mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2025-04-21 12:27:27 +03:00
Initial OLPC target
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9457 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
ryd
234
target/linux/olpc/patches/300-block2mtd_init.patch
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234
target/linux/olpc/patches/300-block2mtd_init.patch
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@@ -0,0 +1,234 @@
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Index: linux-2.6.23/drivers/mtd/devices/block2mtd.c
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===================================================================
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--- linux-2.6.23.orig/drivers/mtd/devices/block2mtd.c 2007-10-25 21:43:40.854599193 +0200
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+++ linux-2.6.23/drivers/mtd/devices/block2mtd.c 2007-10-25 22:23:19.066125745 +0200
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@@ -20,6 +20,7 @@
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#include <linux/buffer_head.h>
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#include <linux/mutex.h>
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#include <linux/mount.h>
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+#include <linux/list.h>
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#define VERSION "$Revision: 1.30 $"
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@@ -27,6 +28,12 @@
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#define ERROR(fmt, args...) printk(KERN_ERR "block2mtd: " fmt "\n" , ## args)
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#define INFO(fmt, args...) printk(KERN_INFO "block2mtd: " fmt "\n" , ## args)
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+struct retry {
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+ struct list_head list;
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+ const char *val;
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+};
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+
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+static LIST_HEAD(retry_list);
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/* Info for the block device */
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struct block2mtd_dev {
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@@ -38,10 +45,36 @@
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char devname[0];
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};
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+static int block2mtd_setup2(const char *val);
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/* Static info about the MTD, used in cleanup_module */
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static LIST_HEAD(blkmtd_device_list);
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+static int add_retry(const char *val)
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+{
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+ struct retry *r = kmalloc(sizeof(struct retry), GFP_KERNEL);
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+
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+ INIT_LIST_HEAD(&r->list);
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+ r->val = val;
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+ list_add(&r->list, &retry_list);
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+
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+ return 0;
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+}
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+
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+static int __init process_retries(void)
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+{
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+ struct list_head *p, *tmp;
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+
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+ list_for_each_safe(p, tmp, &retry_list) {
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+ struct retry *r = list_entry(p, struct retry, list);
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+ block2mtd_setup2(r->val);
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+ msleep(100);
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+ list_del(p);
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+ kfree(r);
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+ }
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+ return 0;
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+}
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+rootfs_initcall(process_retries);
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static struct page *page_read(struct address_space *mapping, int index)
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{
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@@ -518,7 +551,10 @@
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if (token[2] && (strlen(token[2]) + 1 > 80))
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parse_err("mtd device name too long");
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- add_device(name, erase_size, token[2]);
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+ if (add_device(name, erase_size, token[2]) == NULL) {
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+ add_retry(val);
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+ return 0;
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+ }
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return 0;
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}
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@@ -534,8 +570,11 @@
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and block2mtd_init() has already been called,
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we can parse the argument now. */
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- if (block2mtd_init_called)
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+ if (block2mtd_init_called) {
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+ /* if the call failed (e.g. because the device does not exist yet)
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+ * then try again just before attempting to mount the rootfs */
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return block2mtd_setup2(val);
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+ }
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/* During early boot stage, we only save the parameters
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here. We must parse them later: if the param passed
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Index: linux-2.6.23/init/do_mounts.c
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===================================================================
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--- linux-2.6.23.orig/init/do_mounts.c 2007-10-25 21:39:41.824977672 +0200
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+++ linux-2.6.23/init/do_mounts.c 2007-10-25 21:41:22.466712918 +0200
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@@ -241,16 +241,8 @@
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return 1;
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}
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-static unsigned int __initdata root_delay;
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-static int __init root_delay_setup(char *str)
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-{
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- root_delay = simple_strtoul(str, NULL, 0);
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- return 1;
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-}
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-
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__setup("rootflags=", root_data_setup);
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__setup("rootfstype=", fs_names_setup);
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-__setup("rootdelay=", root_delay_setup);
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static void __init get_fs_names(char *page)
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{
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@@ -426,18 +418,6 @@
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{
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int is_floppy;
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- if (root_delay) {
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- printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
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- root_delay);
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- ssleep(root_delay);
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- }
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-
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- /* wait for the known devices to complete their probing */
