Re: [PATCH] Reading deterministic cache parameters and exporting it in /sysfs

[Andrew Morton <akpm@osdl.org>]

Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> wrote:
>
>  The attached patch adds support for using cpuid(4) instead of cpuid(2), to get 
>  CPU cache information in a deterministic way for Intel CPUs, whenever 
>  supported.

- find_num_cache_leaves can be marked __init

- Please look for other __init opportunities.  That's quite a lot of code.

- Some functions have a space before the ( and some don't:

	+static ssize_t show_size (struct _cpuid4_info *this_leaf, char *buf)

  omitting the space is preferred.

- Don't cast the return value of kmalloc:

+	cpuid4_info[cpu] = (struct _cpuid4_info *)kmalloc(
+	    sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL);

- Sometimes there's a space after an `if', sometimes not.

+		if(cpuid4_info[i])

  a space is preferred.

- kfree(NULL) is permitted:

+	if(cpuid4_info[i])
+		kfree(cpuid4_info[i]);
+	if(cache_kobject[i])
+		kfree(cache_kobject[i]);
+	if(index_kobject[i])
+		kfree(index_kobject[i]);

  (in several places)


Once you've worked through the design issues with davej, please upissue the
patch, thanks.