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Date: Tue, 8 Aug 2023 11:15:23 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Christoph Hellwig <hch@....de>
Cc: Luis Chamberlain <mcgrof@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Daniel Mack <daniel@...que.org>,
Haojian Zhuang <haojian.zhuang@...il.com>,
Robert Jarzmik <robert.jarzmik@...e.fr>,
Manuel Lauss <manuel.lauss@...il.com>,
Yangbo Lu <yangbo.lu@....com>,
Joshua Kinard <kumba@...too.org>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Arnd Bergmann <arnd@...db.de>,
linux-arm-kernel@...ts.infradead.org,
open list <linux-kernel@...r.kernel.org>,
linux-mmc@...r.kernel.org, netdev@...r.kernel.org,
linux-rtc@...r.kernel.org, linux-modules@...r.kernel.org
Subject: Re: [PATCH 2/5] mmc: au1xmmc: force non-modular build and remove
symbol_get usage
On Tue, 1 Aug 2023 at 19:36, Christoph Hellwig <hch@....de> wrote:
>
> au1xmmc is split somewhat awkwardly into the main mmc subsystem driver,
> and callbacks in platform_data that sit under arch/mips/ and are
> always built in. The latter than call mmc_detect_change through
> symbol_get. Remove the use of symbol_get by requiring the driver
> to be built in. In the future the interrupt handlers for card
> insert/eject detection should probably be moved into the main driver,
> and which point it can be built modular again.
>
> Signed-off-by: Christoph Hellwig <hch@....de>
If not too late, feel free to add:
Acked-by: Ulf Hansson <ulf.hansson@...aro.org>
Kind regards
Uffe
> ---
> arch/mips/alchemy/devboards/db1000.c | 8 +-------
> arch/mips/alchemy/devboards/db1200.c | 19 ++-----------------
> arch/mips/alchemy/devboards/db1300.c | 10 +---------
> drivers/mmc/host/Kconfig | 4 ++--
> 4 files changed, 6 insertions(+), 35 deletions(-)
>
> diff --git a/arch/mips/alchemy/devboards/db1000.c b/arch/mips/alchemy/devboards/db1000.c
> index 79d66faa84828d..012da042d0a4f7 100644
> --- a/arch/mips/alchemy/devboards/db1000.c
> +++ b/arch/mips/alchemy/devboards/db1000.c
> @@ -14,7 +14,6 @@
> #include <linux/interrupt.h>
> #include <linux/leds.h>
> #include <linux/mmc/host.h>
> -#include <linux/module.h>
> #include <linux/platform_device.h>
> #include <linux/pm.h>
> #include <linux/spi/spi.h>
> @@ -167,12 +166,7 @@ static struct platform_device db1x00_audio_dev = {
>
> static irqreturn_t db1100_mmc_cd(int irq, void *ptr)
> {
> - void (*mmc_cd)(struct mmc_host *, unsigned long);
> - /* link against CONFIG_MMC=m */
> - mmc_cd = symbol_get(mmc_detect_change);
> - mmc_cd(ptr, msecs_to_jiffies(500));
> - symbol_put(mmc_detect_change);
> -
> + mmc_detect_change(ptr, msecs_to_jiffies(500));
> return IRQ_HANDLED;
> }
>
> diff --git a/arch/mips/alchemy/devboards/db1200.c b/arch/mips/alchemy/devboards/db1200.c
> index 1864eb935ca57f..76080c71a2a7b6 100644
> --- a/arch/mips/alchemy/devboards/db1200.c
> +++ b/arch/mips/alchemy/devboards/db1200.c
> @@ -10,7 +10,6 @@
> #include <linux/gpio.h>
> #include <linux/i2c.h>
> #include <linux/init.h>
> -#include <linux/module.h>
> #include <linux/interrupt.h>
> #include <linux/io.h>
> #include <linux/leds.h>
> @@ -340,14 +339,7 @@ static irqreturn_t db1200_mmc_cd(int irq, void *ptr)
>
> static irqreturn_t db1200_mmc_cdfn(int irq, void *ptr)
> {
> - void (*mmc_cd)(struct mmc_host *, unsigned long);
> -
> - /* link against CONFIG_MMC=m */
> - mmc_cd = symbol_get(mmc_detect_change);
> - if (mmc_cd) {
> - mmc_cd(ptr, msecs_to_jiffies(200));
> - symbol_put(mmc_detect_change);
> - }
> + mmc_detect_change(ptr, msecs_to_jiffies(200));
>
> msleep(100); /* debounce */
> if (irq == DB1200_SD0_INSERT_INT)
> @@ -431,14 +423,7 @@ static irqreturn_t pb1200_mmc1_cd(int irq, void *ptr)
>
> static irqreturn_t pb1200_mmc1_cdfn(int irq, void *ptr)
> {
> - void (*mmc_cd)(struct mmc_host *, unsigned long);
> -
> - /* link against CONFIG_MMC=m */
> - mmc_cd = symbol_get(mmc_detect_change);
> - if (mmc_cd) {
> - mmc_cd(ptr, msecs_to_jiffies(200));
> - symbol_put(mmc_detect_change);
> - }
> + mmc_detect_change(ptr, msecs_to_jiffies(200));
>
> msleep(100); /* debounce */
> if (irq == PB1200_SD1_INSERT_INT)
> diff --git a/arch/mips/alchemy/devboards/db1300.c b/arch/mips/alchemy/devboards/db1300.c
> index e70e529ddd914d..ff61901329c626 100644
> --- a/arch/mips/alchemy/devboards/db1300.c
> +++ b/arch/mips/alchemy/devboards/db1300.c
> @@ -17,7 +17,6 @@
> #include <linux/interrupt.h>
> #include <linux/ata_platform.h>
> #include <linux/mmc/host.h>
> -#include <linux/module.h>
> #include <linux/mtd/mtd.h>
> #include <linux/mtd/platnand.h>
> #include <linux/platform_device.h>
> @@ -459,14 +458,7 @@ static irqreturn_t db1300_mmc_cd(int irq, void *ptr)
>
> static irqreturn_t db1300_mmc_cdfn(int irq, void *ptr)
> {
> - void (*mmc_cd)(struct mmc_host *, unsigned long);
> -
> - /* link against CONFIG_MMC=m. We can only be called once MMC core has
> - * initialized the controller, so symbol_get() should always succeed.
> - */
> - mmc_cd = symbol_get(mmc_detect_change);
> - mmc_cd(ptr, msecs_to_jiffies(200));
> - symbol_put(mmc_detect_change);
> + mmc_detect_change(ptr, msecs_to_jiffies(200));
>
> msleep(100); /* debounce */
> if (irq == DB1300_SD1_INSERT_INT)
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 159a3e9490aed8..f7afd179dd10bf 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -526,11 +526,11 @@ config MMC_ALCOR
> of Alcor Micro PCI-E card reader
>
> config MMC_AU1X
> - tristate "Alchemy AU1XX0 MMC Card Interface support"
> + bool "Alchemy AU1XX0 MMC Card Interface support"
> depends on MIPS_ALCHEMY
> help
> This selects the AMD Alchemy(R) Multimedia card interface.
> - If you have a Alchemy platform with a MMC slot, say Y or M here.
> + If you have a Alchemy platform with a MMC slot, say Y here.
>
> If unsure, say N.
>
> --
> 2.39.2
>
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