lkml.org 
[lkml]   [2009]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [tip:x86/cpu] x86: cacheinfo: replace sysfs interface for cache_disable feature

* Jaswinder Singh Rajput <jaswinder@kernel.org> wrote:

> On Mon, 2009-04-13 at 10:22 +0530, Jaswinder Singh Rajput wrote:
> > Hello Mark,
> >
> > On Fri, 2009-04-10 at 12:37 +0000, Mark Langsdorf wrote:
> > > Commit-ID: f8b201fc7110c3673437254e8ba02451461ece0b
> > > Gitweb: http://git.kernel.org/tip/f8b201fc7110c3673437254e8ba02451461ece0b
> > > Author: Mark Langsdorf <mark.langsdorf@amd.com>
> > > AuthorDate: Thu, 9 Apr 2009 15:18:49 +0200
> > > Committer: Ingo Molnar <mingo@elte.hu>
> > > CommitDate: Fri, 10 Apr 2009 14:21:53 +0200
> > >
> > > x86: cacheinfo: replace sysfs interface for cache_disable feature
> > >
> > > Impact: replace sysfs attribute
> > >
> > > Current interface violates against "one-value-per-sysfs-attribute
> > > rule". This patch replaces current attribute with two attributes --
> > > one for each L3 Cache Index Disable register.
> > >
> > > Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
> > > Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
> > > Cc: Andrew Morton <akpm@linux-foundation.org>
> > > LKML-Reference: <20090409131849.GJ31527@alberich.amd.com>
> > > Signed-off-by: Ingo Molnar <mingo@elte.hu>
> > >
> > >
> > > ---
> > > arch/x86/kernel/cpu/intel_cacheinfo.c | 90 ++++++++++++++++----------------
> > > 1 files changed, 45 insertions(+), 45 deletions(-)
> > >
> > > diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
> > > index 0cde071..fc28291 100644
> > > --- a/arch/x86/kernel/cpu/intel_cacheinfo.c
> > > +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
> > > @@ -697,73 +697,69 @@ static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf)
> > > #define to_object(k) container_of(k, struct _index_kobject, kobj)
> > > #define to_attr(a) container_of(a, struct _cache_attr, attr)
> > >
> > > -static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf)
> > > +static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
> > > + unsigned int index)
> > > {
> > > - const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
> > > - int node = cpu_to_node(cpumask_first(mask));
> > > - struct pci_dev *dev = NULL;
> > > - ssize_t ret = 0;
> > > - int i;
> > > + int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
> > > + int node = cpu_to_node(cpu);
> > > + struct pci_dev *dev = node_to_k8_nb_misc(node);
> > > + unsigned int reg = 0;
> >
> > This leads to compilation warnings:
> > CC arch/x86/kernel/cpu/intel_cacheinfo.o
> > arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘show_cache_disable’:
> > arch/x86/kernel/cpu/intel_cacheinfo.c:712: warning: unused variable ‘node’
> >
> > >
> > > -static ssize_t
> > > -store_cache_disable(struct _cpuid4_info *this_leaf, const char *buf,
> > > - size_t count)
> > > +static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
> > > + const char *buf, size_t count, unsigned int index)
> > > {
> > > - const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
> > > - int node = cpu_to_node(cpumask_first(mask));
> > > - struct pci_dev *dev = NULL;
> > > - unsigned int ret, index, val;
> > > + int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
> > > + int node = cpu_to_node(cpu);
> > > + struct pci_dev *dev = node_to_k8_nb_misc(node);
> > > + unsigned long val = 0;
> > >
> >
> > CC arch/x86/kernel/cpu/intel_cacheinfo.o
> > arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘store_cache_disable’:
> > arch/x86/kernel/cpu/intel_cacheinfo.c:737: warning: unused variable ‘cpu’
>
> Oops it is also pointing to node:
>
> arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘store_cache_disable’:
> arch/x86/kernel/cpu/intel_cacheinfo.c:739: warning: unused variable ‘node’

Mind sending a fix? We really dont want warnings noise in the x86
tree.

I was also thinking about adopting the Sparc trick: adding -Werror
to arch/x86/ files only, fixing all the fallout and ensuring no new
warnings from a flag day on. Anyone interested in doing that?

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

\
 
 \ /
  Last update: 2009-04-14 14:01    [W:0.126 / U:5.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site