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- while (driver_probe_done() != 0)
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- msleep(100);
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-
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- md_run_setup();
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-
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if (saved_root_name[0]) {
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root_device_name = saved_root_name;
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if (!strncmp(root_device_name, "mtd", 3)) {
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Index: linux-2.6.23/init/main.c
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===================================================================
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--- linux-2.6.23.orig/init/main.c 2007-10-25 21:35:50.567799083 +0200
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+++ linux-2.6.23/init/main.c 2007-10-25 21:56:43.279187031 +0200
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@@ -65,6 +65,7 @@
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#ifdef CONFIG_X86_LOCAL_APIC
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#include <asm/smp.h>
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#endif
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+#include "do_mounts.h"
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/*
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* This is one of the first .c files built. Error out early if we have compiler
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@@ -662,13 +663,14 @@
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__setup("initcall_debug", initcall_debug_setup);
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extern initcall_t __initcall_start[], __initcall_end[];
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+extern initcall_t __root_initcall_start[], __root_initcall_end[];
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-static void __init do_initcalls(void)
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+static void __init do_initcalls(initcall_t *start, initcall_t *end)
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{
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initcall_t *call;
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int count = preempt_count();
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- for (call = __initcall_start; call < __initcall_end; call++) {
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+ for (call = start; call < end; call++) {
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ktime_t t0, t1, delta;
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char *msg = NULL;
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char msgbuf[40];
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@@ -737,7 +739,7 @@
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usermodehelper_init();
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driver_init();
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init_irq_proc();
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- do_initcalls();
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+ do_initcalls(__initcall_start, __initcall_end);
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}
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static int __initdata nosoftlockup;
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@@ -810,6 +812,14 @@
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panic("No init found. Try passing init= option to kernel.");
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}
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+static unsigned int __initdata root_delay;
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+static int __init root_delay_setup(char *str)
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+{
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+ root_delay = simple_strtoul(str, NULL, 0);
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+ return 1;
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+}
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+__setup("rootdelay=", root_delay_setup);
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+
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static int __init kernel_init(void * unused)
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{
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lock_kernel();
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@@ -851,6 +861,17 @@
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if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {
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ramdisk_execute_command = NULL;
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+ if (root_delay) {
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+ printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
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+ root_delay);
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+ ssleep(root_delay);
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+ }
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+ /* wait for the known devices to complete their probing */
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+ while (driver_probe_done() != 0)
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+ msleep(100);
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+ md_run_setup();
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+ do_initcalls(__root_initcall_start, __root_initcall_end);
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+
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prepare_namespace();
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}
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Index: linux-2.6.23/arch/i386/kernel/vmlinux.lds.S
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===================================================================
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--- linux-2.6.23.orig/arch/i386/kernel/vmlinux.lds.S 2007-10-26 00:07:08.465118962 +0200
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+++ linux-2.6.23/arch/i386/kernel/vmlinux.lds.S 2007-10-26 00:10:15.259763782 +0200
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@@ -146,6 +146,11 @@
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INITCALLS
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__initcall_end = .;
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}
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+ .root_initcall.init : AT(ADDR(.root_initcall.init) - LOAD_OFFSET) {
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+ __root_initcall_start = .;
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+ INITCALLS_ROOT
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+ __root_initcall_end = .;
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+ }
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.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
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__con_initcall_start = .;
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*(.con_initcall.init)
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Index: linux-2.6.23/include/asm-generic/vmlinux.lds.h
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===================================================================
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--- linux-2.6.23.orig/include/asm-generic/vmlinux.lds.h 2007-10-26 00:08:46.558708993 +0200
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+++ linux-2.6.23/include/asm-generic/vmlinux.lds.h 2007-10-26 00:09:24.296859571 +0200
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@@ -243,12 +243,14 @@
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*(.initcall4s.init) \
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*(.initcall5.init) \
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*(.initcall5s.init) \
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- *(.initcallrootfs.init) \
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*(.initcall6.init) \
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*(.initcall6s.init) \
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*(.initcall7.init) \
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*(.initcall7s.init)
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+#define INITCALLS_ROOT \
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+ *(.initcallrootfs.init)
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+
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#define PERCPU(align) \
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. = ALIGN(align); \
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__per_cpu_start = .; \
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