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Date: Thu, 18 Jan 2007 11:33:29 +0100 From: Tomasz Chmielewski <mangoo@...g.org> To: "H. Peter Anvin" <hpa@...or.com> Cc: Jan Engelhardt <jengelh@...ux01.gwdg.de>, linux-kernel@...r.kernel.org Subject: Re: kernel cmdline: root=/dev/sdb1,/dev/sda1 "fallback"? H. Peter Anvin wrote: > Tomasz Chmielewski wrote: >> >> All right. >> I see that initramfs is attached to the kernel itself. >> >> So it leaves me only a question: will I fit all tools into 300 kB >> (considering I'll use uClibc and busybox)? >> > > You don't need to use busybox and have a bunch of tools. > > The klibc distribution comes with "kinit", which does the equivalent to > the kernel root-mounting code; it's in the tens of kilobytes, at least > on x86. If you're using ARM, you can compile it as Thumb. Hmm, I'm having problems compiling klibc-1.4 on ARM (using gcc-4.1.1): # make GEN klcc/klibc.config GEN klcc/klcc HOSTCC scripts/basic/fixdep GEN usr/klibc/syscalls/SYSCALLS.i GEN usr/klibc/syscalls/syscalls.nrs GEN usr/klibc/syscalls/typesize.c KLIBCCC usr/klibc/syscalls/typesize.o In file included from usr/klibc/../include/sys/poll.h:9, from usr/klibc/../include/poll.h:1, from usr/klibc/syscalls/syscommon.h:13, from usr/klibc/syscalls/typesize.c:1: usr/klibc/../include/sys/time.h:12: warning: 'struct timezone' declared inside parameter list usr/klibc/../include/sys/time.h:12: warning: 'struct timeval' declared inside parameter list usr/klibc/../include/sys/time.h:13: warning: 'struct timezone' declared inside parameter list usr/klibc/../include/sys/time.h:13: warning: 'struct timeval' declared inside parameter list usr/klibc/../include/sys/time.h:14: warning: 'struct itimerval' declared inside parameter list usr/klibc/../include/sys/time.h:15: warning: 'struct itimerval' declared inside parameter list usr/klibc/../include/sys/time.h:16: warning: 'struct timeval' declared inside parameter list In file included from usr/klibc/../include/poll.h:1, from usr/klibc/syscalls/syscommon.h:13, from usr/klibc/syscalls/typesize.c:1: usr/klibc/../include/sys/poll.h:18: warning: 'struct timespec' declared inside parameter list In file included from usr/klibc/../include/sys/resource.h:10, from usr/klibc/syscalls/syscommon.h:18, from usr/klibc/syscalls/typesize.c:1: /usr/include/linux/resource.h:24: error: field 'ru_utime' has incomplete type /usr/include/linux/resource.h:25: error: field 'ru_stime' has incomplete type In file included from usr/klibc/syscalls/syscommon.h:19, from usr/klibc/syscalls/typesize.c:1: usr/klibc/../include/sys/select.h:15: warning: 'struct timespec' declared inside parameter list In file included from usr/klibc/syscalls/syscommon.h:20, from usr/klibc/syscalls/typesize.c:1: usr/klibc/../include/sys/socket.h:47: warning: 'struct msghdr' declared inside parameter list usr/klibc/../include/sys/socket.h:48: warning: 'struct msghdr' declared inside parameter list In file included from usr/klibc/../include/sys/stat.h:11, from usr/klibc/syscalls/syscommon.h:21, from usr/klibc/syscalls/typesize.c:1: usr/include/arch/arm/klibc/archstat.h:33: error: field 'st_atim' has incomplete type usr/include/arch/arm/klibc/archstat.h:34: error: field 'st_mtim' has incomplete type usr/include/arch/arm/klibc/archstat.h:35: error: field 'st_ctim' has incomplete type In file included from usr/klibc/syscalls/syscommon.h:21, from usr/klibc/syscalls/typesize.c:1: usr/klibc/../include/sys/stat.h: In function 'mkfifo': usr/klibc/../include/sys/stat.h:30: error: 'S_IFMT' undeclared (first use in this function) usr/klibc/../include/sys/stat.h:30: error: (Each undeclared identifier is reported only once usr/klibc/../include/sys/stat.h:30: error: for each function it appears in.) usr/klibc/../include/sys/stat.h:30: error: 'S_IFIFO' undeclared (first use in this function) LIST usr/klibc/syscalls/syscalls.list GEN usr/klibc/socketcalls/SOCKETCALLS.i GEN usr/klibc/socketcalls/socketcalls.mk KLIBCCC usr/klibc/socketcalls/socket.o In file included from usr/klibc/../include/sys/stat.h:10, from usr/klibc/socketcalls/socketcommon.h:12, from usr/klibc/socketcalls/socket.c:1: usr/klibc/../include/sys/time.h:12: warning: 'struct timezone' declared inside parameter list usr/klibc/../include/sys/time.h:12: warning: 'struct timeval' declared inside parameter list usr/klibc/../include/sys/time.h:13: warning: 'struct timezone' declared inside parameter list usr/klibc/../include/sys/time.h:13: warning: 'struct timeval' declared inside parameter list usr/klibc/../include/sys/time.h:14: warning: 'struct itimerval' declared inside parameter list usr/klibc/../include/sys/time.h:15: warning: 'struct itimerval' declared inside parameter list usr/klibc/../include/sys/time.h:16: warning: 'struct timeval' declared inside parameter list In file included from usr/klibc/../include/sys/stat.h:11, from usr/klibc/socketcalls/socketcommon.h:12, from usr/klibc/socketcalls/socket.c:1: usr/include/arch/arm/klibc/archstat.h:33: error: field 'st_atim' has incomplete type usr/include/arch/arm/klibc/archstat.h:34: error: field 'st_mtim' has incomplete type usr/include/arch/arm/klibc/archstat.h:35: error: field 'st_ctim' has incomplete type In file included from usr/klibc/socketcalls/socketcommon.h:12, from usr/klibc/socketcalls/socket.c:1: usr/klibc/../include/sys/stat.h: In function 'mkfifo': usr/klibc/../include/sys/stat.h:30: error: 'S_IFMT' undeclared (first use in this function) usr/klibc/../include/sys/stat.h:30: error: (Each undeclared identifier is reported only once usr/klibc/../include/sys/stat.h:30: error: for each function it appears in.) usr/klibc/../include/sys/stat.h:30: error: 'S_IFIFO' undeclared (first use in this function) In file included from usr/klibc/socketcalls/socketcommon.h:14, from usr/klibc/socketcalls/socket.c:1: usr/klibc/../include/sys/socket.h: At top level: usr/klibc/../include/sys/socket.h:47: warning: 'struct msghdr' declared inside parameter list usr/klibc/../include/sys/socket.h:48: warning: 'struct msghdr' declared inside parameter list make[3]: *** [usr/klibc/socketcalls/socket.o] Error 1 make[2]: *** [usr/klibc/socketcalls] Error 2 make[1]: *** [all] Error 2 make: *** [klibc] Error 2 -- Tomasz Chmielewski - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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