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* [PATCH] net: ethernet: ti: Remove TI_CPTS_MOD workaround
@ 2020-05-02 23:39 Clay McClure
  2020-05-04 15:09 ` Tony Lindgren
  2020-05-04 15:16 ` Arnd Bergmann
  0 siblings, 2 replies; 8+ messages in thread
From: Clay McClure @ 2020-05-02 23:39 UTC (permalink / raw)
  Cc: Clay McClure, Arnd Bergmann, Grygorii Strashko,
	kbuild test robot, Russell King, Tony Lindgren, David S. Miller,
	Wingman Kwok, Murali Karicheri, Nicolas Ferre, Andi Kleen,
	Geert Uytterhoeven, Dinh Nguyen, Eric W. Biederman,
	Krzysztof Kozlowski, Ilias Apalodimas, Jesper Dangaard Brouer,
	Ivan Khoronzhuk, Kees Cook, Pankaj Bharadiya, Richard Cochran,
	linux-arm-kernel, linux-kernel, linux-omap, netdev

My recent commit b6d49cab44b5 ("net: Make PTP-specific drivers depend on PTP_1588_CLOCK")
exposes a missing dependency in defconfigs that select TI_CPTS without
selecting PTP_1588_CLOCK, leading to linker errors of the form:

drivers/net/ethernet/ti/cpsw.o: in function `cpsw_ndo_stop':
cpsw.c:(.text+0x680): undefined reference to `cpts_unregister'
drivers/net/ethernet/ti/cpsw.o: in function `cpsw_remove':
cpsw.c:(.text+0x81c): undefined reference to `cpts_release'
drivers/net/ethernet/ti/cpsw.o: in function `cpsw_rx_handler':
cpsw.c:(.text+0x1324): undefined reference to `cpts_rx_timestamp'
drivers/net/ethernet/ti/cpsw.o: in function `cpsw_ndo_open':
cpsw.c:(.text+0x15ec): undefined reference to `cpts_register'
drivers/net/ethernet/ti/cpsw.o: in function `cpsw_probe':
cpsw.c:(.text+0x2468): undefined reference to `cpts_release'

That's because TI_CPTS_MOD (which is the symbol gating the _compilation_
of cpts.c) now depends on PTP_1588_CLOCK, and so is not enabled in these
configurations, but TI_CPTS (which is the symbol gating _calls_ to the
cpts functions) _is_ enabled. So we end up compiling calls to functions
that don't exist, resulting in the linker errors.

The reason we have two symbols (TI_CPTS and TI_CPTS_MOD) for the same
driver is due to commit be9ca0d33c85 ("cpsw/netcp: work around reverse
cpts dependency"), which introduced TI_CPTS_MOD because (quoting the
commit message):

> The dependency is reversed: cpsw and netcp call into cpts,
> but cpts depends on the other two in Kconfig. This can lead
> to cpts being a loadable module and its callers built-in:
>
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_remove':
> cpsw.c:(.text.cpsw_remove+0xd0): undefined reference to `cpts_release'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_rx_handler':
> cpsw.c:(.text.cpsw_rx_handler+0x2dc): undefined reference to `cpts_rx_timestamp'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_tx_handler':
> cpsw.c:(.text.cpsw_tx_handler+0x7c): undefined reference to `cpts_tx_timestamp'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_ndo_stop':

Both forms of linker error -- those caused by defconfigs that select
TI_CPTS without PTP_1588_CLOCK and those caused by configuring TI_CPSW
as a built-in and TI_CPTS as a module -- can be avoided by using the
IS_REACHABLE() macro to gate calls to cpts functions, and using the
TI_CPTS symbol to gate compilation of cpts.c. cpts.h already provides
the no-op stub implementations of the cpts functions required to make
this work, we just need to change the existing IS_ENABLED(TI_CPTS)
guards to IS_REACHABLE(TI_CPTS).

With this change there is no longer any need for the TI_CPTS_MOD symbol,
so we can remove it.

