How's this one :-)
This patch does:
introduces CONFIG_COMPAT32
introduces linux/compat32.h - which contains only struct timespec32
for now
creates an architecture independent version of sys32_nanosleep
in kernel/timer.c
I make the follwing assumptions:
returning s32 from a 32 bit compatibility system call is the same
as returning long or int.
int == s32 on all 64 bit architectures
How does this look? Should timespec32 be called compat32_timespec?
Should the new do_nanosleep function be inlined?
This patch has not even been compiled. Please have a look and comment.
-- Cheers, Stephen Rothwell sfr@canb.auug.org.au http://www.canb.auug.org.au/~sfr/diff -ruN 2.5.49/arch/ia64/Kconfig 2.5.49-32bit.2/arch/ia64/Kconfig --- 2.5.49/arch/ia64/Kconfig 2002-11-18 15:47:40.000000000 +1100 +++ 2.5.49-32bit.2/arch/ia64/Kconfig 2002-11-27 18:06:58.000000000 +1100 @@ -397,6 +397,11 @@ run IA-32 Linux binaries on an IA-64 Linux system. If in doubt, say Y. +config COMPAT32 + bool + depends on IA32_SUPPORT + default y + config PERFMON bool "Performance monitor support" help diff -ruN 2.5.49/arch/ia64/ia32/ia32_signal.c 2.5.49-32bit.2/arch/ia64/ia32/ia32_signal.c --- 2.5.49/arch/ia64/ia32/ia32_signal.c 2002-10-31 14:05:10.000000000 +1100 +++ 2.5.49-32bit.2/arch/ia64/ia32/ia32_signal.c 2002-11-27 18:06:58.000000000 +1100 @@ -22,6 +22,7 @@ #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/wait.h> +#include <linux/compat32.h> #include <asm/uaccess.h> #include <asm/rse.h> diff -ruN 2.5.49/arch/ia64/ia32/sys_ia32.c 2.5.49-32bit.2/arch/ia64/ia32/sys_ia32.c --- 2.5.49/arch/ia64/ia32/sys_ia32.c 2002-11-18 15:47:40.000000000 +1100 +++ 2.5.49-32bit.2/arch/ia64/ia32/sys_ia32.c 2002-11-27 18:06:58.000000000 +1100 @@ -49,6 +49,7 @@ #include <linux/ptrace.h> #include <linux/stat.h> #include <linux/ipc.h> +#include <linux/compat32.h> #include <asm/types.h> #include <asm/uaccess.h> @@ -1113,27 +1114,6 @@ (struct timeval32 *) A(a.tvp)); } -extern asmlinkage long sys_nanosleep (struct timespec *rqtp, struct timespec *rmtp); - -asmlinkage long -sys32_nanosleep (struct timespec32 *rqtp, struct timespec32 *rmtp) -{ - struct timespec t; - int ret; - mm_segment_t old_fs = get_fs(); - - if (get_user (t.tv_sec, &rqtp->tv_sec) || get_user (t.tv_nsec, &rqtp->tv_nsec)) - return -EFAULT; - set_fs(KERNEL_DS); - ret = sys_nanosleep(&t, rmtp ? &t : NULL); - set_fs(old_fs); - if (rmtp && ret == -EINTR) { - if (put_user(t.tv_sec, &rmtp->tv_sec) || put_user(t.tv_nsec, &rmtp->tv_nsec)) - return -EFAULT; - } - return ret; -} - struct iovec32 { unsigned int iov_base; int iov_len; }; asmlinkage ssize_t sys_readv (unsigned long,const struct iovec *,unsigned long); asmlinkage ssize_t sys_writev (unsigned long,const struct iovec *,unsigned long); diff -ruN 2.5.49/arch/mips64/Kconfig 2.5.49-32bit.2/arch/mips64/Kconfig --- 2.5.49/arch/mips64/Kconfig 2002-11-18 15:47:40.000000000 +1100 +++ 2.5.49-32bit.2/arch/mips64/Kconfig 2002-11-27 18:06:58.000000000 +1100 @@ -371,6 +371,11 @@ compatibility. Since