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Date: Tue, 16 Apr 2013 04:41:00 -0500
From: Robin Holt <holt@....com>
To: Joe Perches <joe@...ches.com>
Cc: Robin Holt <holt@....com>, Ingo Molnar <mingo@...hat.com>,
Russ Anderson <rja@....com>, Shawn Guo <shawn.guo@...aro.org>,
Oleg Nesterov <oleg@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"H. Peter Anvin" <hpa@...or.com>,
Lai Jiangshan <laijs@...fujitsu.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Michel Lespinasse <walken@...gle.com>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
"rusty@...tcorp.com.au" <rusty@...tcorp.com.au>,
Tejun Heo <tj@...nel.org>,
the arch/x86 maintainers <x86@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Patch -v3 3/4] checkpatch.pl the new kernel/reboot.c file.
On Mon, Apr 15, 2013 at 10:45:38AM -0700, Joe Perches wrote:
> On Mon, 2013-04-15 at 12:16 -0500, Robin Holt wrote:
> > I did allow the remaining 81 character line behind. It did not seem
> > like it was worth changing. Otherwise, it now passes checkpatch.pl.
>
> trivia:
>
> I'd make these changes on top of your patch:
>
> o Additional OOM messages aren't necessary as a dump_stack is done
I am not sure what I should be doing with this one. The only message
that seems close is the pr_warn("%s failed to allocate memory for...
but I don't see how dump_stack is getting invoked so I think either
you did not mean this message or you intended me to replace that with a
dump_stack, in which case, the error message would still be informative
and the dump_stack would be relatively useless.
> o Add pr_fmt to prefix logging messages with "reboot: "
Done. I did not see anything in the CodingStyle about this so I hope
I did it correctly. It will change some long-seen messages during
shutdown/reboot. Is that acceptable?
> o Remove periods from logging messages
Done. I read the CodingStyle guide's "Kernel messages do not have to
be terminated with a period." to mean they did not need to be removed.
I would not normally have touched them as I effectively moved them from
one file to another and I followed the guiding principal of do not mess
with somebody else's code style (especially Linus') unless necessary.
> o Argument alignment
Again, not sure what you want here. I kept the formatting fairly
consistent when I resolved the checkpatch.pl bits. I believe I only
changed the formatting on one if() statement. I had used tab followed
by space so I fixed that up in -v4.
> o Rename file prefix to "reboot.c"
I did fix up the comment which said sys.c. Is that what you were
asking for? If not, could you be more specific?
> o Add #include <linux/suspend.h> so it compiles
Done.
Thanks,
Robin
Subject: [Patch -v4 3/4] checkpatch.pl the new kernel/reboot.c file.
I did allow the remaining 81 character line behind. It did not seem
like it was worth changing. Otherwise, it now passes checkpatch.pl.
Signed-off-by: Robin Holt <holt@....com>
To: Ingo Molnar <mingo@...hat.com>
To: Russ Anderson <rja@....com>
Cc: Shawn Guo <shawn.guo@...aro.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Lai Jiangshan <laijs@...fujitsu.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc: Michel Lespinasse <walken@...gle.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Robin Holt <holt@....com>
Cc: "rusty@...tcorp.com.au" <rusty@...tcorp.com.au>
Cc: Tejun Heo <tj@...nel.org>
Cc: the arch/x86 maintainers <x86@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Joe Perches <joe@...ches.com>
---
Changes since -v3:
Integrated feedback from Joe Perches.
kernel/reboot.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/kernel/reboot.c b/kernel/reboot.c
index 907ab48..8cfef20 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -1,9 +1,11 @@
/*
- * linux/kernel/sys.c
+ * linux/kernel/reboot.c
*
* Copyright (C) 2013 Linus Torvalds
*/
+#define pr_fmt(fmt) "reboot: " fmt
+
#include <linux/export.h>
#include <linux/kexec.h>
#include <linux/kmod.h>
@@ -97,9 +99,9 @@ void kernel_restart(char *cmd)
migrate_to_reboot_cpu();
syscore_shutdown();
if (!cmd)
- printk(KERN_EMERG "Restarting system.\n");
+ pr_emerg("Restarting system\n");
else
- printk(KERN_EMERG "Restarting system with command '%s'.\n", cmd);
+ pr_emerg("Restarting system with command '%s'\n", cmd);
kmsg_dump(KMSG_DUMP_RESTART);
machine_restart(cmd);
}
@@ -108,7 +110,7 @@ EXPORT_SYMBOL_GPL(kernel_restart);
static void kernel_shutdown_prepare(enum system_states state)
{
blocking_notifier_call_chain(&reboot_notifier_list,
- (state == SYSTEM_HALT)?SYS_HALT:SYS_POWER_OFF, NULL);
+ (state == SYSTEM_HALT) ? SYS_HALT : SYS_POWER_OFF, NULL);
system_state = state;
usermodehelper_disable();
device_shutdown();
@@ -123,11 +125,10 @@ void kernel_halt(void)
kernel_shutdown_prepare(SYSTEM_HALT);
migrate_to_reboot_cpu();
syscore_shutdown();
- printk(KERN_EMERG "System halted.\n");
+ pr_emerg("System halted\n");
kmsg_dump(KMSG_DUMP_HALT);
machine_halt();
}
-
EXPORT_SYMBOL_GPL(kernel_halt);
/**
@@ -142,7 +143,7 @@ void kernel_power_off(void)
pm_power_off_prepare();
migrate_to_reboot_cpu();
syscore_shutdown();
- printk(KERN_EMERG "Power down.\n");
+ pr_emerg("Power down\n");
kmsg_dump(KMSG_DUMP_POWEROFF);
machine_power_off();
}
@@ -171,10 +172,10 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
/* For safety, we require "magic" arguments. */
if (magic1 != LINUX_REBOOT_MAGIC1 ||
- (magic2 != LINUX_REBOOT_MAGIC2 &&
- magic2 != LINUX_REBOOT_MAGIC2A &&
+ (magic2 != LINUX_REBOOT_MAGIC2 &&
+ magic2 != LINUX_REBOOT_MAGIC2A &&
magic2 != LINUX_REBOOT_MAGIC2B &&
- magic2 != LINUX_REBOOT_MAGIC2C))
+ magic2 != LINUX_REBOOT_MAGIC2C))
return -EINVAL;
/*
@@ -283,14 +284,13 @@ static int __orderly_poweroff(bool force)
ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
argv_free(argv);
} else {
- printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
- __func__, poweroff_cmd);
+ pr_warn("%s failed to allocate memory for \"%s\"\n",
+ __func__, poweroff_cmd);
ret = -ENOMEM;
}
if (ret && force) {
- printk(KERN_WARNING "Failed to start orderly shutdown: "
- "forcing the issue\n");
+ pr_warn("Failed to start orderly shutdown: forcing the issue\n");
/*
* I guess this should try to kick off some daemon to sync and
* poweroff asap. Or not even bother syncing if we're doing an
--
1.8.1.2
--
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