Create an ops field in /sys/slab/*/ops to contain all the callback
operations defined for a slab cache. This will be used to display
the additional callbacks that will be defined soon to enable
defragmentation.

Display the existing ctor callback in the ops fields contents.

Signed-off-by: Christoph Lameter <c...@linux.com>

---
 mm/slub.c |   16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

Index: linux/mm/slub.c
===================================================================
--- linux.orig/mm/slub.c
+++ linux/mm/slub.c
@@ -4994,13 +4994,18 @@ static ssize_t cpu_partial_store(struct
 }
 SLAB_ATTR(cpu_partial);
 
-static ssize_t ctor_show(struct kmem_cache *s, char *buf)
+static ssize_t ops_show(struct kmem_cache *s, char *buf)
 {
+       int x = 0;
+
        if (!s->ctor)
                return 0;
-       return sprintf(buf, "%pS\n", s->ctor);
+
+       if (s->ctor)
+               x += sprintf(buf + x, "ctor : %pS\n", s->ctor);
+       return x;
 }
-SLAB_ATTR_RO(ctor);
+SLAB_ATTR_RO(ops);
 
 static ssize_t aliases_show(struct kmem_cache *s, char *buf)
 {
@@ -5413,7 +5418,7 @@ static struct attribute *slab_attrs[] =
        &objects_partial_attr.attr,
        &partial_attr.attr,
        &cpu_slabs_attr.attr,
-       &ctor_attr.attr,
+       &ops_attr.attr,
        &aliases_attr.attr,
        &align_attr.attr,
        &hwcache_align_attr.attr,

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