I tracked down a regression in PCMCIA (and other software) to a new bogus register_chrdev() behavior that got merged last month; a patch from Matt Mackall that misbehaves.
This patch just reverts Matt's, restoring the previous behavior but at the cost of about a Kbyte of static memory on 32bit CPUs. Someday a Real Fix(tm) would be good. - Dave
This reverts a fs/char_dev.c patch that was merged into BK on March 3. The problem is that it breaks things ... __register_chrdev_region() has a block of code, commented "temporary" for over two years now, which fails rudely during PCMCIA initialization or other register_chrdev() calls, because it doesn't "degrade to linked list". This keeps whole subsystems from working. A real fix to that "temporary" code should be possible, using some better scheme to allocate major numbers, but it's not something I want to spend time on just now. Signed-off-by: David Brownell <[EMAIL PROTECTED]> --- 1.38/fs/char_dev.c 2005-03-09 09:03:28 -08:00 +++ edited/fs/char_dev.c 2005-04-17 08:45:19 -07:00 @@ -26,8 +26,7 @@ static struct kobj_map *cdev_map; -/* degrade to linked list for small systems */ -#define MAX_PROBE_HASH (CONFIG_BASE_SMALL ? 1 : 255) +#define MAX_PROBE_HASH 255 /* random */ static DECLARE_MUTEX(chrdevs_lock);
