diff options
Diffstat (limited to 'kernel/entry')
| -rw-r--r-- | kernel/entry/syscall-common.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/entry/syscall-common.c b/kernel/entry/syscall-common.c index 940a597ded40..f7ee25b9cf27 100644 --- a/kernel/entry/syscall-common.c +++ b/kernel/entry/syscall-common.c @@ -17,8 +17,7 @@ static inline void syscall_enter_audit(struct pt_regs *regs, long syscall) } } -long syscall_trace_enter(struct pt_regs *regs, long syscall, - unsigned long work) +long syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long work) { long ret = 0; @@ -32,6 +31,14 @@ long syscall_trace_enter(struct pt_regs *regs, long syscall, return -1L; } + /* + * User space got a time slice extension granted and relinquishes + * the CPU. The work stops the slice timer to avoid an extra round + * through hrtimer_interrupt(). + */ + if (work & SYSCALL_WORK_SYSCALL_RSEQ_SLICE) + rseq_syscall_enter_work(syscall); + /* Handle ptrace */ if (work & (SYSCALL_WORK_SYSCALL_TRACE | SYSCALL_WORK_SYSCALL_EMU)) { ret = ptrace_report_syscall_entry(regs); |