all software available for Linux/MIPS is currently 32-bit you should say Y here. +config COMPAT32 + bool + depends on MIPS32_COMPAT + default y + config BINFMT_ELF32 bool depends on MIPS32_COMPAT diff -ruN 2.5.49/arch/mips64/kernel/linux32.c 2.5.49-32bit.2/arch/mips64/kernel/linux32.c --- 2.5.49/arch/mips64/kernel/linux32.c 2002-10-21 01:02:44.000000000 +1000 +++ 2.5.49-32bit.2/arch/mips64/kernel/linux32.c 2002-11-27 18:06:58.000000000 +1100 @@ -27,6 +27,7 @@ #include <linux/personality.h> #include <linux/timex.h> #include <linux/dnotify.h> +#include <linux/compat32.h> #include <net/sock.h> #include <asm/uaccess.h> @@ -1205,11 +1206,6 @@ -struct timespec32 { - int tv_sec; - int tv_nsec; -}; - extern asmlinkage int sys_sched_rr_get_interval(pid_t pid, struct timespec *interval); @@ -1230,31 +1226,6 @@ } -extern asmlinkage int sys_nanosleep(struct timespec *rqtp, - struct timespec *rmtp); - -asmlinkage int -sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp) -{ - struct timespec t; - int ret; - mm_segment_t old_fs = get_fs (); - - if (get_user (t.tv_sec, &rqtp->tv_sec) || - __get_user (t.tv_nsec, &rqtp->tv_nsec)) - return -EFAULT; - - set_fs (KERNEL_DS); - ret = sys_nanosleep(&t, rmtp ? &t : NULL); - set_fs (old_fs); - if (rmtp && ret == -EINTR) { - if (__put_user (t.tv_sec, &rmtp->tv_sec) || - __put_user (t.tv_nsec, &rmtp->tv_nsec)) - return -EFAULT; - } - return ret; -} - struct tms32 { int tms_utime; int tms_stime; diff -ruN 2.5.49/arch/parisc/Kconfig 2.5.49-32bit.2/arch/parisc/Kconfig --- 2.5.49/arch/parisc/Kconfig 2002-11-18 15:47:40.000000000 +1100 +++ 2.5.49-32bit.2/arch/parisc/Kconfig 2002-11-27 18:06:58.000000000 +1100 @@ -107,6 +107,11 @@ enable this option otherwise. The 64bit kernel is significantly bigger and slower than the 32bit one. +config COMPAT32 + bool + depends PARISC64 + default y + config PDC_NARROW bool "32-bit firmware" depends on PARISC64 diff -ruN 2.5.49/arch/parisc/kernel/sys_parisc32.c 2.5.49-32bit.2/arch/parisc/kernel/sys_parisc32.c --- 2.5.49/arch/parisc/kernel/sys_parisc32.c 2002-11-18 15:47:40.000000000 +1100 +++ 2.5.49-32bit.2/arch/parisc/kernel/sys_parisc32.c 2002-11-27 18:06:58.000000000 +1100 @@ -52,6 +52,7 @@ #include <linux/mman.h> #include <linux/binfmts.h> #include <linux/namei.h> +#include <linux/compat32.h> #include <asm/types.h> #include <asm/uaccess.h> @@ -584,11 +585,6 @@ } #endif /* CONFIG_SYSCTL */ -struct timespec32 { - s32 tv_sec; - s32 tv_nsec; -}; - static int put_timespec32(struct timespec32 *u, struct timespec *t) { @@ -598,28 +594,6 @@ return copy_to_user(u, &t32, sizeof t32); } -asmlinkage int sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp) -{ - struct timespec t; - struct timespec32 t32; - int ret; - extern asmlinkage int sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp); - - if (copy_from_user(&t32, rqtp, sizeof t32)) - return -EFAULT; - t.tv_sec = t32.tv_sec; - t.tv_nsec = t32.tv_nsec; - - DBG(("sys32_nanosleep({%d, %d})\n", t32.tv_sec, t32.tv_nsec)); - - KERNEL_SYSCALL(ret, sys_nanosleep, &t, rmtp ? &t : NULL); - if (rmtp && ret == -EINTR) { - if (put_timespec32(rmtp, &t)) - return -EFAULT; - } - return ret; -} - asmlinkage long sys32_sched_rr_get_interval(pid_t pid, struct timespec32 *interval) { diff -ruN 2.5.49/arch/ppc64/Kconfig 2.5.49-32bit.2/arch/ppc64/Kconfig --- 2.5.49/arch/ppc64/Kconfig 2002-11-18 15:47:40.000000000 +1100 +++ 2.5.49-32bit.2/arch/ppc64/Kconfig 2002-11-27 18:06:58.000000000 +1100 @@ -33,6 +33,10 @@ bool default y +config COMPAT32 + bool + default y + source "init/Kconfig" diff -ruN 2.5.49/arch/ppc64/kernel/signal32.c 2.5.49-32bit.2/arch/ppc64/kernel/signal32.c --- 2.5.49/arch/ppc64/kernel/signal32.c 2002-10-21 01:02:45.000000000 +1000 +++ 2.5.49-32bit.2/arch/ppc64/kernel/signal32.c 2002-11-27 18:06:58.000000000 +1100 @@ -22,6 +22,7 @@ #include <linux/signal.h> #include <linux/errno.h> #include <linux/elf.h> +#include <linux/compat32.h> #include <asm/ppc32.h> #include <asm/uaccess.h> #include <asm/ppcdebug.h> @@ -53,11 +54,6 @@ #define MSR_USERCHANGE 0 #endif -struct timespec32 { - s32 tv_sec; - s32 tv_nsec; -}; - struct sigregs32 { /* * the gp_regs array is 32 bit representation of the pt_regs diff -ruN 2.5.49/arch/ppc64/kernel/sys_ppc32.c 2.5.49-32bit.2/arch/ppc64/kernel/sys_ppc32.c --- 2.5.49/arch/ppc64/kernel/sys_ppc32.c 2002-10-21 01:02:45.000000000 +1000 +++ 2.5.49-32bit.2/arch/ppc64/kernel/sys_ppc32.c 2002-11-27 18:06:58.000000000 +1100 @@ -53,6 +53,7 @@ #include <linux/mman.h> #include <linux/sysctl.h> #include <linux/binfmts.h> +#include <linux/compat32.h> #include <asm/types.h> #include <asm/ipc.h> @@ -1774,37 +1775,6 @@ -struct timespec32 { - s32 tv_sec; - s32 tv_nsec; -}; - -extern asmlinkage long sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp); - -asmlinkage long sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp) -{ - struct timespec t; - int ret; - mm_segment_t old_fs = get_fs (); - - if (get_user (t.tv_sec, &rqtp->tv_sec) || - __get_user (t.tv_nsec, &rqtp->tv_nsec)) - return -EFAULT; - set_fs (KERNEL_DS); - ret = sys_nanosleep(&t, rmtp ? &t : NULL); - set_fs (old_fs); - if (rmtp && ret == -EINTR) { - if (__put_user (t.tv_sec, &rmtp->tv_sec) || - __put_user (t.tv_nsec, &rmtp->tv_nsec)) - return -EFAULT; - } - - return ret; -} - - - - /* These are here just in case some old sparc32 binary calls it. */ asmlinkage long sys32_pause(void) { diff -ruN 2.5.49/arch/s390x/Kconfig 2.5.49-32bit.2/arch/s390x/Kconfig --- 2.5.49/arch/s390x/Kconfig 2002-11-11 14:55:28.000000000 +1100 +++ 2.5.49-32bit.2/arch/s390x/Kconfig 2002-11-27 18:06:58.000000000 +1100 @@ -117,6 +117,11 @@ (and some other stuff like libraries and such) is needed for executing 31 bit applications. It is safe to say "Y". +config COMPAT32 + bool + depends on S390_SUPPORT + default y + config BINFMT_ELF32 tristate "Kernel support for 31 bit ELF binaries" depends on S390_SUPPORT diff -ruN 2.5.49/arch/s390x/kernel/linux32.c 2.5.49-32bit.2/arch/s390x/kernel/linux32.c --- 