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author | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-11 03:28:25 +0200 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-12 19:35:07 +0200 |
commit | a74fb73c12398b250fdc5e333a11e15a9e3a84fc (patch) | |
tree | 2bec2f6e20320f5a4bc01d1e19d7190842ef1c37 /kernel/kthread.c | |
parent | make sure that kernel_thread() callbacks call do_exit() themselves (diff) | |
download | linux-a74fb73c12398b250fdc5e333a11e15a9e3a84fc.tar.xz linux-a74fb73c12398b250fdc5e333a11e15a9e3a84fc.zip |
infrastructure for saner ret_from_kernel_thread semantics
* allow kernel_execve() leave the actual return to userland to
caller (selected by CONFIG_GENERIC_KERNEL_EXECVE). Callers
updated accordingly.
* architecture that does select GENERIC_KERNEL_EXECVE in its
Kconfig should have its ret_from_kernel_thread() do this:
call schedule_tail
call the callback left for it by copy_thread(); if it ever
returns, that's because it has just done successful kernel_execve()
jump to return from syscall
IOW, its only difference from ret_from_fork() is that it does call the
callback.
* such an architecture should also get rid of ret_from_kernel_execve()
and __ARCH_WANT_KERNEL_EXECVE
This is the last part of infrastructure patches in that area - from
that point on work on different architectures can live independently.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/kthread.c')
-rw-r--r-- | kernel/kthread.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index b579af57ea10..7ba65c1aa6b3 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -16,6 +16,7 @@ #include <linux/mutex.h> #include <linux/slab.h> #include <linux/freezer.h> +#include <linux/ptrace.h> #include <trace/events/sched.h> static DEFINE_SPINLOCK(kthread_create_lock); |