The patch titled
Subject: mm/slab.c: use __seq_open_private() instead of seq_open()
has been added to the -mm tree. Its filename is
mm-use-__seq_open_private-instead-of-seq_open.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-use-__seq_open_private-instead-of-seq_open.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-use-__seq_open_private-instead-of-seq_open.patch
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------------------------------------------------------
From: Rob Jones <rob.jones@xxxxxxxxxxxxxxx>
Subject: mm/slab.c: use __seq_open_private() instead of seq_open()
Using __seq_open_private() removes boilerplate code from slabstats_open()
The resultant code is shorter and easier to follow.
This patch does not change any functionality.
Signed-off-by: Rob Jones <rob.jones@xxxxxxxxxxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slab.c | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)
diff -puN mm/slab.c~mm-use-__seq_open_private-instead-of-seq_open mm/slab.c
--- a/mm/slab.c~mm-use-__seq_open_private-instead-of-seq_open
+++ a/mm/slab.c
@@ -4248,19 +4248,15 @@ static const struct seq_operations slabs
static int slabstats_open(struct inode *inode, struct file *file)
{
- unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
- int ret = -ENOMEM;
- if (n) {
- ret = seq_open(file, &slabstats_op);
- if (!ret) {
- struct seq_file *m = file->private_data;
- *n = PAGE_SIZE / (2 * sizeof(unsigned long));
- m->private = n;
- n = NULL;
- }
- kfree(n);
- }
- return ret;
+ unsigned long *n;
+
+ n = __seq_open_private(file, &slabstats_op, PAGE_SIZE);
+ if (!n)
+ return -ENOMEM;
+
+ *n = PAGE_SIZE / (2 * sizeof(unsigned long));
+
+ return 0;
}
static const struct file_operations proc_slabstats_operations = {
_
Patches currently in -mm which might be from rob.jones@xxxxxxxxxxxxxxx are
ipc-use-__seq_open_private-instead-of-seq_open.patch
mm-use-seq_open_private-instead-of-seq_open.patch
mm-use-__seq_open_private-instead-of-seq_open.patch
lib-use-seq_open_private-instead-of-seq_open.patch
linux-next.patch
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