diff options
| author | Tiwei Bie <tiwei.btw@antgroup.com> | 2025-10-27 08:18:10 +0800 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2025-10-27 16:41:15 +0100 |
| commit | 2670917c2fc8902558f3aba4f41e5cc5bf6e18fa (patch) | |
| tree | 257b673beaa85834ea9af4e664ba34c71c40b7ad /arch/um/os-Linux/internal.h | |
| parent | 9e5a9f1c9b336871c8e76c1cefd85182c5b58541 (diff) | |
um: Determine sleep based on need_resched()
With SMP and NO_HZ enabled, the CPU may still need to sleep even
if the timer is disarmed. Switch to deciding whether to sleep based
on pending resched. Additionally, because disabling IRQs does not
block SIGALRM, it is also necessary to check for any pending timer
alarms. This is a preparation for adding SMP support.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20251027001815.1666872-4-tiwei.bie@linux.dev
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'arch/um/os-Linux/internal.h')
| -rw-r--r-- | arch/um/os-Linux/internal.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/um/os-Linux/internal.h b/arch/um/os-Linux/internal.h index 5d8d3b0817a9..c2c7a0dc673c 100644 --- a/arch/um/os-Linux/internal.h +++ b/arch/um/os-Linux/internal.h @@ -16,6 +16,11 @@ void scan_elf_aux(char **envp); void check_tmpexec(void); /* + * signal.c + */ +int timer_alarm_pending(void); + +/* * skas/process.c */ void wait_stub_done(int pid); |