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| author | Stefan Weinhuber <wein@de.ibm.com> | 2009-03-26 15:23:47 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-26 15:24:05 +0100 |
| commit | b44b0ab3bac16356f03e94b1b49ba9305710c445 (patch) | |
| tree | 66dfc19e2164a6a30d19b958ccf4e4a5d210c8d8 /arch/s390/include/asm/dasd.h | |
| parent | f9a28f7bc5225af476f8d4bb669038da8801b7c4 (diff) | |
| download | op-kernel-dev-b44b0ab3bac16356f03e94b1b49ba9305710c445.zip op-kernel-dev-b44b0ab3bac16356f03e94b1b49ba9305710c445.tar.gz | |
[S390] dasd: add large volume support
The dasd device driver will now support ECKD devices with more then
65520 cylinders.
In the traditional ECKD adressing scheme each track is addressed
by a 16-bit cylinder and 16-bit head number. The new addressing
scheme makes use of the fact that the actual number of heads is
never larger then 15, so 12 bits of the head number can be redefined
to be part of the cylinder address.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/dasd.h')
| -rw-r--r-- | arch/s390/include/asm/dasd.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h index e2db6f1..218bce8 100644 --- a/arch/s390/include/asm/dasd.h +++ b/arch/s390/include/asm/dasd.h @@ -162,15 +162,15 @@ typedef struct dasd_profile_info_t { unsigned int dasd_io_nr_req[32]; /* histogram of # of requests in chanq */ } dasd_profile_info_t; -/* +/* * struct format_data_t * represents all data necessary to format a dasd */ typedef struct format_data_t { - int start_unit; /* from track */ - int stop_unit; /* to track */ - int blksize; /* sectorsize */ - int intensity; + unsigned int start_unit; /* from track */ + unsigned int stop_unit; /* to track */ + unsigned int blksize; /* sectorsize */ + unsigned int intensity; } format_data_t; /* |
