[PATCH v11 01/10] of/fdt: make generic early_init_dt_add_memory_arch() a weak alias

David Daney
2016-02-20T01:13:10Z

From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

The function early_init_dt_add_memory_arch() is defined as __weak
so that archs can override it. However, in this override implementation,
it may still be useful to invoke the generic implementation, so instead,
rename the generic version to early_init_dt_add_memory() and turn the
original definition into a weak alias. This way, the generic version can
still be called even in the presence of an arch specific override.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: David Daney <david.daney@cavium.com>
---
drivers/of/fdt.c | 7 +++++--
include/linux/of_fdt.h | 1 +
2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 655f79d..cba8281 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -980,7 +980,7 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
#define MAX_MEMBLOCK_ADDR ((phys_addr_t)~0)
#endif

-void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
+void __init early_init_dt_add_memory(u64 base, u64 size)
{
const u64 phys_offset = __pa(PAGE_OFFSET);

@@ -1038,7 +1038,7 @@ void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align)
return __va(memblock_alloc(size, align));
}
#else
-void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
+void __init early_init_dt_add_memory(u64 base, u64 size)
{
WARN_ON(1);
}
@@ -1058,6 +1058,9 @@ void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align)
}
#endif

+__weak __alias(early_init_dt_add_memory)
+void early_init_dt_add_memory_arch(u64 base, u64 size);
+
bool __init early_init_dt_verify(void *params)
{
if (!params)
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index df9ef38..463a06b 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -65,6 +65,7 @@ extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data);
extern void early_init_fdt_scan_reserved_mem(void);
extern void early_init_fdt_reserve_self(void);
+extern void early_init_dt_add_memory(u64 base, u64 size);
extern void early_init_dt_add_memory_arch(u64 base, u64 size);
extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size,
bool no_map);
--
1.8.3.1