Initramfs and TMPFS!

[robotti@godmail.com]

   >It uses 50% of total memory for tmpfs, but it would be nice to have
   >an option (tmpfs_size=90% etc.) that you could pass to the kernel.
   >>that's just because of the tmpfs default; you can remount to change
   >>that if it's not suitable once your up and running in your
   >>init-scripts or whatever
   
Right, but it would be nice to have that option if initramfs
using tmpfs becomes part of the kernel.
   
   >You need to add this to init/main.c for it to compile.
   >#include <asm/uaccess.h>
   >>hmm... really? i'll rediff it at some point and test it maybe. i
   >>really don't like the explicity shm init though, i'd like to think of
   >>a cleaner way to do that

You get this error without it.   
   init/main.c: In function `overmount_rootfs':
init/main.c:663: warning: implicit declaration of function `get_fs'
init/main.c:663: error: incompatible types in assignment
init/main.c:664: warning: implicit declaration of function `set_fs'
init/main.c:664: error: `KERNEL_DS' undeclared (first use in this function)
init/main.c:664: error: (Each undeclared identifier is reported only once
init/main.c:664: error: for each function it appears in.)
make[1]: *** [init/main.o] Error 1
make: *** [init] Error 2