To preserve the existing behavior of defconfigs that select TI_CPTS, we
must also select PTP_1588_CLOCK so that the dependency is satisfied.
omap2plus_defconfig and keystone_defconfig have not been updated in a
while, so some unrelated no-op changes appear in the diff.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Fixes: b6d49cab44b5 ("net: Make PTP-specific drivers depend on PTP_1588_CLOCK")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Clay McClure <clay@daemons.net>
---
 arch/arm/configs/keystone_defconfig    | 72 ++++++++++++--------------
 arch/arm/configs/omap2plus_defconfig   |  3 +-
 drivers/net/ethernet/ti/Kconfig        | 13 ++---
 drivers/net/ethernet/ti/Makefile       |  2 +-
 drivers/net/ethernet/ti/cpsw_ethtool.c |  2 +-
 drivers/net/ethernet/ti/cpts.h         |  3 +-
 drivers/net/ethernet/ti/netcp_ethss.c  | 10 ++--
 7 files changed, 45 insertions(+), 60 deletions(-)

diff --git a/arch/arm/configs/keystone_defconfig b/arch/arm/configs/keystone_defconfig
index 11e2211f9007..a66c37efa15b 100644
--- a/arch/arm/configs/keystone_defconfig
+++ b/arch/arm/configs/keystone_defconfig
@@ -1,44 +1,41 @@
 # CONFIG_SWAP is not set
 CONFIG_POSIX_MQUEUE=y
 CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_CGROUPS=y
+CONFIG_BLK_CGROUP=y
+CONFIG_CGROUP_SCHED=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_CGROUP_SCHED=y
-CONFIG_BLK_CGROUP=y
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_KALLSYMS_ALL=y
 # CONFIG_ELF_CORE is not set
 # CONFIG_BASE_FULL is not set
+CONFIG_KALLSYMS_ALL=y
 CONFIG_EMBEDDED=y
 CONFIG_PROFILING=y
-CONFIG_OPROFILE=y
-CONFIG_KPROBES=y
-CONFIG_MODULES=y
-CONFIG_MODULE_FORCE_LOAD=y
-CONFIG_MODULE_UNLOAD=y
-CONFIG_MODULE_FORCE_UNLOAD=y
-CONFIG_MODVERSIONS=y
 CONFIG_ARCH_KEYSTONE=y
 CONFIG_ARM_LPAE=y
-CONFIG_PCI=y
-CONFIG_PCI_MSI=y
-CONFIG_PCI_KEYSTONE=y
 CONFIG_SMP=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_ARM_PSCI=y
-CONFIG_PREEMPT=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
-CONFIG_CMA=y
 CONFIG_VFP=y
 CONFIG_NEON=y
 # CONFIG_SUSPEND is not set
 CONFIG_PM=y
+CONFIG_TI_SCI_PROTOCOL=y
+CONFIG_OPROFILE=y
+CONFIG_KPROBES=y
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_FORCE_UNLOAD=y
+CONFIG_MODVERSIONS=y
+CONFIG_CMA=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
@@ -65,9 +62,6 @@ CONFIG_IP_MROUTE_MULTIPLE_TABLES=y
 CONFIG_IP_PIMSM_V2=y
 CONFIG_INET_AH=y
 CONFIG_INET_IPCOMP=y
-CONFIG_INET6_XFRM_MODE_TRANSPORT=m
-CONFIG_INET6_XFRM_MODE_TUNNEL=m
-CONFIG_INET6_XFRM_MODE_BEET=m
 CONFIG_IPV6_SIT=m
 CONFIG_IPV6_MULTIPLE_TABLES=y
 CONFIG_IPV6_SUBTREES=y
@@ -93,7 +87,6 @@ CONFIG_NETFILTER_XT_MATCH_MARK=y
 CONFIG_NETFILTER_XT_MATCH_MULTIPORT=y
 CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
 CONFIG_NETFILTER_XT_MATCH_STATE=y
-CONFIG_NF_CONNTRACK_IPV4=y
 CONFIG_IP_NF_IPTABLES=y
 CONFIG_IP_NF_MATCH_AH=y
 CONFIG_IP_NF_MATCH_ECN=y
@@ -114,17 +107,18 @@ CONFIG_VLAN_8021Q=y
 CONFIG_CAN=m
 CONFIG_CAN_C_CAN=m
 CONFIG_CAN_C_CAN_PLATFORM=m
+CONFIG_PCI=y
+CONFIG_PCI_MSI=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
-CONFIG_DMA_CMA=y
 CONFIG_MTD=y
 CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_BLOCK=y
 CONFIG_MTD_PLATRAM=y
-CONFIG_MTD_M25P80=y
 CONFIG_MTD_RAW_NAND=y
 CONFIG_MTD_NAND_DAVINCI=y
 CONFIG_MTD_SPI_NOR=y
+CONFIG_SPI_CADENCE_QUADSPI=y
 CONFIG_MTD_UBI=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_SRAM=y
