20/02/12 14:02, Jean-Christophe PLAGNIOL-VILLARD wrote:
> >>
> >>> On 12:52 Mon 20 Feb     , Ryan Mallon wrote:
> >>>> On 20/02/12 12:38, Jean-Christophe PLAGNIOL-VILLARD wrote:
> >>>>
> >>>>> On 11:22 Mon 20 Feb     , Ryan Mallon wrote:
> >>>>>> On 18/02/12 04:49, Nicolas Ferre wrote:
> >>>>>>
> >>>>>>> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
> >>>>>>>
> >>>>>>> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
> >>>>>>> Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
> >>>>>>> ---
> >>>>>>>  arch/arm/mach-at91/at91rm9200.c              |    4 +-
> >>>>>>>  arch/arm/mach-at91/at91rm9200_time.c         |   37 ++++++++++++++++----------
> >>>>>>>  arch/arm/mach-at91/generic.h                 |    1 +
> >>>>>>>  arch/arm/mach-at91/include/mach/at91_st.h    |   32 +++++++++++++++-------
> >>>>>>>  arch/arm/mach-at91/include/mach/at91rm9200.h |    2 +-
> >>>>>>>  drivers/watchdog/at91rm9200_wdt.c            |    8 +++---
> >>>>>>>  6 files changed, 53 insertions(+), 31 deletions(-)
> >>>>>>>
> >>>>>>> diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
> >>>>>>
> >>>>>> Hi Jean, Nicolas,
> >>>>>>
> >>>>>> Patch looks mostly good, couple of points below.
> >>>>>>
> >>>>>> ~Ryan
> >>>>>>
> >>>>>> <snip>
> >>>>>>
> >>>>>>>  	/* Cancel any pending alarm; flush any pending IRQ */
> >>>>>>> -	at91_sys_write(AT91_ST_RTAR, alm);
> >>>>>>> -	(void) at91_sys_read(AT91_ST_SR);
> >>>>>>> +	at91_st_write(AT91_ST_RTAR, alm);
> >>>>>>> +	(void) at91_st_read(AT91_ST_SR);
> >>>>>>
> >>>>>>
> >>>>>> Can we please remove the (void) casting of the return value when making
> >>>>>> this change, especially since at91_st_read is now a macro which doesn't
> >>>>>> even have a return value. Same in a few other places.
> >>>>> modification done by script and it's no the scope of this patch
> >>>>
> >>>>
> >>>> That isn't an excuse to leave incorrect code there. It is a simple fix.
> >>> no (void) in c means you don't care of the return so basically it's right
> >>
> >>
> >> Because of the way the __raw_writel is defined you are casting the
> >> result of an assignment, basically you are doing this:
> >>
> >>    int foo, bar;
> >>
> >>   (void)(foo = bar);
> >>
> >> Which is pointless. Don't make excuses for silly, redundant code. Fix
> >> it, please.
> > except it's a read it has nothing to do with that
> 
> 
> It makes no difference, it is still equally pointless. We don't cast
> unused return values to void, for functions or assignments, in the kernel.
> 
> It is pointless, superfluous code, and now is a really good opportunity
> to fix it. You can probably even make your script do it for you :-).
I do not want to do 2 thinks at the same time
[
if there is a need to o fix this, it must be done in other patch bisectable

Best Regards,
J.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/


[Other Archives]     [Linux Kernel Newbies]     [Linux Driver Development]     [Fedora Kernel]     [Linux Kernel Testers]     [Linux SH]     [Linux Omap]     [Linux Kbuild]     [Linux Tape]     [Linux Input]     [Linux Kernel Janitors]     [Linux Kernel Packagers]     [Linux Doc]     [Linux Man Pages]     [Linux API]     [Linux Memory Management]     [Linux Modules]     [Linux Standards]     [Kernel Announce]     [Netdev]     [Git]     [Linux PCI]     Linux CAN Development     [Linux I2C]     [Linux RDMA]     [Linux NUMA]     [Netfilter]     [Netfilter Devel]     [SELinux]     [Bugtraq]     [FIO]     [Linux Perf Users]     [Linux Serial]     [Linux PPP]     [Linux ISDN]     [Linux Next]     [Kernel Stable Commits]     [Linux Tip Commits]     [Kernel MM Commits]     [Linux Security Module]     [Filesystem Development]     [Ext3 Filesystem]     [Linux bcache]     [Ext4 Filesystem]     [Linux BTRFS]     [Linux CEPH Filesystem]     [Linux XFS]     [XFS]     [Linux NFS]     [Linux CIFS]     [Ecryptfs]     [Linux NILFS]     [Linux Cachefs]     [Reiser FS]     [Initramfs]     [Linux FB Devel]     [Linux OpenGL]     [DRI Devel]     [Fastboot]     [Linux RT Users]     [Linux RT Stable]     [eCos]     [Corosync]     [Linux Clusters]     [LVS Devel]     [Hot Plug]     [Linux Virtualization]     [KVM]     [KVM PPC]     [KVM ia64]     [Linux Containers]     [Linux Hexagon]     [Linux Cgroups]     [Util Linux]     [Wireless]     [Linux Bluetooth]     [Bluez Devel]     [Ethernet Bridging]     [Embedded Linux]     [Barebox]     [Linux MMC]     [Linux IIO]     [Sparse]     [Smatch]     [Linux Arch]     [x86 Platform Driver]     [Linux ACPI]     [Linux IBM ACPI]     [LM Sensors]     [CPU Freq]     [Linux Power Management]     [Linmodems]     [Linux DCCP]     [Linux SCTP]     [ALSA Devel]     [Linux USB]     [Linux PA RISC]     [Linux Samsung SOC]     [MIPS Linux]     [IBM S/390 Linux]     [ARM Linux]     [ARM Kernel]     [ARM MSM]     [Tegra Devel]     [Sparc Linux]     [Linux Security]     [Linux Sound]     [Linux Media]     [Video 4 Linux]     [Linux IRDA Users]     [Linux for the blind]     [Linux RAID]     [Linux ATA RAID]     [Device Mapper]     [Linux SCSI]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Linux IDE]     [Linux SMP]     [Linux AXP]     [Linux Alpha]     [Linux M68K]     [Linux ia64]     [Linux 8086]     [Linux x86_64]     [Linux Config]     [Linux Apps]     [Linux MSDOS]     [Linux X.25]     [Linux Crypto]     [DM Crypt]     [Linux Trace Users]     [Linux Btrace]     [Linux Watchdog]     [Utrace Devel]     [Linux C Programming]     [Linux Assembly]     [Dash]     [DWARVES]     [Hail Devel]     [Linux Kernel Debugger]     [Linux gcc]     [Gcc Help]     [X.Org]     [Wine]

Add to Google Powered by Linux

[Older Kernel Discussion]     [Yosemite National Park Forum]     [Large Format Photos]     [Gimp]     [Yosemite Photos]     [Stuff]