diff options
| -rw-r--r-- | drivers/base/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/base/devtmpfs.c | 5 | ||||
| -rw-r--r-- | fs/ramfs/inode.c | 2 | ||||
| -rw-r--r-- | include/linux/ramfs.h | 2 |
4 files changed, 13 insertions, 3 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index fd52c48ee762..ef38aff737eb 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -18,9 +18,9 @@ config UEVENT_HELPER_PATH config DEVTMPFS bool "Maintain a devtmpfs filesystem to mount at /dev" - depends on HOTPLUG && SHMEM && TMPFS + depends on HOTPLUG help - This creates a tmpfs filesystem instance early at bootup. + This creates a tmpfs/ramfs filesystem instance early at bootup. In this filesystem, the kernel driver core maintains device nodes with their default names and permissions for all registered devices with an assigned major/minor number. @@ -33,6 +33,9 @@ config DEVTMPFS functional /dev without any further help. It also allows simple rescue systems, and reliably handles dynamic major/minor numbers. + Notice: if CONFIG_TMPFS isn't enabled, the simpler ramfs + file system will be used instead. + config DEVTMPFS_MOUNT bool "Automount devtmpfs at /dev, after the kernel mounted the rootfs" depends on DEVTMPFS diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c index 057cf11326bf..af0600143d1c 100644 --- a/drivers/base/devtmpfs.c +++ b/drivers/base/devtmpfs.c @@ -20,6 +20,7 @@ #include <linux/namei.h> #include <linux/fs.h> #include <linux/shmem_fs.h> +#include <linux/ramfs.h> #include <linux/cred.h> #include <linux/sched.h> #include <linux/init_task.h> @@ -45,7 +46,11 @@ __setup("devtmpfs.mount=", mount_param); static int dev_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data, struct vfsmount *mnt) { +#ifdef CONFIG_TMPFS return get_sb_single(fs_type, flags, data, shmem_fill_super, mnt); +#else + return get_sb_single(fs_type, flags, data, ramfs_fill_super, mnt); +#endif } static struct file_system_type dev_fs_type = { diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index c94853473ca9..f47cd212dee1 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -214,7 +214,7 @@ static int ramfs_parse_options(char *data, struct ramfs_mount_opts *opts) return 0; } -static int ramfs_fill_super(struct super_block * sb, void * data, int silent) +int ramfs_fill_super(struct super_block *sb, void *data, int silent) { struct ramfs_fs_info *fsi; struct inode *inode = NULL; diff --git a/include/linux/ramfs.h b/include/linux/ramfs.h index 4e768dda87b0..8600508c77a6 100644 --- a/include/linux/ramfs.h +++ b/include/linux/ramfs.h @@ -20,4 +20,6 @@ extern const struct file_operations ramfs_file_operations; extern const struct vm_operations_struct generic_file_vm_ops; extern int __init init_rootfs(void); +int ramfs_fill_super(struct super_block *sb, void *data, int silent); + #endif |