[git pull] execve/kernel_thread/fork unification series

From: Al Viro
Date: Tue Dec 11 2012 - 11:03:50 EST

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* kernel_thread()/kernel_execve()/sys_execve() redesign.
We don't do syscalls from kernel anymore for either kernel_thread() or
kernel_execve(); kernel_thread() is essentially clone(2) with callback
run before we return to userland, the callbacks either never return or
do successful do_execve() before returning. kernel_execve() is a wrapper
for do_execve() - it doesn't need to do transition to user mode anymore.
kernel_thread() and kernel_execve() are arch-independent now - they
live in kernel/fork.c and fs/exec.c resp. sys_execve() is also in fs/exec.c
and it's completely architecture-independent.
* daemonize() is gone, along with its parts in fs/*.c
* struct pt_regs * is no longer passed to do_fork/copy_process/
copy_thread/do_execve/search_binary_handler/->load_binary/do_coredump.
* sys_fork()/sys_vfork()/sys_clone() unified; some architectures
still need wrappers (ones with callee-saved registers not saved in pt_regs
on syscall entry), but the main part of those suckers is in kernel/fork.c
now.
All architectures are converted to new model. Quite a bit of
that stuff is actually shared with architecture trees; in such cases
it's literally shared branch pulled by both, not a cherry-pick.

A lot of ugliness and black magic is gone (-3KLoC total in this
one). Please, pull from
git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal for-linus

Shortlog:
Al Viro (107):
sparc64: clear syscall_noerror on the entry to syscall, not on the exit
sparc64: switch to generic kernel_thread()
sparc64: take fprs_write() and friends to start_thread()
sparc64: switch to generic kernel_execve()
mips: switch to generic kernel_thread()
ia64: clone() had been unused since 2004
ia64: dead code in copy_thread() since 2004
ia64: don't mess with ar_bspstore in kernel_thread()
powerpc: switch to saner kernel_execve() semantics
powerpc: don't mess with r2 in copy_thread() and friends
parisc: switch to generic kernel_thread()
parisc: switch to generic kernel_execve()
parisc: switch to generic sys_execve()
parisc: optimizations in copy_thread() and friends
h8300: generic kernel_thread()
h8300: generic kernel_execve()
h8300: generic sys_execve()
mn10300: switch to saner kernel_execve() semantics
blackfin: convert kernel_thread() and kernel_execve() to generic ones
blackfin: switch to generic sys_execve()
cris: switch to generic kernel_thread()
cris: switch to generic kernel_execve/sys_execve
avr32: switch to generic kernel_thread()/kernel_execve()
avr32: switch to generic sys_execve()
c6x: switch to saner kernel_execve() semantics
score: switch to generic kernel_thread()/kernel_execve()
score: switch to generic sys_execve()
mips: switch to saner kernel_execve() semantics
sparc64: convert to generic execve
sparc32: bury the remnants of LOWSYS tricks
sparc32: switch to generic kernel_thread()
sparc32: switch to generic kernel_execve()
sparc32: switch to generic sys_execve()
m68k: switch to saner kernel_execve() semantics
ia64: switch to generic kernel_thread()/kernel_execve()
ia64: switch to generic sys_execve()
Drop struct pt_regs * argument in compat_sys_execve()
powerpc: take dereferencing to ret_from_kernel_thread()
powerpc: don't bother with zero-extending arguments in sys_clone()
powerpc: don't bother with CHECK_FULL_REGS in sys_fork() et.al.
