From: Andy Shevchenko <andriy.shevchenko@linux•intel.com>
To: Dmitry Osipenko <digetx@gmail•com>
Cc: "Ulf Hansson" <ulf.hansson@linaro•org>,
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Subject: Re: [PATCH v2 03/45] notifier: Add atomic/blocking_notifier_has_unique_priority()
Date: Thu, 28 Oct 2021 14:00:31 +0300 [thread overview]
Message-ID: <YXqCz/utp2DFJJ45@smile.fi.intel.com> (raw)
In-Reply-To: <20211027211715.12671-4-digetx@gmail.com>
On Thu, Oct 28, 2021 at 12:16:33AM +0300, Dmitry Osipenko wrote:
> Add atomic/blocking_notifier_has_unique_priority() helpers which return
> true if given handler has unique priority.
...
> +/**
> + * atomic_notifier_has_unique_priority - Checks whether notifier's priority is unique
> + * @nh: Pointer to head of the atomic notifier chain
> + * @n: Entry in notifier chain to check
> + *
> + * Checks whether there is another notifier in the chain with the same priority.
> + * Must be called in process context.
> + *
> + * Returns true if priority is unique, false otherwise.
Why this indentation?
> + */
> +bool atomic_notifier_has_unique_priority(struct atomic_notifier_head *nh,
> + struct notifier_block *n)
> +{
> + struct notifier_block **nl = &nh->head;
> + unsigned long flags;
> + bool ret = true;
> +
> + spin_lock_irqsave(&nh->lock, flags);
> +
> + while ((*nl) != NULL && (*nl)->priority >= n->priority) {
' != NULL' is redundant.
> + if ((*nl)->priority == n->priority && (*nl) != n) {
> + ret = false;
> + break;
> + }
> +
> + nl = &((*nl)->next);
> + }
> +
> + spin_unlock_irqrestore(&nh->lock, flags);
> +
> + return ret;
> +}
...
> + /*
> + * This code gets used during boot-up, when task switching is
> + * not yet working and interrupts must remain disabled. At
One space is enough.
> + * such times we must not call down_write().
> + */
> + while ((*nl) != NULL && (*nl)->priority >= n->priority) {
' != NULL' is not needed.
> + if ((*nl)->priority == n->priority && (*nl) != n) {
> + ret = false;
> + break;
> + }
> +
> + nl = &((*nl)->next);
> + }
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-10-28 11:19 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-27 21:16 [PATCH v2 00/45] Introduce power-off+restart call chain API Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 01/45] notifier: Remove extern annotation from function prototypes Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 02/45] notifier: Add blocking_notifier_call_chain_empty() Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 03/45] notifier: Add atomic/blocking_notifier_has_unique_priority() Dmitry Osipenko
2021-10-28 11:00 ` Andy Shevchenko [this message]
2021-10-28 21:32 ` Dmitry Osipenko
2021-10-28 23:28 ` Dmitry Osipenko
2021-10-28 22:10 ` Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 04/45] reboot: Correct typo in a comment Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 05/45] reboot: Warn if restart handler has duplicated priority Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 06/45] reboot: Warn if unregister_restart_handler() fails Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 07/45] reboot: Remove extern annotation from function prototypes Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 08/45] kernel: Add combined power-off+restart handler call chain API Dmitry Osipenko
2021-10-28 9:53 ` Rafael J. Wysocki
2021-10-28 21:36 ` Dmitry Osipenko
2021-10-28 9:59 ` Rafael J. Wysocki
2021-10-28 21:58 ` Dmitry Osipenko
2021-10-28 21:59 ` Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 09/45] xen/x86: Use do_kernel_power_off() Dmitry Osipenko
2021-10-28 7:35 ` Juergen Gross
2021-10-27 21:16 ` [PATCH v2 10/45] ARM: " Dmitry Osipenko
2021-10-28 12:04 ` Russell King (Oracle)
2021-10-27 21:16 ` [PATCH v2 11/45] arm64: " Dmitry Osipenko
2021-11-01 13:28 ` Catalin Marinas
2021-10-27 21:16 ` [PATCH v2 12/45] csky: " Dmitry Osipenko
2021-11-01 1:57 ` Guo Ren
2021-10-27 21:16 ` [PATCH v2 13/45] ia64: " Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 14/45] mips: " Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 15/45] nds32: " Dmitry Osipenko
2021-10-28 12:20 ` Greentime Hu
2021-10-27 21:16 ` [PATCH v2 16/45] parisc: " Dmitry Osipenko
2021-10-28 6:38 ` Helge Deller
2021-10-27 21:16 ` [PATCH v2 17/45] powerpc: " Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 18/45] riscv: " Dmitry Osipenko
2021-10-27 23:09 ` Palmer Dabbelt
2021-10-27 21:16 ` [PATCH v2 19/45] sh: " Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 20/45] x86: " Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 21/45] m68k: Switch to new power-handler API Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 22/45] memory: emif: Use kernel_can_power_off() Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 23/45] ACPI: power: Switch to power-handler API Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 24/45] regulator: pfuze100: Use devm_register_power_handler() Dmitry Osipenko
2021-10-28 11:59 ` Mark Brown
2021-10-27 21:16 ` [PATCH v2 25/45] reboot: Remove pm_power_off_prepare() Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 26/45] soc/tegra: pmc: Utilize power-handler API to power off Nexus 7 properly Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 27/45] mfd: ntxec: Use devm_register_power_handler() Dmitry Osipenko
2021-11-06 20:54 ` Jonathan Neuschäfer
2021-11-07 16:53 ` Dmitry Osipenko
2021-11-07 17:08 ` Guenter Roeck
2021-11-07 17:16 ` Dmitry Osipenko
2021-11-07 17:32 ` Guenter Roeck
2021-11-07 17:42 ` Dmitry Osipenko
2021-11-08 11:22 ` Jonathan Neuschäfer
2021-11-08 11:36 ` Dmitry Osipenko
2021-11-10 10:43 ` Jonathan Neuschäfer
2021-11-10 13:38 ` Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 28/45] mfd: rn5t618: " Dmitry Osipenko
2021-11-29 11:55 ` Lee Jones
2021-11-29 12:04 ` Dmitry Osipenko
2021-10-27 21:16 ` [PATCH v2 29/45] mfd: acer-a500: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 30/45] mfd: ene-kb3930: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 31/45] mfd: axp20x: Use register_simple_power_off_handler() Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 32/45] mfd: retu: Use devm_register_simple_power_off_handler() Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 33/45] mfd: rk808: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 34/45] mfd: palmas: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 35/45] mfd: max8907: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 36/45] mfd: tps6586x: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 37/45] mfd: tps65910: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 38/45] mfd: max77620: " Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 39/45] mfd: dm355evm_msp: Use devm_register_trivial_power_off_handler() Dmitry Osipenko
2021-10-27 21:17 ` [PATCH v2 40/45] mfd: twl4030: " Dmitry Osipenko
2021-10-28 22:05 ` [PATCH v2 00/45] Introduce power-off+restart call chain API Dmitry Osipenko
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