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Message-ID: <84144f020810170555q655a977bx2c9a9501a214f3d6@mail.gmail.com>
Date: Fri, 17 Oct 2008 15:55:39 +0300
From: "Pekka Enberg" <penberg@...helsinki.fi>
To: "Alexey Dobriyan" <adobriyan@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
"Christoph Lameter" <cl@...ux-foundation.org>
Subject: Re: [PATCH 18/31] proc: move /proc/slab_allocators boilerplate to mm/slab.c
On Fri, Oct 17, 2008 at 3:48 PM, Alexey Dobriyan <adobriyan@...il.com> wrote:
> From 777d02988b44d1cc31b7cb6d82c94e4d337f5abe Mon Sep 17 00:00:00 2001
> From: Alexey Dobriyan <adobriyan@...il.com>
> Date: Mon, 6 Oct 2008 00:59:10 +0400
> Subject: [PATCH 18/31] proc: move /proc/slab_allocators boilerplate to mm/slab.c
>
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
Looks good to me.
Acked-by: Pekka Enberg <penberg@...helsinki.fi>
> ---
> fs/proc/proc_misc.c | 30 ------------------------------
> mm/slab.c | 36 +++++++++++++++++++++++++++++++++++-
> 2 files changed, 35 insertions(+), 31 deletions(-)
>
> diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
> index 1b46976..4fb05d1 100644
> --- a/fs/proc/proc_misc.c
> +++ b/fs/proc/proc_misc.c
> @@ -143,33 +143,6 @@ static const struct file_operations proc_slabinfo_operations = {
> .llseek = seq_lseek,
> .release = seq_release,
> };
> -
> -#ifdef CONFIG_DEBUG_SLAB_LEAK
> -extern 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;
> -}
> -
> -static const struct file_operations proc_slabstats_operations = {
> - .open = slabstats_open,
> - .read = seq_read,
> - .llseek = seq_lseek,
> - .release = seq_release_private,
> -};
> -#endif
> #endif
>
> #ifdef CONFIG_MMU
> @@ -337,9 +310,6 @@ void __init proc_misc_init(void)
> /* And now for trickier ones */
> #ifdef CONFIG_SLABINFO
> 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
> #endif
> #ifdef CONFIG_MMU
> proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations);
> diff --git a/mm/slab.c b/mm/slab.c
> index e76eee4..d53ac9c 100644
> --- a/mm/slab.c
> +++ b/mm/slab.c
> @@ -95,6 +95,7 @@
> #include <linux/init.h>
> #include <linux/compiler.h>
> #include <linux/cpuset.h>
> +#include <linux/proc_fs.h>
> #include <linux/seq_file.h>
> #include <linux/notifier.h>
> #include <linux/kallsyms.h>
> @@ -4443,13 +4444,46 @@ static int leaks_show(struct seq_file *m, void *p)
> return 0;
> }
>
> -const struct seq_operations slabstats_op = {
> +static const struct seq_operations slabstats_op = {
> .start = leaks_start,
> .next = s_next,
> .stop = s_stop,
> .show = leaks_show,
> };
> +
> +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;
> +}
> +
> +static const struct file_operations proc_slabstats_operations = {
> + .open = slabstats_open,
> + .read = seq_read,
> + .llseek = seq_lseek,
> + .release = seq_release_private,
> +};
> +#endif
> +
> +static int __init slab_proc_init(void)
> +{
> +#ifdef CONFIG_DEBUG_SLAB_LEAK
> + proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations);
> #endif
> + return 0;
> +}
> +module_init(slab_proc_init);
> #endif
>
> /**
> --
> 1.5.6.5
>
> --
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