@@ -134,8 +128,12 @@ CONFIG_BLK_DEV_SD=y
 CONFIG_NETDEVICES=y
 CONFIG_TI_KEYSTONE_NETCP=y
 CONFIG_TI_KEYSTONE_NETCP_ETHSS=y
-CONFIG_TI_CPTS=y
+CONFIG_DP83867_PHY=y
 CONFIG_MARVELL_PHY=y
+CONFIG_MICREL_PHY=y
+CONFIG_INPUT_EVDEV=m
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_GPIO_DECODER=m
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
@@ -147,14 +145,16 @@ CONFIG_I2C_DAVINCI=y
 CONFIG_SPI=y
 CONFIG_SPI_DAVINCI=y
 CONFIG_SPI_SPIDEV=y
+CONFIG_PTP_1588_CLOCK=y
 CONFIG_PINCTRL_SINGLE=y
 CONFIG_GPIOLIB=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_DAVINCI=y
 CONFIG_GPIO_SYSCON=y
-CONFIG_POWER_SUPPLY=y
+CONFIG_GPIO_PCA953X=m
 CONFIG_POWER_RESET=y
 CONFIG_POWER_RESET_KEYSTONE=y
+CONFIG_POWER_SUPPLY=y
 # CONFIG_HWMON is not set
 CONFIG_WATCHDOG=y
 CONFIG_DAVINCI_WATCHDOG=y
@@ -166,8 +166,8 @@ CONFIG_USB_MON=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_DWC3=y
-CONFIG_NOP_USB_XCEIV=y
 CONFIG_KEYSTONE_USB_PHY=y
+CONFIG_NOP_USB_XCEIV=y
 CONFIG_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
@@ -180,9 +180,10 @@ CONFIG_LEDS_TRIGGERS=y
 CONFIG_LEDS_TRIGGER_ONESHOT=y
 CONFIG_LEDS_TRIGGER_HEARTBEAT=y
 CONFIG_LEDS_TRIGGER_BACKLIGHT=y
+CONFIG_LEDS_TRIGGER_CPU=y
+CONFIG_LEDS_TRIGGER_ACTIVITY=y
 CONFIG_LEDS_TRIGGER_GPIO=y
 CONFIG_DMADEVICES=y
-CONFIG_TI_EDMA=y
 CONFIG_MAILBOX=y
 CONFIG_TI_MESSAGE_MANAGER=y
 CONFIG_SOC_TI=y
@@ -196,7 +197,6 @@ CONFIG_PWM_TIECAP=m
 CONFIG_KEYSTONE_IRQ=y
 CONFIG_RESET_TI_SCI=m
 CONFIG_RESET_TI_SYSCON=m
-CONFIG_TI_SCI_PROTOCOL=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_FANOTIFY=y
@@ -217,10 +217,6 @@ CONFIG_NFSD_V3=y
 CONFIG_NFSD_V3_ACL=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
-CONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
-CONFIG_DEBUG_SHIRQ=y
-CONFIG_DEBUG_USER=y
 CONFIG_CRYPTO_USER=y
 CONFIG_CRYPTO_AUTHENC=y
 CONFIG_CRYPTO_CBC=y
@@ -230,12 +226,8 @@ CONFIG_CRYPTO_DES=y
 CONFIG_CRYPTO_ANSI_CPRNG=y
 CONFIG_CRYPTO_USER_API_HASH=y
 CONFIG_CRYPTO_USER_API_SKCIPHER=y
-CONFIG_SPI_CADENCE_QUADSPI=y
-CONFIG_INPUT_MISC=y
-CONFIG_INPUT_EVDEV=m
-CONFIG_INPUT_GPIO_DECODER=m
-CONFIG_GPIO_PCA953X=m
-CONFIG_LEDS_TRIGGER_ACTIVITY=y
-CONFIG_LEDS_TRIGGER_CPU=y
-CONFIG_MICREL_PHY=y
-CONFIG_DP83867_PHY=y
+CONFIG_DMA_CMA=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_SHIRQ=y
+CONFIG_DEBUG_USER=y
diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index 3cc3ca5fa027..e00f0d871c53 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -57,7 +57,6 @@ CONFIG_CPUFREQ_DT=m
 CONFIG_ARM_TI_CPUFREQ=y
 CONFIG_CPU_IDLE=y
 CONFIG_ARM_CPUIDLE=y
-CONFIG_DT_IDLE_STATES=y
 CONFIG_KERNEL_MODE_NEON=y
 CONFIG_PM_DEBUG=y
 CONFIG_ARM_CRYPTO=y
@@ -189,7 +188,6 @@ CONFIG_SMSC911X=y
 CONFIG_TI_DAVINCI_EMAC=y
 CONFIG_TI_CPSW=y
 CONFIG_TI_CPSW_SWITCHDEV=y
-CONFIG_TI_CPTS=y
 # CONFIG_NET_VENDOR_VIA is not set
 # CONFIG_NET_VENDOR_WIZNET is not set
 CONFIG_DP83848_PHY=y
@@ -274,6 +272,7 @@ CONFIG_SPI_TI_QSPI=m
 CONFIG_HSI=m
 CONFIG_OMAP_SSI=m
 CONFIG_SSI_PROTOCOL=m
+CONFIG_PTP_1588_CLOCK=y
 CONFIG_PINCTRL_SINGLE=y
 CONFIG_DEBUG_GPIO=y
 CONFIG_GPIO_SYSFS=y
diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
index 8e348780efb6..f3f8bb724294 100644
--- a/drivers/net/ethernet/ti/Kconfig
+++ b/drivers/net/ethernet/ti/Kconfig
@@ -77,23 +77,18 @@ config TI_CPSW_SWITCHDEV
 	  will be called cpsw_new.
 
