[PATCH] Make udev/udevstart be one binary

Hi,

The following patch makes udev/udevstart be a common binary.  First,
doing this grows udev by a total of 1.8kB (ppc32, stripped) whereas
udevstart by itself is 6.4kB.  I know you mentioned being able to
replace udevstart with a script, but at 1.8kB I don't think it'll be
easy to beat this with size there.  Next, the following are by-eye
timings of before, after, and with devfs on a slow, but still usable
embedded platform (config stripped down to more-or-less bare for
ramdisk):
-- Embedded Planet RPX LITE, 64Mhz MPC 823e --
devfs         : 15.333s, 15.253s, 14.988s (15.191s avg)
udev-pristine : 18.675s, 18.079s, 18.418s (18.390s avg)
udev-multi    : 14.587s, 14.747s, 14.868s (14.734s avg)

The patch ends up being rather large to add this, as in doing so I ended
up making all refs (that I hit..) to devpath/subsystem be marked as
'const'.


Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/udev.h b/udev.h
index da02e26bba..310154f55d 100644
--- a/udev.h
+++ b/udev.h
@@ -61,11 +61,15 @@ struct udevice {
 	char kernel_name[NAME_SIZE];
 };
 
-extern int udev_add_device(char *path, char *subsystem, int fake);
-extern int udev_remove_device(char *path, char *subsystem);
+extern int udev_add_device(const char *path, const char *subsystem, int fake);
+extern int udev_remove_device(const char *path, const char *subsystem);
 extern void udev_init_config(void);
+extern int udev_start(void);
+extern int __udev_hotplug(char *action, const char *devpath,
+	const char *subsystem);
 extern int parse_get_pair(char **orig_string, char **left, char **right);
-extern void dev_d_send(struct udevice *dev, char *subsystem, char *devpath);
+extern void dev_d_send(struct udevice *dev, const char *subsystem,
+	const char *devpath);
 
 extern char **main_argv;
 extern char **main_envp;