x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86

[linux-drm-fsl-dcu.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 431b67a6098ca5907e2a2d27a3ec88ce77bd48be..dbd9b8d7b7cc2baa8c425bf35191ce8dfd117ecf 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -287,21 +287,20 @@ static void set_max_threads(unsigned int max_threads_suggested)
        max_threads = clamp_t(u64, threads, MIN_THREADS, MAX_THREADS);
 }
 
-int __weak arch_task_struct_size(void)
-{
-       return sizeof(struct task_struct);
-}
+#ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
+/* Initialized by the architecture: */
+int arch_task_struct_size __read_mostly;
+#endif
 
 void __init fork_init(void)
 {
-       int task_struct_size = arch_task_struct_size();
 #ifndef CONFIG_ARCH_TASK_STRUCT_ALLOCATOR
 #ifndef ARCH_MIN_TASKALIGN
 #define ARCH_MIN_TASKALIGN     L1_CACHE_BYTES
 #endif
        /* create a slab on which task_structs can be allocated */
        task_struct_cachep =
-               kmem_cache_create("task_struct", task_struct_size,
+               kmem_cache_create("task_struct", arch_task_struct_size,
                        ARCH_MIN_TASKALIGN, SLAB_PANIC | SLAB_NOTRACK, NULL);
 #endif