diff options
Diffstat (limited to 'target/linux/olpc/patches-2.6.30/300-block2mtd_init.patch')
| -rw-r--r-- | target/linux/olpc/patches-2.6.30/300-block2mtd_init.patch | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/target/linux/olpc/patches-2.6.30/300-block2mtd_init.patch b/target/linux/olpc/patches-2.6.30/300-block2mtd_init.patch new file mode 100644 index 0000000000..12165b52b5 --- /dev/null +++ b/target/linux/olpc/patches-2.6.30/300-block2mtd_init.patch @@ -0,0 +1,210 @@ +--- a/arch/x86/kernel/vmlinux_32.lds.S ++++ b/arch/x86/kernel/vmlinux_32.lds.S +@@ -136,6 +136,12 @@ SECTIONS + INITCALLS + __initcall_end = .; + } ++ .root_initcall.init : AT(ADDR(.root_initcall.init) - LOAD_OFFSET) { ++ __root_initcall_start = .; ++ INITCALLS_ROOT ++ __root_initcall_end = .; ++ } ++ + .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) { + __con_initcall_start = .; + *(.con_initcall.init) +--- a/drivers/mtd/devices/block2mtd.c ++++ b/drivers/mtd/devices/block2mtd.c +@@ -18,10 +18,18 @@ + #include <linux/buffer_head.h> + #include <linux/mutex.h> + #include <linux/mount.h> ++#include <linux/list.h> ++#include <linux/delay.h> + + #define ERROR(fmt, args...) printk(KERN_ERR "block2mtd: " fmt "\n" , ## args) + #define INFO(fmt, args...) printk(KERN_INFO "block2mtd: " fmt "\n" , ## args) + ++struct retry { ++ struct list_head list; ++ const char *val; ++}; ++ ++static LIST_HEAD(retry_list); + + /* Info for the block device */ + struct block2mtd_dev { +@@ -33,10 +41,34 @@ struct block2mtd_dev { + char devname[0]; + }; + ++static int block2mtd_setup2(const char *val); + + /* Static info about the MTD, used in cleanup_module */ + static LIST_HEAD(blkmtd_device_list); + ++static int add_retry(const char *val) { ++ struct retry *r = kmalloc(sizeof(struct retry), GFP_KERNEL); ++ ++ INIT_LIST_HEAD(&r->list); ++ r->val = val; ++ list_add(&r->list, &retry_list); ++ ++ return 0; ++} ++ ++static int __init process_retries(void) { ++ struct list_head *p, *tmp; ++ ++ list_for_each_safe(p, tmp, &retry_list) { ++ struct retry *r = list_entry(p, struct retry, list); ++ block2mtd_setup2(r->val); ++ msleep(100); ++ list_del(p); ++ kfree(r); ++ } ++ return 0; ++} ++rootfs_initcall(process_retries); + + static struct page *page_read(struct address_space *mapping, int index) + { +@@ -510,7 +542,9 @@ static int block2mtd_setup2(const char * + if (token[2] && (strlen(token[2]) + 1 > 80)) + parse_err("mtd device name too long"); + +- add_device(name, erase_size, token[2]); ++ if (add_device(name, erase_size, token[2]) == NULL) { ++ add_retry(val); ++ } + + return 0; + } +--- a/include/asm-generic/vmlinux.lds.h ++++ b/include/asm-generic/vmlinux.lds.h +@@ -447,12 +447,14 @@ + *(.initcall4s.init) \ + *(.initcall5.init) \ + *(.initcall5s.init) \ +- *(.initcallrootfs.init) \ + *(.initcall6.init) \ + *(.initcall6s.init) \ + *(.initcall7.init) \ + *(.initcall7s.init) + ++#define INITCALLS_ROOT \ ++ *(.initcallrootfs.init) ++ + /** + * PERCPU_VADDR - define output section for percpu area + * @vaddr: explicit base address (optional) +--- a/init/do_mounts.c ++++ b/init/do_mounts.c +@@ -176,16 +176,8 @@ static int __init fs_names_setup(char *s + return 1; + } + +-static unsigned int __initdata root_delay; +-static int __init root_delay_setup(char *str) +-{ +- root_delay = simple_strtoul(str, NULL, 0); +- return 1; +-} +- + __setup("rootflags=", root_data_setup); + __setup("rootfstype=", fs_names_setup); +-__setup("rootdelay=", root_delay_setup); + + static void __init get_fs_names(char *page) + { +@@ -365,23 +357,6 @@ void __init prepare_namespace(void) + { + int is_floppy; + +- if (root_delay) { +- printk(KERN_INFO "Waiting %dsec before mounting root device...\n", +- root_delay); +- ssleep(root_delay); +- } +- +- /* +- * wait for the known devices to complete their probing +- * +- * Note: this is a potential source of long boot delays. +- * For example, it is not atypical to wait 5 seconds here +- * for the touchpad of a laptop to initialize. +- */ +- wait_for_device_probe(); +- +- md_run_setup(); +- + if (saved_root_name[0]) { + root_device_name = saved_root_name; + if (!strncmp(root_device_name, "mtd", 3) || +--- a/init/main.c ++++ b/init/main.c +@@ -76,6 +76,7 @@ + #ifdef CONFIG_X86_LOCAL_APIC + #include <asm/smp.h> + #endif ++#include "do_mounts.h" + + static int kernel_init(void *); + +@@ -752,12 +753,13 @@ int do_one_initcall(initcall_t fn) + + + extern initcall_t __initcall_start[], __initcall_end[], __early_initcall_end[]; ++extern initcall_t __root_initcall_start[], __root_initcall_end[]; + +-static void __init do_initcalls(void) ++static void __init do_initcalls(initcall_t *start, initcall_t *end) + { + initcall_t *call; + +- for (call = __early_initcall_end; call < __initcall_end; call++) ++ for (call = start; call < end; call++) + do_one_initcall(*call); + + /* Make sure there is no pending stuff from the initcall sequence */ +@@ -779,7 +781,7 @@ static void __init do_basic_setup(void) + usermodehelper_init(); + driver_init(); + init_irq_proc(); +- do_initcalls(); ++ do_initcalls(__early_initcall_end, __initcall_end); + } + + static void __init do_pre_smp_initcalls(void) +@@ -840,6 +842,13 @@ static noinline int init_post(void) + panic("No init found. Try passing init= option to kernel."); + } + ++static unsigned int __initdata root_delay; ++static int __init root_delay_setup(char *str) ++{ ++ root_delay = simple_strtoul(str, NULL, 0); ++ return 1; ++} ++__setup("rootdelay=", root_delay_setup); + static int __init kernel_init(void * unused) + { + lock_kernel(); +@@ -879,7 +888,16 @@ static int __init kernel_init(void * unu + + if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) { + ramdisk_execute_command = NULL; +- prepare_namespace(); ++ if (root_delay) { ++ printk(KERN_INFO "Waiting %desc before mounting root device...\n", ++ root_delay); ++ ssleep(root_delay); ++ } ++ while (driver_probe_done() != 0) ++ msleep(100); ++ md_run_setup(); ++ do_initcalls(__root_initcall_start, __root_initcall_end); ++ prepare_namespace(); + } + + /* |