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mm/slab.c: use __seq_open_private() instead of seq_open()

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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@codethink.co.uk>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rob Jones 2014-10-09 15:28:03 -07:00 committed by Linus Torvalds
parent 703394c100
commit b208ce3292
1 changed files with 9 additions and 13 deletions
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22
mm/slab.c
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@ -4178,19 +4178,15 @@ static const struct seq_operations slabstats_op = {
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 = {