From 158a962422e4a54dc256b6a9b9562f3d30d34d9c Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@woody.linux-foundation.org>
Date: Wed, 2 Jan 2008 13:04:48 -0800
Subject: [PATCH] Unify /proc/slabinfo configuration
Both SLUB and SLAB really did almost exactly the same thing for
/proc/slabinfo setup, using duplicate code and per-allocator #ifdef's.
This just creates a common CONFIG_SLABINFO that is enabled by both SLUB
and SLAB, and shares all the setup code. Maybe SLOB will want this some
day too.
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/proc/proc_misc.c | 21 ++-------------------
include/linux/slab.h | 5 +++++
include/linux/slab_def.h | 3 ---
include/linux/slub_def.h | 2 --
init/Kconfig | 6 ++++++
mm/slab.c | 2 +-
mm/slub.c | 11 +++++++++--
7 files changed, 23 insertions(+), 27 deletions(-)
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index a11968bc05161..3462bfde89f68 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -410,7 +410,7 @@ static const struct file_operations proc_modules_operations = {
};
#endif
-#ifdef CONFIG_SLAB
+#ifdef CONFIG_SLABINFO
static int slabinfo_open(struct inode *inode, struct file *file)
{
return seq_open(file, &slabinfo_op);
@@ -451,20 +451,6 @@ static const struct file_operations proc_slabstats_operations = {
#endif
#endif
-#ifdef CONFIG_SLUB
-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,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-#endif
-
static int show_stat(struct seq_file *p, void *v)
{
int i;
@@ -742,14 +728,11 @@ void __init proc_misc_init(void)
#endif
create_seq_entry("stat", 0, &proc_stat_operations);
create_seq_entry("interrupts", 0, &proc_interrupts_operations);
-#ifdef CONFIG_SLAB
+#ifdef CONFIG_SLABINFO
create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
#ifdef CONFIG_DEBUG_SLAB_LEAK
create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
#endif
-#endif
-#ifdef CONFIG_SLUB
- create_seq_entry("slabinfo", S_IWUSR|S_IRUGO, &proc_slabinfo_operations);
#endif
create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops);
diff --git a/include/linux/slab.h b/include/linux/slab.h
index f3a8eecd99f3c..f62caaad94e00 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -271,5 +271,10 @@ static inline void *kzalloc(size_t size, gfp_t flags)
return kmalloc(size, flags | __GFP_ZERO);
}
+#ifdef CONFIG_SLABINFO
+extern const struct seq_operations slabinfo_op;
+ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
+#endif
+
#endif /* __KERNEL__ */
#endif /* _LINUX_SLAB_H */
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index 32bdc2ffd7151..fcc48096ee640 100644
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -95,7 +95,4 @@ static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
#endif /* CONFIG_NUMA */
-extern const struct seq_operations slabinfo_op;
-ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
-
#endif /* _LINUX_SLAB_DEF_H */
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index b7d9408a00ff1..40801e754afb4 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -200,6 +200,4 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
}
#endif
-extern const struct seq_operations slabinfo_op;
-
#endif /* _LINUX_SLUB_DEF_H */
diff --git a/init/Kconfig b/init/Kconfig
index 404bbf3699bec..b9d11a899b886 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -658,6 +658,12 @@ endchoice
endmenu # General setup
+config SLABINFO
+ bool
+ depends on PROC_FS
+ depends on SLAB || SLUB
+ default y
+
config RT_MUTEXES
boolean
select PLIST
diff --git a/mm/slab.c b/mm/slab.c
index 2e338a5f7b14c..aebb9f68557a5 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -4105,7 +4105,7 @@ static void cache_reap(struct work_struct *w)
schedule_delayed_work(work, round_jiffies_relative(REAPTIMEOUT_CPUC));
}
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_SLABINFO
static void print_slabinfo_header(struct seq_file *m)
{
diff --git a/mm/slub.c b/mm/slub.c
index 903dabd92daf0..474945ecd89d8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4127,7 +4127,14 @@ __initcall(slab_sysfs_init);
/*
* The /proc/slabinfo ABI
*/
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_SLABINFO
+
+ssize_t slabinfo_write(struct file *file, const char __user * buffer,
+ size_t count, loff_t *ppos)
+{
+ return -EINVAL;
+}
+
static void print_slabinfo_header(struct seq_file *m)
{
@@ -4201,4 +4208,4 @@ const struct seq_operations slabinfo_op = {
.show = s_show,
};
-#endif /* CONFIG_PROC_FS */
+#endif /* CONFIG_SLABINFO */
--
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