 config TI_CPTS
-	bool "TI Common Platform Time Sync (CPTS) Support"
+	tristate "TI Common Platform Time Sync (CPTS) Support"
 	depends on TI_CPSW || TI_KEYSTONE_NETCP || TI_CPSW_SWITCHDEV || COMPILE_TEST
 	depends on COMMON_CLK
-	depends on POSIX_TIMERS
+	depends on PTP_1588_CLOCK
+	default y if TI_CPSW=y || TI_KEYSTONE_NETCP=y || TI_CPSW_SWITCHDEV=y
+	default m
 	---help---
 	  This driver supports the Common Platform Time Sync unit of
 	  the CPSW Ethernet Switch and Keystone 2 1g/10g Switch Subsystem.
 	  The unit can time stamp PTP UDP/IPv4 and Layer 2 packets, and the
 	  driver offers a PTP Hardware Clock.
 
-config TI_CPTS_MOD
-	tristate
-	depends on TI_CPTS
-	depends on PTP_1588_CLOCK
-	default y if TI_CPSW=y || TI_KEYSTONE_NETCP=y || TI_CPSW_SWITCHDEV=y
-	default m
-
 config TI_K3_AM65_CPSW_NUSS
 	tristate "TI K3 AM654x/J721E CPSW Ethernet driver"
 	depends on ARCH_K3 && OF && TI_K3_UDMA_GLUE_LAYER
diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile
index 53792190e9c2..cb26a9d21869 100644
--- a/drivers/net/ethernet/ti/Makefile
+++ b/drivers/net/ethernet/ti/Makefile
@@ -13,7 +13,7 @@ obj-$(CONFIG_TI_DAVINCI_EMAC) += ti_davinci_emac.o
 ti_davinci_emac-y := davinci_emac.o davinci_cpdma.o
 obj-$(CONFIG_TI_DAVINCI_MDIO) += davinci_mdio.o
 obj-$(CONFIG_TI_CPSW_PHY_SEL) += cpsw-phy-sel.o
-obj-$(CONFIG_TI_CPTS_MOD) += cpts.o
+obj-$(CONFIG_TI_CPTS) += cpts.o
 obj-$(CONFIG_TI_CPSW) += ti_cpsw.o
 ti_cpsw-y := cpsw.o davinci_cpdma.o cpsw_ale.o cpsw_priv.o cpsw_sl.o cpsw_ethtool.o
 obj-$(CONFIG_TI_CPSW_SWITCHDEV) += ti_cpsw_new.o
diff --git a/drivers/net/ethernet/ti/cpsw_ethtool.c b/drivers/net/ethernet/ti/cpsw_ethtool.c
index fa54efe3be63..19a7370a4188 100644
--- a/drivers/net/ethernet/ti/cpsw_ethtool.c
+++ b/drivers/net/ethernet/ti/cpsw_ethtool.c
@@ -709,7 +709,7 @@ int cpsw_set_ringparam(struct net_device *ndev,
 	return ret;
 }
 
