[RFC PATCH 1/2] ARM: DT: kernel: move temporary cpu map stack array to static data
Lorenzo Pieralisi
lorenzo.pieralisi at arm.com
Tue Apr 16 02:13:21 EST 2013
As the number of CPUs increase, the temporary array allocated on the
stack in arm_dt_init_cpu_maps() can become too big and trigger stack
issues.
This patch moves the allocated memory to static __initdata so that stack
data is not used anymore to allocate the temporary array.
Memory is marked as __initdata since it need not be persistent after boot.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
---
arch/arm/kernel/devtree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index 70f1bde..f149217 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -78,11 +78,12 @@ void __init arm_dt_init_cpu_maps(void)
* contain a list of MPIDR[23:0] values where MPIDR[31:24] must
* read as 0.
*/
+ static u32 tmp_map[NR_CPUS] __initdata = {
+ [0 ... NR_CPUS-1] = UINT_MAX };
struct device_node *cpu, *cpus;
u32 i, j, cpuidx = 1;
u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0;
- u32 tmp_map[NR_CPUS] = { [0 ... NR_CPUS-1] = UINT_MAX };
bool bootcpu_valid = false;
cpus = of_find_node_by_path("/cpus");
--
1.7.12
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