#include
i
the driver crashes the moment it reaches add_disk…….following are the /var/log/messages…….rest works properly…..
hope if ani one helps.ya mi home directory has 0 bytes memory
Aug 5 10:03:45 zaffer kernel: [ 5936.683085]
Begin : start
Aug 5 10:03:45 zaffer kernel:
[ 5936.683087] HELLO KERNEL
Aug 5 10:03:45 zaffer kernel:[ 5936.683090] Registration Sucessful
Aug 5 10:03:45 zaffer kernel: [ 5936.683091]
Aug 5 10:03:45 zaffer kernel: [ 5936.683093] Major no is 252
Aug 5 10:03:45 zaffer kernel: [ 5936.683134] Memory allocation of block device sucessful
Aug 5 10:03:45 zaffer kernel: [ 5936.683135]
Aug 5 10:03:45 zaffer kernel: [ 5936.683136] after spin_lock
Aug 5 10:03:45 zaffer kernel: [ 5936.683137]
Aug 5 10:03:45 zaffer kernel: [ 5936.683145] alloc_disk sucessful
Aug 5 10:03:45 zaffer kernel: [ 5936.683146]
Aug 5 10:03:45 zaffer kernel: [ 5936.683161] sbullmajor
Aug 5 10:03:45 zaffer kernel: [ 5936.683162]
Aug 5 10:03:45 zaffer kernel: [ 5936.683163] sbullminor
Aug 5 10:03:45 zaffer kernel: [ 5936.683164]
Aug 5 10:03:45 zaffer kernel: [ 5936.683165] first_minor
Aug 5 10:03:45 zaffer kernel: [ 5936.683166]
Aug 5 10:03:45 zaffer kernel: [ 5936.683167] file_operations
Aug 5 10:03:45 zaffer kernel: [ 5936.683168]
Aug 5 10:03:45 zaffer kernel: [ 5936.683169] Queue
Aug 5 10:03:45 zaffer kernel: [ 5936.683169]
Aug 5 10:03:45 zaffer kernel: [ 5936.683170] private_data
Aug 5 10:03:45 zaffer kernel: [ 5936.683171]
Aug 5 10:03:45 zaffer kernel: [ 5936.683172] sbulla
Aug 5 10:03:45 zaffer kernel: [ 5936.683173]
Aug 5 10:03:45 zaffer kernel: [ 5936.683174] set_capacity
Aug 5 10:03:45 zaffer kernel: [ 5936.683175]
Aug 5 10:03:45 zaffer kernel: [ 5936.683176] ————[ cut here ]————
Aug 5 10:03:45 zaffer kernel: [ 5936.683183] WARNING: at block/genhd.c:527 add_disk+0x4d/0xef()
the message at block/genhd.c is as follows
void register_disk(struct gendisk *disk)
{
struct device *ddev = disk_to_dev(disk);
struct block_device *bdev;
struct disk_part_iter piter;
struct hd_struct *part;
int err;
ddev->parent = disk->driverfs_dev;
dev_set_name(ddev, disk->disk_name);
delay uevents, until we scanned partition table
dev_set_uevent_suppress(ddev, 1);
if (device_add(ddev))
return;
527 if (!sysfs_deprecated) {
err = sysfs_create_link(block_depr, &ddev->kobj,
kobject_name(&ddev->kobj));
if (err) {
device_del(ddev);
return;
}
}
}
nt main()
{
printf(“hello\n”);
return 0;
/*
Aug 5 10:03:45 zaffer kernel:
[ 5936.683085] Begin : start
Aug 5 10:03:45 zaffer kernel:
[ 5936.683087] HELLO KERNEL
Aug 5 10:03:45 zaffer kernel:
[ 5936.683090] Registration Sucessful
Aug 5 10:03:45 zaffer kernel:
[ 5936.683091]
Aug 5 10:03:45 zaffer kernel:
[ 5936.683093] Major no is 252
Aug 5 10:03:45 zaffer kernel: [ 5936.683134] Memory allocation of block device sucessful
Aug 5 10:03:45 zaffer kernel: [ 5936.683135]
Aug 5 10:03:45 zaffer kernel: [ 5936.683136] after spin_lock
Aug 5 10:03:45 zaffer kernel: [ 5936.683137]
Aug 5 10:03:45 zaffer kernel: [ 5936.683145] alloc_disk sucessful
Aug 5 10:03:45 zaffer kernel: [ 5936.683146]
Aug 5 10:03:45 zaffer kernel: [ 5936.683161] sbullmajor
Aug 5 10:03:45 zaffer kernel: [ 5936.683162]
Aug 5 10:03:45 zaffer kernel: [ 5936.683163] sbullminor
Aug 5 10:03:45 zaffer kernel: [ 5936.683164]
Aug 5 10:03:45 zaffer kernel: [ 5936.683165] first_minor
Aug 5 10:03:45 zaffer kernel: [ 5936.683166]
Aug 5 10:03:45 zaffer kernel: [ 5936.683167] file_operations
Aug 5 10:03:45 zaffer kernel: [ 5936.683168]
Aug 5 10:03:45 zaffer kernel: [ 5936.683169] Queue
Aug 5 10:03:45 zaffer kernel: [ 5936.683169]
Aug 5 10:03:45 zaffer kernel: [ 5936.683170] private_data
Aug 5 10:03:45 zaffer kernel: [ 5936.683171]
Aug 5 10:03:45 zaffer kernel: [ 5936.683172] sbulla
Aug 5 10:03:45 zaffer kernel: [ 5936.683173]
Aug 5 10:03:45 zaffer kernel: [ 5936.683174] set_capacity
Aug 5 10:03:45 zaffer kernel: [ 5936.683175]
Aug 5 10:03:45 zaffer kernel: [ 5936.683176] ————[ cut here ]————
Aug 5 10:03:45 zaffer kernel: [ 5936.683183] WARNING: at block/genhd.c:527 add_disk+0x4d/0xef()
the message at block/genhd.c is as follows
void register_disk(struct gendisk *disk)
{
struct device *ddev = disk_to_dev(disk);
struct block_device *bdev;
struct disk_part_iter piter;
struct hd_struct *part;
int err;
ddev->parent = disk->driverfs_dev;
dev_set_name(ddev, disk->disk_name);
delay uevents, until we scanned partition table
dev_set_uevent_suppress(ddev, 1);
if (device_add(ddev))
return;
527 if (!sysfs_deprecated) {
err = sysfs_create_link(block_depr, &ddev->kobj,
kobject_name(&ddev->kobj));
if (err) {
device_del(ddev);
return;
}
}
}
