Commit 6b0f68e32ea8 ("mm: add utility for early copy from unmapped
ram") introduces a function copy_from_early_mem() into mm/early_ioremap.c
which itself calls early_memremap()/early_memunmap(). However, since
early_memunmap() has not been declared yet at this point in the .c file,
nor by any explicitly included header files, we are depending on a
transitive include of asm/early_ioremap.h to declare it, which is fragile.
So instead, include this header explicitly.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
I ran into this by accident when trying to enable to the generic ioremap
implementation for 32-bit ARM.
mm/early_ioremap.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c
index 23f744d77ce0..17ae14b5aefa 100644
--- a/mm/early_ioremap.c
+++ b/mm/early_ioremap.c
@@ -15,6 +15,7 @@
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <asm/fixmap.h>
+#include <asm/early_ioremap.h>
#ifdef CONFIG_MMU
static int early_ioremap_debug __initdata;
--
1.9.1
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