powerpc: put the "zero usp means using parent's stack pointer" to copy_thread()
powerpc: make fork_idle() take the common "kernel thread" path in copy_thread()
parisc: switch to saner kernel_execve() semantics
arm64: get rid of fork/vfork/clone wrappers
sh: switch to generic kernel_thread()/kernel_execve()
sh: convert to generic sys_execve()
tile: switch to generic sys_execve()
hexagon: kernel_thread()/kernel_execve() conversion
hexagon: switch to generic sys_execve()
tile: sanitize copy_thread()
s390: switch to saner kernel_execve() semantics
m32r: switch to generic kernel_thread()/kernel_execve()
m32r: switch to generic sys_execve()
microblaze: switch to generic kernel_thread()
microblaze: switch to generic kernel_execve()
microblaze: switch to generic sys_execve()
tile: compat rt_sigreturn gets too enthusiastic about sigaltstack errors
kill daemonize()
um: don't bother with passing sp to do_fork() for fork(2)/vfork(2)
um: don't bother looking at regs in copy_thread() - current_pt_regs() is what we'll get
alpha: simplify fork and friends
alpha: don't pass useless arguments to do_{,rt_},sigreturn()
alpha: reorganize copy_process(), prepare to saner fork_idle()
generic sys_fork / sys_vfork / sys_clone
consolidate sys_execve() prototype
audit: no nested contexts anymore...
kill stray kernel_thread() garbage
make compat_do_execve() static, lose pt_regs argument
get rid of pt_regs argument of do_execve()
get rid of pt_regs argument of do_execve_common()
get rid of pt_regs argument of search_binary_handler()
get rid of pt_regs argument of ->load_binary()
x86, um: switch to generic fork/vfork/clone
arm: switch to generic fork/vfork/clone
powerpc: switch to generic fork/clone/vfork
frv: switch to generic fork/vfork/clone
arm64: sanitize copy_thread(), switch to generic fork/vfork/clone
avr32: sanitize copy_thread(), switch to generic fork/vfork/clone, kill wrappers
cris: switch to generic fork/vfork/clone
m32r: switch to generic fork/vfork/clone
parisc: switch to generic fork/vfork/clone
sh: switch to generic fork/vfork/clone
hexagon: switch to generic clone()
microblaze: switch to generic fork/vfork/clone
s390: switch to generic fork/vfork/clone
alpha: switch to generic fork/vfork/clone
m68k: sanitize copy_thread(), fork/vfork/clone wrappers, switch to generic fork/vfork
tile: switch to generic clone()
h8300: switch to generic fork/vfork/clone
mn10300: switch to generic fork/vfork/clone
take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h
c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone()
score: switch to generic fork/vfork/clone
unicore32: switch to generic clone(2)
openrisc: switch to use of generic fork and clone
xtensa: switch to generic clone()
bfin: switch to generic vfork, get rid of pointless wrappers
flagday: don't pass regs to copy_thread()
don't pass regs to copy_process()
death to idle_regs()
flagday: kill pt_regs argument of do_fork()
unify default ptrace_signal_deliver
new helper: signal_pt_regs()
get rid of ptrace_signal_deliver() arguments
ptrace_signal(): get rid of unused arguments
print_fatal_signal(): get rid of pt_regs argument
do_coredump(): get rid of pt_regs argument

Catalin Marinas (3):
arm64: Use generic kernel_thread() implementation
arm64: Use generic kernel_execve() implementation
arm64: Use generic sys_execve() implementation

Chris Metcalf (2):
tile: support GENERIC_KERNEL_THREAD and GENERIC_KERNEL_EXECVE
arch/tile: eliminate pt_regs trampolines for syscalls

Jonas Bonn (3):
openrisc: pass correct arg to schedule_tail
openrisc: use generic kernel_thread/kernel_execve
openrisc: use generic sys_execve

Michal Simek (1):
microblaze: Fix bug with schedule_tail

Ralf Baechle (1):
MIPS: Switch over to generic sys_execve and kernel_execve.

