2.5.9-dj1 sd_init() fails at boot

With both lk 2.5.8-dj1 and lk 2.5.9-dj1 the scsi disk driver (sd) fails in sd_init() with OOM causing the scsi disk holding my root fs not to be found. The kmalloc(,GFP_ATOMIC) for the array of "struct hd_struct" returns NULL. Strange that my Athlon 1.2 GHz box with 512 MB of ram should get an OOM error at that point.

Pete Zaitcev came across similar problems in the 2.4 series which he has addressed by changing the kmalloc() to vmalloc().

Rather than a minimal patch, the attachment uses vmalloc() and does a cleanup of the sd driver that was presented in an earlier post:
http://marc.theaimsgroup.com/?l=linux-scsi&m=101798201714399&w=2
As noted in that post, the attachment also fixes an oops resulting from this sequence (when sd is a module):

 $ modprobe sd_mod; rmmod sd_mod; modprobe sd_mod

Doug Gilbert