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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-23 16:23:23 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-23 16:23:23 +0100 |
| commit | 1ccedb7cdba6886939dd8b4c8f965a826f696e56 (patch) | |
| tree | 0f5fc519a68faca5318c296315c9b6c502907056 /kernel/sched_stats.h | |
| parent | x86: apic reset counter on shutdown (diff) | |
| parent | Linux 2.6.28-rc9 (diff) | |
| download | linux-1ccedb7cdba6886939dd8b4c8f965a826f696e56.tar.xz linux-1ccedb7cdba6886939dd8b4c8f965a826f696e56.zip | |
Merge commit 'v2.6.28-rc9' into x86/apic
Diffstat (limited to 'kernel/sched_stats.h')
| -rw-r--r-- | kernel/sched_stats.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h index ee71bec1da66..7dbf72a2b02c 100644 --- a/kernel/sched_stats.h +++ b/kernel/sched_stats.h @@ -298,9 +298,11 @@ static inline void account_group_user_time(struct task_struct *tsk, { struct signal_struct *sig; - sig = tsk->signal; - if (unlikely(!sig)) + /* tsk == current, ensure it is safe to use ->signal */ + if (unlikely(tsk->exit_state)) return; + + sig = tsk->signal; if (sig->cputime.totals) { struct task_cputime *times; @@ -325,9 +327,11 @@ static inline void account_group_system_time(struct task_struct *tsk, { struct signal_struct *sig; - sig = tsk->signal; - if (unlikely(!sig)) + /* tsk == current, ensure it is safe to use ->signal */ + if (unlikely(tsk->exit_state)) return; + + sig = tsk->signal; if (sig->cputime.totals) { struct task_cputime *times; @@ -353,8 +357,11 @@ static inline void account_group_exec_runtime(struct task_struct *tsk, struct signal_struct *sig; sig = tsk->signal; + /* see __exit_signal()->task_rq_unlock_wait() */ + barrier(); if (unlikely(!sig)) return; + if (sig->cputime.totals) { struct task_cputime *times; |