Diffstat:
arch/Kconfig | 14 ++
arch/alpha/include/asm/ptrace.h | 1 +
arch/alpha/include/asm/signal.h | 3 -
arch/alpha/include/asm/unistd.h | 3 +
arch/alpha/kernel/binfmt_loader.c | 4 +-
arch/alpha/kernel/entry.S | 51 ++-----
arch/alpha/kernel/process.c | 62 ++------
arch/alpha/kernel/signal.c | 16 +-
arch/alpha/kernel/systbls.S | 6 +-
arch/arm/Kconfig | 1 +
arch/arm/include/asm/signal.h | 1 -
arch/arm/include/asm/unistd.h | 3 +
arch/arm/kernel/calls.S | 6 +-
arch/arm/kernel/entry-common.S | 16 --
arch/arm/kernel/process.c | 11 +-
arch/arm/kernel/sys_arm.c | 31 ----
arch/arm64/Kconfig | 3 +
arch/arm64/include/asm/processor.h | 5 -
arch/arm64/include/asm/syscalls.h | 8 -
arch/arm64/include/asm/unistd.h | 4 +
arch/arm64/include/asm/unistd32.h | 8 +-
arch/arm64/kernel/entry.S | 17 +--
arch/arm64/kernel/process.c | 86 ++++-------
arch/arm64/kernel/sys.c | 81 ----------
arch/arm64/kernel/sys32.S | 19 ---
arch/arm64/kernel/sys_compat.c | 39 -----
arch/avr32/Kconfig | 2 +
arch/avr32/include/asm/processor.h | 3 -
arch/avr32/include/asm/signal.h | 2 -
arch/avr32/include/asm/unistd.h | 4 +
arch/avr32/kernel/Makefile | 2 +-
arch/avr32/kernel/entry-avr32b.S | 14 +-
arch/avr32/kernel/process.c | 115 +++------------
arch/avr32/kernel/sys_avr32.c | 24 ---
arch/avr32/kernel/syscall-stubs.S | 24 ---
arch/avr32/kernel/syscall_table.S | 8 +-
arch/blackfin/Kconfig | 2 +
arch/blackfin/include/asm/processor.h | 2 -
arch/blackfin/include/asm/unistd.h | 2 +
arch/blackfin/kernel/entry.S | 55 +------
arch/blackfin/kernel/process.c | 98 +++----------
arch/blackfin/kernel/signal.c | 4 +-
arch/blackfin/mach-common/entry.S | 57 +-------
arch/c6x/Kconfig | 1 +
arch/c6x/include/asm/syscalls.h | 4 -
arch/c6x/include/uapi/asm/unistd.h | 2 +-
arch/c6x/kernel/entry.S | 24 +---
arch/c6x/kernel/process.c | 25 +---
arch/cris/Kconfig | 3 +
arch/cris/arch-v10/kernel/entry.S | 17 +-
arch/cris/arch-v10/kernel/process.c | 121 +++-------------
arch/cris/arch-v32/kernel/entry.S | 22 ++-
arch/cris/arch-v32/kernel/process.c | 118 +++------------
arch/cris/include/asm/processor.h | 2 -
arch/cris/include/asm/signal.h | 6 -
arch/cris/include/asm/unistd.h | 4 +
arch/cris/kernel/crisksyms.c | 1 -
arch/frv/include/asm/unistd.h | 3 +
arch/frv/kernel/process.c | 45 +-----
arch/h8300/Kconfig | 2 +
arch/h8300/include/asm/processor.h | 2 -
arch/h8300/include/asm/ptrace.h | 3 +
arch/h8300/include/asm/signal.h | 2 -
arch/h8300/include/asm/unistd.h | 4 +
arch/h8300/kernel/entry.S | 9 +
arch/h8300/kernel/h8300_ksyms.c | 1 -
arch/h8300/kernel/process.c | 100 ++-----------
arch/h8300/kernel/sys_h8300.c | 26 ----
arch/h8300/kernel/syscalls.S | 9 -
arch/hexagon/Kconfig | 2 +
arch/hexagon/include/asm/processor.h | 1 -
arch/hexagon/include/asm/syscall.h | 8 -
