sparc64: Implement IRQ stacks.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 4e821b3ecb03..217de3ea29e8 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -49,6 +49,7 @@
 #include <asm/sstate.h>
 #include <asm/mdesc.h>
 #include <asm/cpudata.h>
+#include <asm/irq.h>
 
 #define MAX_PHYS_ADDRESS        (1UL << 42UL)
 #define KPTE_BITMAP_CHUNK_SZ    (256UL * 1024UL * 1024UL)
@@ -1771,6 +1772,16 @@ void __init paging_init(void)
         if (tlb_type == hypervisor)
                 sun4v_mdesc_init();
 
+        /* Once the OF device tree and MDESC have been setup, we know
+         * the list of possible cpus.  Therefore we can allocate the
+         * IRQ stacks.
+         */
+        for_each_possible_cpu(i) {
+                /* XXX Use node local allocations... XXX */
+                softirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
+                hardirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
+        }
+
         /* Setup bootmem... */
         last_valid_pfn = end_pfn = bootmem_init(phys_base);