From fae1ded3a78230241aee97bc6415a1af4f5b6c69 Mon Sep 17 00:00:00 2001
From: Yinghai Lu <yhlu.kernel@gmail.com>
Date: Tue, 19 Aug 2008 20:49:43 -0700
Subject: [PATCH] --- yaml --- r: 116388 b: refs/heads/master c:
 3ddfda11861d305b02ed810b522dcf48b74ca808 h: refs/heads/master v: v3

---
 [refs]                                  |  2 +-
 trunk/include/asm-generic/vmlinux.lds.h |  7 +++++++
 trunk/include/linux/init.h              | 23 +++++++++++++++++++++++
 trunk/init/main.c                       | 24 ++++++++++++++++++++++++
 4 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 26e30274a196..bc6de36751b7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 38395738f581ce9417402f28774a8c4650264a00
+refs/heads/master: 3ddfda11861d305b02ed810b522dcf48b74ca808
diff --git a/trunk/include/asm-generic/vmlinux.lds.h b/trunk/include/asm-generic/vmlinux.lds.h
index 7440a0dceddb..7881406c03ec 100644
--- a/trunk/include/asm-generic/vmlinux.lds.h
+++ b/trunk/include/asm-generic/vmlinux.lds.h
@@ -210,6 +210,13 @@
  * All archs are supposed to use RO_DATA() */
 #define RODATA RO_DATA(4096)
 
+#define DYN_ARRAY_INIT(align)							\
+	. = ALIGN((align));						\
+	.dyn_array.init : AT(ADDR(.dyn_array.init) - LOAD_OFFSET) {	\
+		VMLINUX_SYMBOL(__dyn_array_start) = .;			\
+		*(.dyn_array.init)					\
+		VMLINUX_SYMBOL(__dyn_array_end) = .;			\
+	}
 #define SECURITY_INIT							\
 	.security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
 		VMLINUX_SYMBOL(__security_initcall_start) = .;		\
diff --git a/trunk/include/linux/init.h b/trunk/include/linux/init.h
index 93538b696e3d..cf9fa7f174af 100644
--- a/trunk/include/linux/init.h
+++ b/trunk/include/linux/init.h
@@ -246,6 +246,29 @@ struct obs_kernel_param {
 
 /* Relies on boot_command_line being set */
 void __init parse_early_param(void);
+
+struct dyn_array {
+	void **name;
+	unsigned long size;
+	unsigned int *nr;
+	unsigned long align;
+	void (*init_work)(void *);
+};
+extern struct dyn_array *__dyn_array_start[], *__dyn_array_end[];
+
+#define DEFINE_DYN_ARRAY(nameX, sizeX, nrX, alignX, init_workX) \
+		static struct dyn_array __dyn_array_##nameX __initdata = \
+		{	.name = (void **)&nameX,\
+			.size = sizeX,\
+			.nr   = &nrX,\
+			.align = alignX,\
+			.init_work = init_workX,\
+		}; \
+		static struct dyn_array *__dyn_array_ptr_##nameX __used \
+		__attribute__((__section__(".dyn_array.init"))) = \
+			&__dyn_array_##nameX
+
+extern void pre_alloc_dyn_array(void);
 #endif /* __ASSEMBLY__ */
 
 /**
diff --git a/trunk/init/main.c b/trunk/init/main.c
index 27f6bf6108e9..638d3a786412 100644
--- a/trunk/init/main.c
+++ b/trunk/init/main.c
@@ -536,6 +536,29 @@ void __init __weak thread_info_cache_init(void)
 {
 }
 
+void pre_alloc_dyn_array(void)
+{
+#ifdef CONFIG_HAVE_DYN_ARRAY
+	unsigned long size, phys = 0;
+	struct dyn_array **daa;
+
+	for (daa = __dyn_array_start ; daa < __dyn_array_end; daa++) {
+		struct dyn_array *da = *daa;
+
+		size = da->size * (*da->nr);
+		print_fn_descriptor_symbol("dyna_array %s ", da->name);
+		printk(KERN_CONT "size:%#lx nr:%d align:%#lx",
+			da->size, *da->nr, da->align);
+		*da->name = __alloc_bootmem(size, da->align, phys);
+		phys = virt_to_phys(*da->name);
+		printk(KERN_CONT " ==> [%#lx - %#lx]\n", phys, phys + size);
+
+		if (da->init_work)
+			da->init_work(da);
+	}
+#endif
+}
+
 asmlinkage void __init start_kernel(void)
 {
 	char * command_line;
@@ -567,6 +590,7 @@ asmlinkage void __init start_kernel(void)
 	printk(KERN_NOTICE);
 	printk(linux_banner);
 	setup_arch(&command_line);
+	pre_alloc_dyn_array();
 	mm_init_owner(&init_mm, &init_task);
 	setup_command_line(command_line);
 	unwind_setup();