linux-kernel - [PATCH] of: fdt: add stub for early_init_dt

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Date:   Wed,  5 Oct 2022 20:11:16 -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, Rich Felker <dalias@...c.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH] of: fdt: add stub for early_init_dt_scan()

When CONFIG_OF_EARLY_FLATTREE and CONFIG_SH_DEVICE_TREE are not set,
SH3 build fails with a call to early_init_dt_scan(), so add a stub for
this function.

../arch/sh/kernel/setup.c: In function 'sh_fdt_init':
../arch/sh/kernel/setup.c:262:26: error: implicit declaration of function 'early_init_dt_scan' [-Werror=implicit-function-declaration]
  262 |         if (!dt_virt || !early_init_dt_scan(dt_virt)) {

Fixes: 7480e0aabd5f ("sh: add device tree support and generic board using device tree")
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: Rich Felker <dalias@...c.org>
Cc: Arnd Bergmann <arnd@...db.de>
---
 include/linux/of_fdt.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -85,6 +85,7 @@ extern void early_init_devtree(void *);
 extern void early_get_first_memblock_info(void *, phys_addr_t *);
 #else /* CONFIG_OF_EARLY_FLATTREE */
 static inline void early_init_dt_check_for_usable_mem_range(void) {}
+static inline bool early_init_dt_scan(void *params) { return false; }
 static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; }
 static inline void early_init_fdt_scan_reserved_mem(void) {}
 static inline void early_init_fdt_reserve_self(void) {}