The init_cpu_topology function can be put into the __init section
and discarded after boot, because it is only called from
smp_prepare_cpus, which is also marked __init. This was reported
by gcc after Vincent Guittot added the parse_dt_topology function
in 339ca09d7ada "ARM: 7463/1: topology: Update cpu_power according to DT
information".
Without this patch, building kzm9g_defconfig results in:
WARNING: vmlinux.o(.text+0xb5a0): Section mismatch in reference from the
function init_cpu_topology() to the function .init.text:parse_dt_topology()
The function init_cpu_topology() references
the function __init parse_dt_topology().
This is often because init_cpu_topology lacks a __init
annotation or the annotation of parse_dt_topology is wrong.
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Cc: Vincent Guittot <vincent.guit...@linaro.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Cc: Russell King <rmk+ker...@arm.linux.org.uk>
---
arch/arm/kernel/topology.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index 198b084..26c12c6 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -321,7 +321,7 @@ void store_cpu_topology(unsigned int cpuid)
* init_cpu_topology is called at boot when only one cpu is running
* which prevent simultaneous write access to cpu_topology array
*/
-void init_cpu_topology(void)
+void __init init_cpu_topology(void)
{
unsigned int cpu;
--
1.7.10
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