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Message-Id: <20210524190919.2616-1-rdunlap@infradead.org>
Date: Mon, 24 May 2021 12:09:19 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: linux-kernel@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
Rob Herring <robh+dt@...nel.org>,
Frank Rowand <frowand.list@...il.com>,
devicetree@...r.kernel.org,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
kernel test robot <lkp@...el.com>
Subject: [PATCH v2] OF: of_address: clean up OF stub & extern functions
Adjust <linux/of_address.h> so that stubs are present when
CONFIG_OF is not set *or* OF is set but OF_ADDRESS is not set.
This eliminates 2 build errors on arch/s390/ when HAS_IOMEM
is not set (so OF_ADDRESS is not set).
I.e., it provides a stub for of_iomap() when one was previously
not provided as well as removing some duplicate externs.
s390-linux-ld: drivers/irqchip/irq-al-fic.o: in function `al_fic_init_dt':
irq-al-fic.c:(.init.text+0x7a): undefined reference to `of_iomap'
s390-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_init':
timer-of.c:(.init.text+0xa4): undefined reference to `of_iomap'
Tested with many randconfig builds, but there could still be some
hidden problem here.
Fixes: 4acf4b9cd453 ("of: move of_address_to_resource and of_iomap declarations from sparc")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Frank Rowand <frowand.list@...il.com>
Cc: devicetree@...r.kernel.org
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Reported-by: kernel test robot <lkp@...el.com>
---
v2: handle SPARC as a special case since it provides its own versions of
of_address_to_resource() and of_iomap();
fix build errors reported by lkp/ktr and address comments from Laurent;
do more randconfig build testing;
include/linux/of_address.h | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
--- linux-next-20210524.orig/include/linux/of_address.h
+++ linux-next-20210524/include/linux/of_address.h
@@ -106,11 +106,12 @@ static inline bool of_dma_is_coherent(st
}
#endif /* CONFIG_OF_ADDRESS */
-#ifdef CONFIG_OF
+#ifdef CONFIG_SPARC /* SPARC has its own versions of these */
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
-void __iomem *of_iomap(struct device_node *node, int index);
-#else
+extern void __iomem *of_iomap(struct device_node *device, int index);
+#else /* !CONFIG_SPARC */
+#if (defined(CONFIG_OF) && !defined(CONFIG_OF_ADDRESS)) || !defined(CONFIG_OF)
static inline int of_address_to_resource(struct device_node *dev, int index,
struct resource *r)
{
@@ -121,7 +122,9 @@ static inline void __iomem *of_iomap(str
{
return NULL;
}
-#endif
+#endif /* (defined(CONFIG_OF) && !defined(CONFIG_OF_ADDRESS)) || !defined(CONFIG_OF) */
+#endif /* CONFIG_SPARC */
+
#define of_range_parser_init of_pci_range_parser_init
#if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
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