x86: use %*pb[l] to print bitmaps including cpumasks and nodemasks

printk and friends can now format bitmaps using '%*pb[l]'.  cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.

* Unnecessary buffer size calculation and condition on the lenght
  removed from intel_cacheinfo.c::show_shared_cpu_map_func().

* uv_nmi_nr_cpus_pr() got overly smart and implemented "..."
  abbreviation if the output stretched over the predefined 1024 byte
  buffer.  Replaced with plain printk.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Mike Travis <travis@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 12 insertions, 14 deletions

diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index c7035073dfc1..659643376dbf 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -952,20 +952,18 @@ static ssize_t show_size(struct _cpuid4_info *this_leaf, char *buf,
 static ssize_t show_shared_cpu_map_func(struct _cpuid4_info *this_leaf,
                                         int type, char *buf)
 {
-        ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf;
-        int n = 0;
-
-        if (len > 1) {
-                const struct cpumask *mask;
-
-                mask = to_cpumask(this_leaf->shared_cpu_map);
-                n = type ?
-                        cpulist_scnprintf(buf, len-2, mask) :
-                        cpumask_scnprintf(buf, len-2, mask);
-                buf[n++] = '\n';
-                buf[n] = '\0';
-        }
-        return n;
+        const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
+        int ret;
+
+        if (type)
+                ret = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
+                                cpumask_pr_args(mask));
+        else
+                ret = scnprintf(buf, PAGE_SIZE - 1, "%*pb",
+                                cpumask_pr_args(mask));
+        buf[ret++] = '\n';
+        buf[ret] = '\0';
+        return ret;
 }
 
 static inline ssize_t show_shared_cpu_map(struct _cpuid4_info *leaf, char *buf,