On 9/28/05, Deepak Joshi <deepak_cins@xxxxxxxxxxx> wrote: > HI all, > > I am trying to write at b0100000 of lcd control > register of strongarm. but its giving me "unable to > handle kernel paging request at virtual address > b0100000." > > i want to know why and in which conditions this error > is generated ? You're trying to write directly on the physical address. You should use the virtual address where the register is mapped to. Please see drivers/video/sa1100fb.c (and the definition of LCCR0 in include/asm-arm/arch-sa1100/SA-1100.h) Giancarlo -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/