2.5.49/arch/s390x/kernel/linux32.c 2002-10-21 01:02:45.000000000 +1000 +++ 2.5.49-32bit.2/arch/s390x/kernel/linux32.c 2002-11-27 18:06:58.000000000 +1100 @@ -57,6 +57,7 @@ #include <linux/icmpv6.h> #include <linux/sysctl.h> #include <linux/binfmts.h> +#include <linux/compat32.h> #include <asm/types.h> #include <asm/ipc.h> @@ -1774,11 +1775,6 @@ return ret; } -struct timespec32 { - s32 tv_sec; - s32 tv_nsec; -}; - extern asmlinkage int sys_sched_rr_get_interval(pid_t pid, struct timespec *interval); asmlinkage int sys32_sched_rr_get_interval(__kernel_pid_t32 pid, struct timespec32 *interval) @@ -1796,28 +1792,6 @@ return ret; } -extern asmlinkage int sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp); - -asmlinkage int sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp) -{ - struct timespec t; - int ret; - mm_segment_t old_fs = get_fs (); - - if (get_user (t.tv_sec, &rqtp->tv_sec) || - __get_user (t.tv_nsec, &rqtp->tv_nsec)) - return -EFAULT; - set_fs (KERNEL_DS); - ret = sys_nanosleep(&t, rmtp ? &t : NULL); - set_fs (old_fs); - if (rmtp && ret == -EINTR) { - if (__put_user (t.tv_sec, &rmtp->tv_sec) || - __put_user (t.tv_nsec, &rmtp->tv_nsec)) - return -EFAULT; - } - return ret; -} - extern asmlinkage int sys_sigprocmask(int how, old_sigset_t *set, old_sigset_t *oset); asmlinkage int sys32_sigprocmask(int how, old_sigset_t32 *set, old_sigset_t32 *oset) diff -ruN 2.5.49/arch/s390x/kernel/wrapper32.S 2.5.49-32bit.2/arch/s390x/kernel/wrapper32.S --- 2.5.49/arch/s390x/kernel/wrapper32.S 2002-10-08 12:02:40.000000000 +1000 +++ 2.5.49-32bit.2/arch/s390x/kernel/wrapper32.S 2002-11-27 18:06:58.000000000 +1100 @@ -759,8 +759,8 @@ .globl sys32_nanosleep_wrapper sys32_nanosleep_wrapper: - llgtr %r2,%r2 # struct timespec_emu31 * - llgtr %r3,%r3 # struct timespec_emu31 * + llgtr %r2,%r2 # struct timespec32 * + llgtr %r3,%r3 # struct timespec32 * jg sys32_nanosleep # branch to system call .globl sys32_mremap_wrapper diff -ruN 2.5.49/arch/sparc64/Kconfig 2.5.49-32bit.2/arch/sparc64/Kconfig --- 2.5.49/arch/sparc64/Kconfig 2002-11-18 15:47:41.000000000 +1100 +++ 2.5.49-32bit.2/arch/sparc64/Kconfig 2002-11-27 18:06:58.000000000 +1100 @@ -352,6 +352,11 @@ This allows you to run 32-bit binaries on your Ultra. Everybody wants this; say Y. +config COMPAT32 + bool + depends on SPARC32_COMPAT + default y + config BINFMT_ELF32 tristate "Kernel support for 32-bit ELF binaries" depends on SPARC32_COMPAT diff -ruN 2.5.49/arch/sparc64/kernel/sys_sparc32.c 2.5.49-32bit.2/arch/sparc64/kernel/sys_sparc32.c --- 2.5.49/arch/sparc64/kernel/sys_sparc32.c 2002-11-18 15:47:41.000000000 +1100 +++ 2.5.49-32bit.2/arch/sparc64/kernel/sys_sparc32.c 2002-11-27 18:06:58.000000000 +1100 @@ -51,6 +51,7 @@ #include <linux/sysctl.h> #include <linux/binfmts.h> #include <linux/dnotify.h> +#include <linux/compat32.h> #include <asm/types.h> #include <asm/ipc.h> @@ -1794,11 +1795,6 @@ return ret; } -struct timespec32 { - s32 tv_sec; - s32 tv_nsec; -}; - extern asmlinkage int sys_sched_rr_get_interval(pid_t