From: Thomas Gleixner tglx@linutronix.de
mainline inclusion from mainline-v6.2-rc1 commit b0b0aa5d858d4d2fe39a5e4486e0550e858108f6 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7R8WG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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del_timer_sync() does not return the number of times it tried to delete the timer which rearms itself. It's clearly documented:
The function returns whether it has deactivated a pending timer or not.
This part of the documentation is from 2003 where del_timer_sync() really returned the number of deletion attempts for unknown reasons. The code was rewritten in 2005, but the documentation was not updated.
Signed-off-by: Thomas Gleixner tglx@linutronix.de Reviewed-by: Jacob Keller jacob.e.keller@intel.com Reviewed-by: Anna-Maria Behnsen anna-maria@linutronix.de Link: https://lore.kernel.org/r/20221123201624.452282769@linutronix.de
Signed-off-by: Yu Liao liaoyu15@huawei.com --- Documentation/kernel-hacking/locking.rst | 3 +-- Documentation/translations/it_IT/kernel-hacking/locking.rst | 4 +--- 2 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/Documentation/kernel-hacking/locking.rst b/Documentation/kernel-hacking/locking.rst index 6ed806e6061b..d5ad37467d0c 100644 --- a/Documentation/kernel-hacking/locking.rst +++ b/Documentation/kernel-hacking/locking.rst @@ -1015,8 +1015,7 @@ Another common problem is deleting timers which restart themselves (by calling add_timer() at the end of their timer function). Because this is a fairly common case which is prone to races, you should use del_timer_sync() (``include/linux/timer.h``) to -handle this case. It returns the number of times the timer had to be -deleted before we finally stopped it from adding itself back in. +handle this case.
Locking Speed ============= diff --git a/Documentation/translations/it_IT/kernel-hacking/locking.rst b/Documentation/translations/it_IT/kernel-hacking/locking.rst index bf1acd6204ef..587ae37d2ee9 100644 --- a/Documentation/translations/it_IT/kernel-hacking/locking.rst +++ b/Documentation/translations/it_IT/kernel-hacking/locking.rst @@ -1037,9 +1037,7 @@ Un altro problema �� l'eliminazione dei temporizzatori che si riavviano da soli (chiamando add_timer() alla fine della loro esecuzione). Dato che questo �� un problema abbastanza comune con una propensione alle corse critiche, dovreste usare del_timer_sync() -(``include/linux/timer.h``) per gestire questo caso. Questa ritorna il -numero di volte che il temporizzatore �� stato interrotto prima che -fosse in grado di fermarlo senza che si riavviasse. +(``include/linux/timer.h``) per gestire questo caso.
Velocit�� della sincronizzazione ===============================