proc: move /proc/slabinfo boilerplate to mm/slub.c, mm/slab.c

Lose dummy ->write hook in case of SLUB, it's possible now.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>

1 files changed, 15 insertions, 1 deletions

diff --git a/mm/slab.c b/mm/slab.c
index d53ac9c26ab7..09187517f9dc 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -4259,7 +4259,7 @@ static int s_show(struct seq_file *m, void *p)
  * + further values on SMP and with statistics enabled
  */
 
-const struct seq_operations slabinfo_op = {
+static const struct seq_operations slabinfo_op = {
         .start = s_start,
         .next = s_next,
         .stop = s_stop,
@@ -4316,6 +4316,19 @@ ssize_t slabinfo_write(struct file *file, const char __user * buffer,
         return res;
 }
 
+static int slabinfo_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &slabinfo_op);
+}
+
+static const struct file_operations proc_slabinfo_operations = {
+        .open           = slabinfo_open,
+        .read           = seq_read,
+        .write          = slabinfo_write,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
 #ifdef CONFIG_DEBUG_SLAB_LEAK
 
 static void *leaks_start(struct seq_file *m, loff_t *pos)
@@ -4478,6 +4491,7 @@ static const struct file_operations proc_slabstats_operations = {
 
 static int __init slab_proc_init(void)
 {
+        proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations);
 #ifdef CONFIG_DEBUG_SLAB_LEAK
         proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations);
 #endif