pid, struct timespec *interval); asmlinkage int sys32_sched_rr_get_interval(__kernel_pid_t32 pid, struct timespec32 *interval) @@ -1816,28 +1812,6 @@ return ret; } -extern asmlinkage int sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp); - -asmlinkage int sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp) -{ - struct timespec t; - int ret; - mm_segment_t old_fs = get_fs (); - - if (get_user (t.tv_sec, &rqtp->tv_sec) || - __get_user (t.tv_nsec, &rqtp->tv_nsec)) - return -EFAULT; - set_fs (KERNEL_DS); - ret = sys_nanosleep(&t, rmtp ? &t : NULL); - set_fs (old_fs); - if (rmtp && ret == -EINTR) { - if (__put_user (t.tv_sec, &rmtp->tv_sec) || - __put_user (t.tv_nsec, &rmtp->tv_nsec)) - return -EFAULT; - } - return ret; -} - extern asmlinkage int sys_sigprocmask(int how, old_sigset_t *set, old_sigset_t *oset); asmlinkage int sys32_sigprocmask(int how, old_sigset_t32 *set, old_sigset_t32 *oset) diff -ruN 2.5.49/arch/x86_64/Kconfig 2.5.49-32bit.2/arch/x86_64/Kconfig --- 2.5.49/arch/x86_64/Kconfig 2002-11-18 15:47:41.000000000 +1100 +++ 2.5.49-32bit.2/arch/x86_64/Kconfig 2002-11-27 18:06:58.000000000 +1100 @@ -425,6 +425,11 @@ turn this on, unless you're 100% sure that you don't have any 32bit programs left. +config COMPAT32 + bool + depends on IA32_EMULATION + default y + endmenu source "drivers/mtd/Kconfig" diff -ruN 2.5.49/arch/x86_64/ia32/sys_ia32.c 2.5.49-32bit.2/arch/x86_64/ia32/sys_ia32.c --- 2.5.49/arch/x86_64/ia32/sys_ia32.c 2002-11-18 15:47:41.000000000 +1100 +++ 2.5.49-32bit.2/arch/x86_64/ia32/sys_ia32.c 2002-11-27 18:06:58.000000000 +1100 @@ -58,6 +58,7 @@ #include <linux/binfmts.h> #include <linux/init.h> #include <linux/aio_abi.h> +#include <linux/compat32.h> #include <asm/mman.h> #include <asm/types.h> #include <asm/uaccess.h> @@ -934,36 +935,6 @@ (struct timeval32 *)A(a.tvp)); } -struct timespec32 { - int tv_sec; - int tv_nsec; -}; - -extern asmlinkage long sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp); - -asmlinkage long -sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp) -{ - struct timespec t; - int ret; - mm_segment_t old_fs = get_fs (); - - if (verify_area(VERIFY_READ, rqtp, sizeof(struct timespec32)) || - __get_user (t.tv_sec, &rqtp->tv_sec) || - __get_user (t.tv_nsec, &rqtp->tv_nsec)) - return -EFAULT; - set_fs (KERNEL_DS); - ret = sys_nanosleep(&t, rmtp ? &t : NULL); - set_fs (old_fs); - if (rmtp && ret == -EINTR) { - if (verify_area(VERIFY_WRITE, rmtp, sizeof(struct timespec32)) || - __put_user (t.tv_sec, &rmtp->tv_sec) || - __put_user (t.tv_nsec, &rmtp->tv_nsec)) - return -EFAULT; - } - return ret; -} - asmlinkage ssize_t sys_readv(unsigned long,const struct iovec *,unsigned long); asmlinkage ssize_t sys_writev(unsigned long,const struct iovec *,unsigned long); diff -ruN 2.5.49/include/asm-ia64/ia32.h 2.5.49-32bit.2/include/asm-ia64/ia32.h --- 2.5.49/include/asm-ia64/ia32.h 2002-10-31 14:06:05.000000000 +1100 +++ 2.5.49-32bit.2/include/asm-ia64/ia32.h 2002-11-27 18:06:58.000000000 +1100 @@ -41,11 +41,6 @@ #define IA32_CLOCKS_PER_SEC 100 /* Cast in stone for IA32 Linux */ #define IA32_TICK(tick) ((unsigned long long)(tick) * IA32_CLOCKS_PER_SEC / CLOCKS_PER_SEC) -struct timespec32 { - int tv_sec; - int tv_nsec; -}; - /* fcntl.h */ struct flock32 { short l_type; diff -ruN 2.5.49/include/linux/compat32.h 2.5.49-32bit.2/include/linux/compat32.h --- 2.5.49/include/linux/compat32.h 1970-01-01 10:00:00.000000000 +1000 +++ 2.5.49-32bit.2/include/linux/compat32.h 2002-11-27 18:06:58.000000000 +1100 @@ -0,0 +1,18 @@ +#ifndef _LINUX_COMPAT32_H +#define _LINUX_COMPAT32_H +/* + * These are the type definitions for the 32 compatibility + * layer on 64 bit architectures. + */ + +#include <linux/config.h> + +#ifdef CONFIG_COMPAT32 + +struct timespec32 { + s32 tv_sec; + s32 tv_nsec; +}; + +#endif /* CONFIG_COMPAT32 */ +#endif /* _LINUX_COMPAT32_H */ diff -ruN 2.5.49/kernel/timer.c 2.5.49-32bit.2/kernel/timer.c --- 2.5.49/kernel/timer.c 2002-11-18 15:47:56.000000000 +1100 +++ 2.5.49-32bit.2/kernel/timer.c 2002-11-27 18:06:58.000000000 +1100 @@ -25,6 +25,7 @@ #include <linux/init.h> #include <linux/mm.h> #include <linux/notifier.h> +#include <linux/compat32.h> #include <asm/uaccess.h> @@ -1024,33 +1025,63 @@ return current->pid; } -asmlinkage long sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp) +static long do_nanosleep(struct timespec *t) { - struct timespec t; unsigned long expire; - if(copy_from_user(&t, rqtp, sizeof(struct timespec))) - return -EFAULT; - - if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0 || t.tv_sec < 0) + if ((t->tv_nsec >= 1000000000L) || (t->tv_nsec < 0) || (t->tv_sec < 0)) return -EINVAL; - expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec); + expire = timespec_to_jiffies(t) + (t->tv_sec || t->tv_nsec); current->state = TASK_INTERRUPTIBLE; expire = schedule_timeout(expire); if (expire) { - if (rmtp) { - jiffies_to_timespec(expire, &t); - if (copy_to_user(rmtp, &t, sizeof(struct timespec))) - return -EFAULT; - } + jiffies_to_timespec(expire, t); return -EINTR; } return 0; } +asmlinkage long sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp) +{ + struct timespec t; + long ret; + + if (copy_from_user(&t, rqtp, sizeof(t))) + return -EFAULT; + + ret = do_nanosleep(&t); + if (rmtp && (ret == -EINTR)) { + if (copy_to_user(rmtp, &t, sizeof(t))) + return -EFAULT; + } + return ret; +} + +#ifdef CONFIG_COMPAT32 +asmlinkage s32 sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp) +{ + struct timespec t; + struct timespec32 t32; + long ret; + + if (copy_from_user(&t32, rqtp, sizeof(t32))) + return -EFAULT; + t.tv_sec = t32.tv_sec; + t.tv_nsec = t32.tv_nsec; + ret = do_nanosleep(&t); + if (rmtp && (ret == -EINTR)) { + t32.tv_sec = t.tv_sec; + t32.tv_nsec = t.tv_nsec; + if (copy_to_user(rmtp, &t32, sizeof(t32))) + return -EFAULT; + } + return ret; +} +#endif /* CONFIG_COMPAT32 */ + /* * sys_sysinfo - fill in sysinfo struct */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/