arch/hexagon/include/uapi/asm/ptrace.h | 4 +
arch/hexagon/include/uapi/asm/unistd.h | 2 +
arch/hexagon/kernel/Makefile | 3 +-
arch/hexagon/kernel/process.c | 100 ++++---------
arch/hexagon/kernel/signal.c | 4 +-
arch/hexagon/kernel/syscall.c | 89 -----------
arch/hexagon/kernel/vm_entry.S | 4 +
arch/ia64/Kconfig | 2 +
arch/ia64/include/asm/processor.h | 16 --
arch/ia64/include/asm/signal.h | 2 -
arch/ia64/include/asm/unistd.h | 1 +
arch/ia64/kernel/entry.S | 53 ++++---
arch/ia64/kernel/head.S | 13 --
arch/ia64/kernel/process.c | 161 ++++++++-------------
arch/ia64/kernel/smpboot.c | 5 -
arch/m32r/Kconfig | 2 +
arch/m32r/include/asm/processor.h | 5 -
arch/m32r/include/asm/ptrace.h | 2 +
arch/m32r/include/asm/signal.h | 4 -
arch/m32r/include/asm/unistd.h | 4 +
arch/m32r/kernel/entry.S | 9 +
arch/m32r/kernel/m32r_ksyms.c | 1 -
arch/m32r/kernel/process.c | 126 ++--------------
arch/m32r/kernel/sys_m32r.c | 21 ---
arch/m68k/Kconfig | 1 +
arch/m68k/include/asm/signal.h | 8 +-
arch/m68k/include/asm/unistd.h | 3 +-
arch/m68k/kernel/entry.S | 30 +---
arch/m68k/kernel/process.c | 87 ++++-------
arch/m68k/kernel/signal.c | 3 +-
arch/m68k/kernel/syscalltable.S | 6 +-
arch/microblaze/Kconfig | 3 +
arch/microblaze/include/asm/Kbuild | 1 +
arch/microblaze/include/asm/processor.h | 8 +-
arch/microblaze/include/asm/syscalls.h | 16 --
arch/microblaze/include/asm/unistd.h | 6 +
arch/microblaze/kernel/entry-nommu.S | 20 +--
arch/microblaze/kernel/entry.S | 57 +------
arch/microblaze/kernel/process.c | 75 +++-------
arch/microblaze/kernel/sys_microblaze.c | 53 -------
arch/microblaze/kernel/syscall_table.S | 6 +-
arch/mips/Kconfig | 2 +
arch/mips/include/asm/processor.h | 2 -
arch/mips/include/asm/ptrace.h | 6 +
arch/mips/include/asm/signal.h | 2 -
arch/mips/include/asm/unistd.h | 1 +
arch/mips/kernel/entry.S | 6 +
arch/mips/kernel/linux32.c | 23 +---
arch/mips/kernel/mips_ksyms.c | 2 -
arch/mips/kernel/process.c | 64 +++-----
arch/mips/kernel/scall64-n32.S | 2 +-
arch/mips/kernel/scall64-o32.S | 2 +-
arch/mips/kernel/syscall.c | 57 +-------
arch/mn10300/Kconfig | 1 +
arch/mn10300/include/asm/signal.h | 4 -
arch/mn10300/include/asm/unistd.h | 4 +-
arch/mn10300/kernel/entry.S | 7 +-
arch/mn10300/kernel/process.c | 33 +----
arch/openrisc/Kconfig | 2 +
arch/openrisc/include/asm/processor.h | 2 -
arch/openrisc/include/asm/syscalls.h | 7 +
arch/openrisc/include/uapi/asm/unistd.h | 4 +
arch/openrisc/kernel/Makefile | 2 +-
arch/openrisc/kernel/entry.S | 55 +++----
arch/openrisc/kernel/process.c | 164 +++++++-------------
arch/openrisc/kernel/sys_or32.c | 57 -------
arch/parisc/Kconfig | 3 +
arch/parisc/include/asm/processor.h | 1 -
arch/parisc/include/asm/signal.h | 2 -
