linux-kernel - Re: [PATCH v6 2/4] PCI: Split pci_bus_for_each_resource_p() out of pci_bus_for_each

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Date:   Wed, 22 Mar 2023 14:35:25 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Mickaël Salaün <mic@...ikod.net>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Randy Dunlap <rdunlap@...radead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Niklas Schnelle <schnelle@...ux.ibm.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Pali Rohár <pali@...nel.org>,
        "Maciej W. Rozycki" <macro@...am.me.uk>,
        Juergen Gross <jgross@...e.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        linux-kernel@...r.kernel.org, linux-alpha@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-sh@...r.kernel.org,
        sparclinux@...r.kernel.org, linux-pci@...r.kernel.org,
        xen-devel@...ts.xenproject.org, linux-acpi@...r.kernel.org,
        Miguel Ojeda <ojeda@...nel.org>,
        Richard Henderson <richard.henderson@...aro.org>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Anatolij Gustschin <agust@...x.de>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        "David S. Miller" <davem@...emloft.net>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>
Subject: Re: [PATCH v6 2/4] PCI: Split pci_bus_for_each_resource_p() out of
 pci_bus_for_each_resource()

On Mon, Mar 20, 2023 at 03:16:31PM +0200, Andy Shevchenko wrote:
> ...

> -#define pci_bus_for_each_resource(bus, res, i)				\
> -	for (i = 0;							\
> -	    (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
> -	     i++)
> +#define __pci_bus_for_each_resource(bus, res, __i, vartype)			\
> +	for (vartype __i = 0;							\
> +	     res = pci_bus_resource_n(bus, __i), __i < PCI_BRIDGE_RESOURCE_NUM;	\
> +	     __i++)
> +
> +#define pci_bus_for_each_resource(bus, res, i)					\
> +	__pci_bus_for_each_resource(bus, res, i, )
> +
> +#define pci_bus_for_each_resource_p(bus, res)					\
> +	__pci_bus_for_each_resource(bus, res, __i, unsigned int)

I like these changes a lot, too!

Same comments about _p vs _idx and __pci_bus_for_each_resource(...,
vartype).

Also would prefer 80 char max instead of 81.