linux-toradex.git/kernel/fork.c, branch v2.6.28.9

copy_process: fix CLONE_PARENT && parent_exec_id interaction

2009-03-17T00:32:27+00:00

commit 2d5516cbb9daf7d0e342a2e3b0fc6f8c39a81205 upstream.

CLONE_PARENT can fool the ->self_exec_id/parent_exec_id logic. If we
re-use the old parent, we must also re-use ->parent_exec_id to make
sure exit_notify() sees the right ->xxx_exec_id's when the CLONE_PARENT'ed
task exits.

Also, move down the "p->parent_exec_id = p->self_exec_id" thing, to place
two different cases together.

Signed-off-by: Oleg Nesterov 
Cc: Roland McGrath 
Cc: Andrew Morton 
Cc: David Howells 
Cc: Serge E. Hallyn 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 30

2009-01-18T18:44:01+00:00

commit 6559eed8ca7db0531a207cd80be5e28cd6f213c5 upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

System call wrappers part 08

2009-01-18T18:43:55+00:00

commit 17da2bd90abf428523de0fb98f7075e00e3ed42e upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

fix mapping_writably_mapped()

2008-12-10T22:40:45+00:00

Lee Schermerhorn noticed yesterday that I broke the mapping_writably_mapped
test in 2.6.7!  Bad bad bug, good good find.

The i_mmap_writable count must be incremented for VM_SHARED (just as
i_writecount is for VM_DENYWRITE, but while holding the i_mmap_lock)
when dup_mmap() copies the vma for fork: it has its own more optimal
version of __vma_link_file(), and I missed this out.  So the count
was later going down to 0 (dangerous) when one end unmapped, then
wrapping negative (inefficient) when the other end unmapped.

The only impact on x86 would have been that setting a mandatory lock on
a file which has at some time been opened O_RDWR and mapped MAP_SHARED
(but not necessarily PROT_WRITE) across a fork, might fail with -EAGAIN
when it should succeed, or succeed when it should fail.

But those architectures which rely on flush_dcache_page() to flush
userspace modifications back into the page before the kernel reads it,
may in some cases have skipped the flush after such a fork - though any
repetitive test will soon wrap the count negative, in which case it will
flush_dcache_page() unnecessarily.

Fix would be a two-liner, but mapping variable added, and comment moved.

Reported-by: Lee Schermerhorn 
Signed-off-by: Hugh Dickins 
Signed-off-by: Linus Torvalds

[PATCH] return records for fork() both to child and parent

2008-12-09T07:27:38+00:00

Signed-off-by: Al Viro

Move "exit_robust_list" into mm_release()

2008-11-15T18:20:36+00:00

We don't want to get rid of the futexes just at exit() time, we want to
drop them when doing an execve() too, since that gets rid of the
previous VM image too.

Doing it at mm_release() time means that we automatically always do it
when we disassociate a VM map from the task.

Reported-by: pageexec@freemail.hu
Cc: Andrew Morton 
Cc: Nick Piggin 
Cc: Hugh Dickins 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: Brad Spengler 
Cc: Alex Efros 
Cc: Peter Zijlstra 
Cc: Oleg Nesterov 
Signed-off-by: Linus Torvalds

Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2

2008-10-22T07:48:06+00:00

Conflicts:

	kernel/time/tick-sched.c

Signed-off-by: Thomas Gleixner

Merge branch 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-10-20T20:35:07+00:00

* 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (131 commits)
  tracing/fastboot: improve help text
  tracing/stacktrace: improve help text
  tracing/fastboot: fix initcalls disposition in bootgraph.pl
  tracing/fastboot: fix bootgraph.pl initcall name regexp
  tracing/fastboot: fix issues and improve output of bootgraph.pl
  tracepoints: synchronize unregister static inline
  tracepoints: tracepoint_synchronize_unregister()
  ftrace: make ftrace_test_p6nop disassembler-friendly
  markers: fix synchronize marker unregister static inline
  tracing/fastboot: add better resolution to initcall debug/tracing
  trace: add build-time check to avoid overrunning hex buffer
  ftrace: fix hex output mode of ftrace
  tracing/fastboot: fix initcalls disposition in bootgraph.pl
  tracing/fastboot: fix printk format typo in boot tracer
  ftrace: return an error when setting a nonexistent tracer
  ftrace: make some tracers reentrant
  ring-buffer: make reentrant
  ring-buffer: move page indexes into page headers
  tracing/fastboot: only trace non-module initcalls
  ftrace: move pc counter in irqtrace
  ...

Manually fix conflicts:
 - init/main.c: initcall tracing
 - kernel/module.c: verbose level vs tracepoints
 - scripts/bootgraph.pl: fallout from cherry-picking commits.

Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus

2008-10-20T11:14:06+00:00

Merge commit 'linus/master' into merge-linus

2008-10-17T16:20:26+00:00

Conflicts:

	arch/x86/kvm/i8254.c