arch/parisc/include/asm/unistd.h | 4 +
arch/parisc/kernel/entry.S | 241 +++---------------------------
arch/parisc/kernel/process.c | 142 +++---------------
arch/parisc/kernel/sys_parisc32.c | 22 ---
arch/parisc/kernel/syscall_table.S | 2 +-
arch/powerpc/Kconfig | 2 +
arch/powerpc/include/asm/signal.h | 2 -
arch/powerpc/include/asm/syscalls.h | 9 -
arch/powerpc/include/asm/unistd.h | 4 +-
arch/powerpc/kernel/entry_32.S | 5 -
arch/powerpc/kernel/entry_64.S | 8 +-
arch/powerpc/kernel/process.c | 64 +-------
arch/s390/Kconfig | 2 +
arch/s390/include/asm/signal.h | 2 -
arch/s390/include/asm/unistd.h | 4 +-
arch/s390/kernel/entry.S | 32 +----
arch/s390/kernel/entry.h | 4 -
arch/s390/kernel/entry64.S | 26 +---
arch/s390/kernel/process.c | 53 ++------
arch/score/Kconfig | 3 +
arch/score/include/asm/processor.h | 1 -
arch/score/include/asm/syscalls.h | 2 -
arch/score/include/asm/unistd.h | 4 +
arch/score/kernel/entry.S | 30 +---
arch/score/kernel/process.c | 57 ++-----
arch/score/kernel/sys_score.c | 89 -----------
arch/sh/Kconfig | 2 +
arch/sh/include/asm/processor_32.h | 5 -
arch/sh/include/asm/processor_64.h | 5 -
arch/sh/include/asm/syscalls_32.h | 14 --
arch/sh/include/asm/syscalls_64.h | 17 --
arch/sh/include/asm/unistd.h | 4 +
arch/sh/kernel/Makefile | 3 +-
arch/sh/kernel/cpu/sh5/entry.S | 19 +++
arch/sh/kernel/entry-common.S | 13 ++
arch/sh/kernel/process_32.c | 134 +++--------------
arch/sh/kernel/process_64.c | 127 +++-------------
arch/sh/kernel/sys_sh32.c | 24 ---
arch/sh/kernel/sys_sh64.c | 50 ------
arch/sparc/Kconfig | 2 +
arch/sparc/include/asm/processor_32.h | 1 -
arch/sparc/include/asm/processor_64.h | 11 +-
arch/sparc/include/asm/ptrace.h | 10 +-
arch/sparc/include/asm/signal.h | 2 -
arch/sparc/include/asm/switch_to_64.h | 2 +-
arch/sparc/include/asm/syscalls.h | 2 -
arch/sparc/include/asm/thread_info_64.h | 25 ++--
arch/sparc/include/asm/uaccess_64.h | 4 +-
arch/sparc/include/asm/unistd.h | 1 +
arch/sparc/kernel/entry.S | 51 +++----
arch/sparc/kernel/etrap_64.S | 8 +-
arch/sparc/kernel/process_32.c | 158 ++++++--------------
arch/sparc/kernel/process_64.c | 148 ++++--------------
arch/sparc/kernel/sys_sparc32.c | 36 -----
arch/sparc/kernel/sys_sparc_32.c | 24 ---
arch/sparc/kernel/sys_sparc_64.c | 22 ---
arch/sparc/kernel/syscalls.S | 30 ++--
arch/sparc/kernel/systbls_64.S | 2 +-
arch/sparc/kernel/traps_64.c | 4 +-
arch/sparc/mm/init_64.c | 2 +-
arch/tile/Kconfig | 2 +
arch/tile/include/asm/compat.h | 15 +--
arch/tile/include/asm/elf.h | 1 +
arch/tile/include/asm/processor.h | 6 +-
arch/tile/include/asm/switch_to.h | 5 +-
arch/tile/include/asm/syscalls.h | 13 +-
arch/tile/include/asm/unistd.h | 2 +
arch/tile/kernel/compat.c | 4 +-
arch/tile/kernel/compat_signal.c | 10 +-