-#if IS_ENABLED(CONFIG_TI_CPTS)
+#if IS_REACHABLE(CONFIG_TI_CPTS)
 int cpsw_get_ts_info(struct net_device *ndev, struct ethtool_ts_info *info)
 {
 	struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
diff --git a/drivers/net/ethernet/ti/cpts.h b/drivers/net/ethernet/ti/cpts.h
index bb997c11ee15..782e24c78e7a 100644
--- a/drivers/net/ethernet/ti/cpts.h
+++ b/drivers/net/ethernet/ti/cpts.h
@@ -8,7 +8,7 @@
 #ifndef _TI_CPTS_H_
 #define _TI_CPTS_H_
 
-#if IS_ENABLED(CONFIG_TI_CPTS)
+#if IS_REACHABLE(CONFIG_TI_CPTS)
 
 #include <linux/clk.h>
 #include <linux/clkdev.h>
@@ -171,5 +171,4 @@ static inline bool cpts_can_timestamp(struct cpts *cpts, struct sk_buff *skb)
 }
 #endif
 
-
 #endif
diff --git a/drivers/net/ethernet/ti/netcp_ethss.c b/drivers/net/ethernet/ti/netcp_ethss.c
index fb36115e9c51..3de1d25128b7 100644
--- a/drivers/net/ethernet/ti/netcp_ethss.c
+++ b/drivers/net/ethernet/ti/netcp_ethss.c
@@ -181,7 +181,7 @@
 
 #define HOST_TX_PRI_MAP_DEFAULT			0x00000000
 
-#if IS_ENABLED(CONFIG_TI_CPTS)
+#if IS_REACHABLE(CONFIG_TI_CPTS)
 /* Px_TS_CTL register fields */
 #define TS_RX_ANX_F_EN				BIT(0)
 #define TS_RX_VLAN_LT1_EN			BIT(1)
@@ -2000,7 +2000,7 @@ static int keystone_set_link_ksettings(struct net_device *ndev,
 	return phy_ethtool_ksettings_set(phy, cmd);
 }
 
-#if IS_ENABLED(CONFIG_TI_CPTS)
+#if IS_REACHABLE(CONFIG_TI_CPTS)
 static int keystone_get_ts_info(struct net_device *ndev,
 				struct ethtool_ts_info *info)
 {
@@ -2532,7 +2532,7 @@ static int gbe_del_vid(void *intf_priv, int vid)
 	return 0;
 }
 
-#if IS_ENABLED(CONFIG_TI_CPTS)
+#if IS_REACHABLE(CONFIG_TI_CPTS)
 
 static void gbe_txtstamp(void *context, struct sk_buff *skb)
 {
@@ -2977,7 +2977,7 @@ static int gbe_close(void *intf_priv, struct net_device *ndev)
 	return 0;
 }
 
-#if IS_ENABLED(CONFIG_TI_CPTS)
+#if IS_REACHABLE(CONFIG_TI_CPTS)
 static void init_slave_ts_ctl(struct gbe_slave *slave)
 {
 	slave->ts_ctl.uni = 1;
@@ -3718,7 +3718,7 @@ static int gbe_probe(struct netcp_device *netcp_device, struct device *dev,
 
 	gbe_dev->cpts = cpts_create(gbe_dev->dev, gbe_dev->cpts_reg, cpts_node);
 	of_node_put(cpts_node);
-	if (IS_ENABLED(CONFIG_TI_CPTS) && IS_ERR(gbe_dev->cpts)) {
+	if (IS_REACHABLE(CONFIG_TI_CPTS) && IS_ERR(gbe_dev->cpts)) {
 		ret = PTR_ERR(gbe_dev->cpts);
 		goto free_sec_ports;
 	}
-- 
2.20.1


^ permalink raw reply related	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2020-05-07 21:37 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-02 23:39 [PATCH] net: ethernet: ti: Remove TI_CPTS_MOD workaround Clay McClure
2020-05-04 15:09 ` Tony Lindgren
2020-05-04 15:16 ` Arnd Bergmann
2020-05-04 16:57   ` [PATCH v2] " Clay McClure
2020-05-05  7:41     ` Grygorii Strashko
2020-05-06  6:51       ` Clay McClure
2020-05-06 20:56         ` Grygorii Strashko
2020-05-07 21:37           ` Arnd Bergmann

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