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Message-ID: <20090919211552.GB6674@linux.vnet.ibm.com>
Date: Sat, 19 Sep 2009 14:15:52 -0700
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: Andy Whitcroft <apw@...onical.com>, linux-kernel@...r.kernel.org,
laijs@...fujitsu.com, dipankar@...ibm.com,
akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com,
tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
Valdis.Kletnieks@...edu
Subject: Re: [PATCH tip/core/rcu] RCU whitespace fixes
On Sat, Sep 19, 2009 at 09:05:52AM +0200, Ingo Molnar wrote:
>
> * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:
>
> > Fix a number of whitespace ^Ierrors in the include/linux/rcu* and the
> > kernel/rcu* files.
> >
> > Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> > ---
> >
> > include/linux/rculist_nulls.h | 2 +-
> > include/linux/rcupdate.h | 6 +++---
> > include/linux/rcutree.h | 2 +-
> > kernel/rcupdate.c | 4 ++--
> > kernel/rcutorture.c | 4 ++--
> > kernel/rcutree.c | 2 +-
> > kernel/rcutree.h | 2 +-
> > kernel/rcutree_plugin.h | 4 ++--
> > kernel/rcutree_trace.c | 2 +-
> > 9 files changed, 14 insertions(+), 14 deletions(-)
>
> thanks Paul - i also did a few more checkpatch trivial fixes to create a
> clean baseline.
Many thanks!!!
And I have added --patch to my "git format-patch script".
> Here's a full list of the remaining 'problems' in kernel/rcu*.[ch] files
> checked via checkpatch --file kernel/rcu*.[ch] , with annotations by me
> that suggest resolutions:
Thank you for looking this over -- I clearly need to get checkpatch
back into my workflow. :-/
I will resolve these after I finish getting rcutiny forward-ported and
shrunk a bit further. The rcutiny work is critically needed to repair
a rent in the space-time continuum... :-)
Thanx, Paul
> [ Andy: see one checkpatch bug mentioned below. Plus it would be
> _really_ nice if line 80 warnings would only be emitted if the line
> also contains 2 or more tabs - i.e. excessive nesting. Longer than 100
> lines should be warned about unconditionally. ]
>
> -----------------------
> WARNING: externs should be avoided in .c files
> #262: FILE: rcupdate.c:262:
> +extern int rcu_cpu_notify(struct notifier_block *self,
>
> -----------------------> Move rcu_cpu_notify() prototype to rcutree.h?
>
> WARNING: line over 80 characters
> #87: FILE: rcutorture.c:87:
> + do { printk(KERN_ALERT "%s" TORTURE_FLAG s "\n", torture_type); } while (0)
>
> -----------------------> Ignore.
>
> WARNING: line over 80 characters
> #89: FILE: rcutorture.c:89:
> + do { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG s "\n", torture_type); } while (0)
>
> -----------------------> Ignore.
>
> WARNING: line over 80 characters
> #91: FILE: rcutorture.c:91:
> + do { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "!!! " s "\n", torture_type); } while (0)
>
> -----------------------> Ignore.
>
> WARNING: line over 80 characters
> #247: FILE: rcutorture.c:247:
> + schedule_timeout_interruptible(round_jiffies_relative(HZ));
>
> -----------------------> Ignore.
>
> WARNING: externs should be avoided in .c files
> #609: FILE: rcutorture.c:609:
> +extern int rcu_expedited_torture_stats(char *page);
>
> -----------------------> Move rcu_expedited_torture_stats() prototype to sched.h?
>
> CHECK: memory barrier without comment
> #653: FILE: rcutorture.c:653:
> + smp_wmb();
>
> -----------------------> Add comment?
>
> WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable
> #56: FILE: rcutree.c:56:
> +EXPORT_SYMBOL_GPL(rcu_lock_map);
>
> -----------------------> checkpatch.pl bug?
>
> WARNING: externs should be avoided in .c files
> #84: FILE: rcutree.c:84:
> +extern long rcu_batches_completed_sched(void);
>
> -----------------------> Move rcu_batches_completed_sched() to sched.h?
>
> WARNING: usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc
> #1498: FILE: rcutree.c:1498:
> + cprv = NR_CPUS;
>
> -----------------------> Ignore.
>
> WARNING: usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc
> #1535: FILE: rcutree.c:1535:
> + if (rnp->grphi >= NR_CPUS)
>
> -----------------------> Ignore.
>
> WARNING: usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc
> #1536: FILE: rcutree.c:1536:
> + rnp->grphi = NR_CPUS - 1;
>
> -----------------------> Ignore.
>
> WARNING: usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc
> #48: FILE: rcutree.h:48:
> +#elif NR_CPUS <= RCU_FANOUT_SQ
>
> -----------------------> Ignore.
>
> WARNING: usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc
> #54: FILE: rcutree.h:54:
> +#elif NR_CPUS <= RCU_FANOUT_CUBE
>
> -----------------------> Ignore.
>
> CHECK: spinlock_t definition without comment
> #82: FILE: rcutree.h:82:
> + spinlock_t lock;
>
> -----------------------> Add comment?
>
> WARNING: struct file_operations should normally be const
> #96: FILE: rcutree_trace.c:96:
> +static struct file_operations rcudata_fops = {
>
> -----------------------> Add const?
>
> WARNING: struct file_operations should normally be const
> #148: FILE: rcutree_trace.c:148:
> +static struct file_operations rcudata_csv_fops = {
>
> -----------------------> Add const?
>
> ERROR: code indent should use tabs where possible
> #162: FILE: rcutree_trace.c:162:
> +^I "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu\n",$
>
> -----------------------> s/ /^T/
>
> WARNING: struct file_operations should normally be const
> #199: FILE: rcutree_trace.c:199:
> +static struct file_operations rcuhier_fops = {
>
> -----------------------> Add const?
>
> WARNING: struct file_operations should normally be const
> #225: FILE: rcutree_trace.c:225:
> +static struct file_operations rcugp_fops = {
>
> -----------------------> Add const?
>
> WARNING: struct file_operations should normally be const
> #279: FILE: rcutree_trace.c:279:
> +static struct file_operations rcu_pending_fops = {
>
> -----------------------> Add const?
>
> Thanks,
>
> Ingo
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