arch/tile/kernel/entry.S | 11 --
arch/tile/kernel/intvec_32.S | 29 ++--
arch/tile/kernel/intvec_64.S | 30 ++--
arch/tile/kernel/process.c | 171 ++++++----------------
arch/tile/kernel/signal.c | 9 +-
arch/tile/kernel/sys.c | 8 +-
arch/tile/mm/fault.c | 5 +-
arch/um/kernel/process.c | 5 +-
arch/um/kernel/syscall.c | 23 ---
arch/unicore32/include/uapi/asm/unistd.h | 1 +
arch/unicore32/kernel/entry.S | 6 -
arch/unicore32/kernel/process.c | 11 +-
arch/unicore32/kernel/sys.c | 14 --
arch/x86/Kconfig | 1 +
arch/x86/ia32/ia32_aout.c | 5 +-
arch/x86/ia32/ia32entry.S | 7 +-
arch/x86/ia32/sys_ia32.c | 11 --
arch/x86/include/asm/processor.h | 2 -
arch/x86/include/asm/signal.h | 2 -
arch/x86/include/asm/sys_ia32.h | 2 -
arch/x86/include/asm/syscalls.h | 9 -
arch/x86/include/asm/unistd.h | 3 +
arch/x86/kernel/cpu/common.c | 9 -
arch/x86/kernel/entry_32.S | 18 ---
arch/x86/kernel/entry_64.S | 22 +++-
arch/x86/kernel/process.c | 30 ----
arch/x86/kernel/process_32.c | 12 +-
arch/x86/kernel/process_64.c | 10 +-
arch/x86/syscalls/syscall_32.tbl | 6 +-
arch/x86/um/Kconfig | 1 +
arch/x86/um/shared/sysdep/syscalls.h | 2 -
arch/x86/um/sys_call_table_32.c | 3 -
arch/x86/um/syscalls_32.c | 15 --
arch/xtensa/Kconfig | 1 +
arch/xtensa/include/asm/signal.h | 1 -
arch/xtensa/include/asm/syscall.h | 2 -
arch/xtensa/include/asm/unistd.h | 1 +
arch/xtensa/include/uapi/asm/unistd.h | 2 +-
arch/xtensa/kernel/process.c | 12 +--
drivers/staging/gdm72xx/gdm_usb.c | 4 +-
fs/binfmt_aout.c | 5 +-
fs/binfmt_elf.c | 5 +-
fs/binfmt_elf_fdpic.c | 6 +-
fs/binfmt_em86.c | 4 +-
fs/binfmt_flat.c | 5 +-
fs/binfmt_misc.c | 4 +-
fs/binfmt_script.c | 4 +-
fs/binfmt_som.c | 5 +-
fs/coredump.c | 4 +-
fs/exec.c | 37 ++---
fs/file.c | 6 -
fs/fs_struct.c | 24 ---
include/asm-generic/signal.h | 2 -
include/asm-generic/syscalls.h | 20 ---
include/linux/binfmts.h | 4 +-
include/linux/compat.h | 4 -
include/linux/coredump.h | 4 +-
include/linux/fdtable.h | 1 -
include/linux/fs_struct.h | 1 -
include/linux/ptrace.h | 13 ++
include/linux/sched.h | 7 +-
include/linux/syscalls.h | 16 ++-
kernel/auditsc.c | 102 +++----------
kernel/exit.c | 92 -----------
kernel/fork.c | 64 ++++++--
kernel/signal.c | 15 +-
276 files changed, 1412 insertions(+), 4409 deletions(-)
delete mode 100644 arch/avr32/kernel/sys_avr32.c
delete mode 100644 arch/hexagon/kernel/syscall.c
delete mode 100644 arch/microblaze/include/asm/syscalls.h
delete mode 100644 arch/openrisc/kernel/sys_or32.c
delete mode 100644 arch/sh/kernel/sys_sh64.c
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Next message: Sylwester Nawrocki: "Re: [PATCH RFC 05/13] of: Add empty for_each_available_child_of_node()macro definition"
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