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kernfs: add CONFIG_KERNFS

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As sysfs was kernfs's only user, kernfs has been piggybacking on
CONFIG_SYSFS; however, kernfs is scheduled to grow a new user very
soon.  Introduce a separate config option CONFIG_KERNFS which is to be
selected by kernfs users.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tejun Heo
2014-02-03 14:09:17 -05:00
committed by Greg Kroah-Hartman
parent fa4cd451cc
commit ba341d55a4
5 changed files with 14 additions and 4 deletions
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1
fs/Kconfig
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@@ -96,6 +96,7 @@ endif # BLOCK
menu "Pseudo filesystems" menu "Pseudo filesystems"
source "fs/proc/Kconfig" source "fs/proc/Kconfig"
source "fs/kernfs/Kconfig"
source "fs/sysfs/Kconfig" source "fs/sysfs/Kconfig"
config TMPFS config TMPFS

3
fs/Makefile
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@@ -52,7 +52,8 @@ obj-$(CONFIG_FHANDLE) += fhandle.o
obj-y += quota/ obj-y += quota/
obj-$(CONFIG_PROC_FS) += proc/ obj-$(CONFIG_PROC_FS) += proc/
obj-$(CONFIG_SYSFS) += sysfs/ kernfs/ obj-$(CONFIG_KERNFS) += kernfs/
obj-$(CONFIG_SYSFS) += sysfs/
obj-$(CONFIG_CONFIGFS_FS) += configfs/ obj-$(CONFIG_CONFIGFS_FS) += configfs/
obj-y += devpts/ obj-y += devpts/

7
fs/kernfs/Kconfig Normal file
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@@ -0,0 +1,7 @@
#
# KERNFS should be selected by its users
#
config KERNFS
bool
default n

1
fs/sysfs/Kconfig
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@@ -1,6 +1,7 @@
config SYSFS config SYSFS
bool "sysfs file system support" if EXPERT bool "sysfs file system support" if EXPERT
default y default y
select KERNFS
help help
The sysfs filesystem is a virtual filesystem that the kernel uses to The sysfs filesystem is a virtual filesystem that the kernel uses to
export internal kernel objects, their attributes, and their export internal kernel objects, their attributes, and their

6
include/linux/kernfs.h
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@@ -201,7 +201,7 @@ struct kernfs_ops {
#endif #endif
}; };
#ifdef CONFIG_SYSFS #ifdef CONFIG_KERNFS
static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn) static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)
{ {
@@ -284,7 +284,7 @@ void kernfs_kill_sb(struct super_block *sb);
void kernfs_init(void); void kernfs_init(void);
#else /* CONFIG_SYSFS */ #else /* CONFIG_KERNFS */
static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn) static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)
{ return 0; } /* whatever */ { return 0; } /* whatever */
@@ -379,7 +379,7 @@ static inline void kernfs_kill_sb(struct super_block *sb) { }
static inline void kernfs_init(void) { } static inline void kernfs_init(void) { }
#endif /* CONFIG_SYSFS */ #endif /* CONFIG_KERNFS */
static inline struct kernfs_node * static inline struct kernfs_node *
kernfs_find_and_get(struct kernfs_node *kn, const char *name) kernfs_find_and_get(struct kernfs_node *kn, const char *name)