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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-04-20 10:21:21 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-04-23 07:57:17 +0200 |
| commit | 2317b07d05d2b136eb4dc9609807c9111bda3b2a (patch) | |
| tree | b4290d962400d850031b1890568ef00a7f3fe9ab /arch/s390/include/asm/thread_info.h | |
| parent | s390/cpum_cf: rename IBM z13/z14 counter names (diff) | |
| download | linux-2317b07d05d2b136eb4dc9609807c9111bda3b2a.tar.xz linux-2317b07d05d2b136eb4dc9609807c9111bda3b2a.zip | |
s390: update sampling tag after task pid change
In a multi-threaded program any thread can call execve(). If this
is not done by the thread group leader, the de_thread() function
replaces the pid of the task that calls execve() with the pid of
thread group leader. If the task reaches user space again without
going over __switch_to() the sampling tag is still set to the old
pid.
Define the arch_setup_new_exec function to verify the task pid
and udpate the tag with LPP if it has changed.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/thread_info.h')
| -rw-r--r-- | arch/s390/include/asm/thread_info.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h index 83ba57533ce6..3c883c368eb0 100644 --- a/arch/s390/include/asm/thread_info.h +++ b/arch/s390/include/asm/thread_info.h @@ -45,6 +45,9 @@ struct thread_info { void arch_release_task_struct(struct task_struct *tsk); int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); +void arch_setup_new_exec(void); +#define arch_setup_new_exec arch_setup_new_exec + #endif /* |